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Wang H, Hua Y, Xu H, Liu H, Yang D, Dai X. Illuminating the role of powder carrier materials in shaping sludge aggregation in wastewater treatment: Insights from extended operation performance to microbial response mechanism. BIORESOURCE TECHNOLOGY 2024; 410:131268. [PMID: 39142416 DOI: 10.1016/j.biortech.2024.131268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 08/02/2024] [Accepted: 08/11/2024] [Indexed: 08/16/2024]
Abstract
This study uncovered the response of novel micro-granule wastewater treatment technology to different powder carrier materials. Characteristics and distinctions among different systems were assessed based on process performance, sludge aggregation capacity, and microbial metabolism. Zeolite carrier system exhibited remarkable nitrogen removal efficiency of 89.6 ± 0.9 %, while diatomite carriers, in conjunction with intermittent aeration, enhanced simultaneous nitrification and denitrification from 2.6 % to 27.1 %. Iron-based carriers demonstrated efficient phosphorus removal (94.7 ± 1.2 %) through both chemical and microbial pathways. Specific surface area, pore structure and biocompatibility of powder carriers determined the formation and size of micro-granules. Tryptophan-like substances, C-(C/H), and Npr in extracellular polymeric substances strongly correlated with sludge hydrophobicity and granulation. Significant enrichment in norank_Comamonadaceae and Nitrosomonas in zeolite powder carrier system promoted partial nitrification and endogenous denitrification. Differences in metabolic pathways elucidated the up-regulation of amino acid synthesis, energy metabolism, and membrane transport as potential mechanisms driving micro-granule formation and efficient treatment performance.
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Affiliation(s)
- Hong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yu Hua
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
| | - Haolian Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Haoyu Liu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Donghai Yang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
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2
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Askari SS, Giri BS, Basheer F, Izhar T, Ahmad SA, Mumtaz N. Enhancing sequencing batch reactors for efficient wastewater treatment across diverse applications: A comprehensive review. ENVIRONMENTAL RESEARCH 2024; 260:119656. [PMID: 39034021 DOI: 10.1016/j.envres.2024.119656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 06/29/2024] [Accepted: 07/19/2024] [Indexed: 07/23/2024]
Abstract
This review explores recent progress in sequencing batch reactors (SBRs) and hybrid systems for wastewater treatment, emphasizing their adaptability and effectiveness in managing diverse wastewater compositions. Through extensive literature analysis from 1985 to 2024, the integration of advanced technologies like photocatalysis within hybrid systems is highlighted, showing promise for improved pollutant removal efficiencies. Insights into operational parameters, reactor design, and microbial communities influencing SBR performance are discussed. Sequencing batch biofilm reactors (SBBRs) demonstrate exceptional efficiency in Chemical Oxygen Demand, nitrogen, and phosphorus removal, while innovative anaerobic-aerobic-anoxic sequencing batch reactors (AOA-SBRs) offer effective nutrient removal strategies. Hybrid systems, particularly photocatalytic sequencing batch reactors (PSBRs), show potential for removing persistent pollutants like antibiotics and phenols, underscoring the significance of advanced oxidation processes. However, research gaps persist, including the need for comparative studies between different SBR types and comprehensive evaluations of long-term performance, environmental variability, and economic viability. Addressing these gaps will be vital for the practical deployment of SBRs and hybrid systems. Further exploration of synergies, economic considerations, and reactor stability will enhance the sustainability and scalability of these technologies for efficient and eco-friendly wastewater treatment.
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Affiliation(s)
- Syed Shuja Askari
- Department of Civil Engineering, Integral University, Lucknow, 226026, India
| | - Balendu Shekher Giri
- School of Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, 248007, India
| | - Farrukh Basheer
- Department of Civil Engineering, Aligarh Muslim University, Aligarh, 202002, India
| | - Tabish Izhar
- Department of Civil Engineering, Integral University, Lucknow, 226026, India
| | - Syed Aqeel Ahmad
- Department of Civil Engineering, Integral University, Lucknow, 226026, India
| | - Neha Mumtaz
- Department of Civil Engineering, Integral University, Lucknow, 226026, India.
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3
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Gao X, Zhang L, Liu J, Zhang Y, Peng Y. First application of the novel anaerobic/aerobic/anoxic (AOA) process for advanced nutrient removal in a wastewater treatment plant. WATER RESEARCH 2024; 252:121234. [PMID: 38310803 DOI: 10.1016/j.watres.2024.121234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/18/2023] [Accepted: 01/28/2024] [Indexed: 02/06/2024]
Abstract
The stringent effluent quality standards in wastewater treatment plants (WWTPs) can effectively mitigate environmental issues such as eutrophication by reducing the discharge of nutrients into water environments. However, the current wastewater treatment process often struggles to achieve advanced nutrient removal while also saving energy and reducing carbon consumption. The first full-scale anaerobic/aerobic/anoxic (AOA) system was established with a wastewater treatment scale of 40,000 m3/d. Over one year of operation, the average TN and TP concentration in the effluent of 7.53 ± 0.81 and 0.37 ± 0.05 mg/L was achieved in low TN/COD (C/N) ratio (average 5) wastewater treatment. The post-anoxic zones fully utilized the internal carbon source stored in pre-anaerobic zones, removing 41.29 % of TN and 36.25 % of TP. Intracellular glycogen (Gly) and proteins in extracellular polymeric substances (EPS) served as potential drivers for post-anoxic denitrification and phosphorus uptake. The sludge fermentation process was enhanced by the long anoxic hydraulic retention time (HRT) of the AOA system. The relative abundance of fermentative bacteria was 31.66 - 55.83 %, and their fermentation metabolites can provide additional substrates and energy for nutrient removal. The development and utilization of internal carbon sources in the AOA system benefited from reducing excess sludge production, energy conservation, and advanced nutrient removal under carbon-limited. The successful full-scale validation of the AOA process provided a potentially transformative technology with wide applicability to WWTPs.
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Affiliation(s)
- Xinjie Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Jinjin Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yong Zhang
- Beijing Belant Environmental Technology Co., Ltd., Beijing 100071, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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Chen R, Liu X, Wang J, Chen J, Wang X, Lv Y, Xu J, Wang S, Li D, He X, Hou J. Exploring organic matter conversion pathway and its effect on nitrogen removal in tidal flow constructed wetlands. CHEMOSPHERE 2024; 349:140927. [PMID: 38081523 DOI: 10.1016/j.chemosphere.2023.140927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/22/2023] [Accepted: 12/07/2023] [Indexed: 12/18/2023]
Abstract
Achieving effective nitrogen removal remains a significant challenge faced by constructed wetlands. Although organic matter is a crucial factor influencing nitrogen removal, little attention has been paid to the impact of organic matter conversion pathways on nitrogen removal in constructed wetlands. Here, we showed that endogenous microorganisms performing carbon internalization could be easily enriched in tidal flow constructed wetlands (TFCWs) under its special rhythmic cycle of anaerobic/aerobic operational mode. Endogenous microorganisms could translate influent carbon sources into intracellular carbons during the anaerobic stage and supply the carbon source for endogenous denitrification after the aerobic stage (rest period). Based on these findings, an innovative combined TFCW and Nitrifying-CW system was developed, and robust total nitrogen (TN) removal (82% on average) was achieved even under carbon source limiting conditions. This performance was a substantial improvement compared to the conventional single bed TFCW with multiple "tides" (corresponding to the multiple contact/rest periods) with TN removal of only 54% on average. Simultaneous nitrification-endogenous denitrification (SNED) was found to be the major nitrogen removal pathway in the proposed system. Compared with classical nitrification-denitrification, simultaneous nitrification-endogenous denitrification brings high nitrogen conversion rates and significantly reduces the demand for oxygen and organic carbon. Furthermore, microbial community analysis indicated that endogenous microorganisms such as Candidatus_Competibacter and Defluviicoccus were successfully enriched, accounting for 50.73% and 3.46% in CW1, and 25.25% and 1.76% in CW2, respectively. Together, these mechanisms allow the proposed system to achieve efficient TN removal.
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Affiliation(s)
- Ruiya Chen
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xueyu Liu
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jie Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jieyu Chen
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiaoning Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yabing Lv
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Juchen Xu
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Shaodi Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Dapeng Li
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, 430070, China; Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, Wuhan, 430070, China
| | - Xugang He
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, 430070, China; Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, Wuhan, 430070, China.
| | - Jie Hou
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, 430070, China; Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, Wuhan, 430070, China.
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Franzoni RM, Bernardelli JKB, Silveira DD, Gomes SD, Lapolli FR, Carvalho KQD, Passig FH. Performance of an anaerobic-oxic-anoxic (AOA) system in the simultaneous removal of nutrients and triclosan and bacterial community. ENVIRONMENTAL TECHNOLOGY 2024; 45:544-558. [PMID: 35980262 DOI: 10.1080/09593330.2022.2114859] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
The constant presence of triclosan (TCS) in surface water and wastewater has been verified due to its application in several pharmaceutical and personal care products. Thus, removing this emerging contaminant is essential to minimize the contamination of water bodies. The anaerobic-aerobic-anoxic (AOA) system is an innovative alternative that combines the removal of nutrients and triclosan. This study focuses on the simultaneous removal of carbonaceous matter, nitrogen, phosphorus, and triclosan in a continuous pilot-scale AOA system from synthetic wastewater. The upflow system, in series, was operated at hydraulic retention time (HRT) of 8 h and a flowrate of 2.40 L h-1. Glucose (190 mg L-1) was added to the anoxic reactor as the external carbon source. Besides that, bacterial community structure was investigated using 16S rRNA sequencing in each reactor. The system achieved average removal efficiencies of 96% (14.03 g d-1) for Chemical Oxygen Demand (COD), 85% (2.64 g d-1) for Total Kjeldahl Nitrogen (TKN), 88% (1.40 g d-1) for Total Ammonia Nitrogen (TAN), 20% (0.12 g d-1) for Total Phosphorus (TP), and 93% (1.87 μg d-1) for Triclosan (TCS). The phyla Proteobacteria, Firmicutes, Bacteroidetes, and Chloroflexi were found in greater abundance. The main genera identified were Anaeromusa, Aeromonas, Azospira, Clostridium, and Lactococcus. The organisms related to phylum and genus corroborate the involved processes and the removal performance achieved. In addition, Lactococcus, Thermomonas, Ferruginibacter, and Dechloromonas were involved in triclosan biodegradation. The anaerobic-oxic-anoxic system successfully removed carbonaceous, nitrogenous matter, and triclosan, with glucose increasing the denitrifying activity.
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Affiliation(s)
- Ruana Mendonça Franzoni
- Civil Engineering Graduate Program, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
| | | | - Daniele Damasceno Silveira
- Environmental Engineering Graduate Program, Federal University of Santa Catarina - Santa Catarina (UFSC), Florianópolis, Brazil
| | - Simone Damasceno Gomes
- Agricultural Engineering Graduate Program, Western Paraná State University (UNIOESTE/CCET/PGEAGRI), Cascavel, Brazil
| | - Flávio Rubens Lapolli
- Environmental Engineering Graduate Program, Federal University of Santa Catarina - Santa Catarina (UFSC), Florianópolis, Brazil
| | - Karina Querne de Carvalho
- Academic Department of Civil Construction, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
| | - Fernando Hermes Passig
- Chemistry and Biology Academic Department, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
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6
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Li Z, Cheng Y, Zeng M, Luo Y, Hou Y, Wu J, Nie J, Long B. Effect of in situ ultrasonic wave and influent ammonia nitrogen fluctuation on stability of aerobic granular sludge. ENVIRONMENTAL TECHNOLOGY 2023:1-14. [PMID: 38008972 DOI: 10.1080/09593330.2023.2283087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/09/2023] [Indexed: 11/28/2023]
Abstract
This study elucidates the impact of fluctuating influent conditions and in situ ultrasonic wave exposure on the stability of aerobic granular sludge (AGS) in the treatment of simulated wastewater emanating from rare earth mining operations. During a stable influent period spanning from Day 1 to Day 95, the seed granules underwent an initial disintegration followed by a re-granulation phase. The secondary granulation was achieved on Day 80 and Day 40 for the ultrasonic reactor (R1) and the control reactor (R2), respectively. Notably, granules formed in R1 exhibited a more porous structure compared to those generated in R2. Subsequently, when the ammonia nitrogen in the influent oscillated between 100 and 500 mg/L during Days 96-140, both reactors yielded compact and densely structured granules. Nitrogen removal profiles were comparable between the two reactors: the removal efficiencies for ammonia nitrogen and total inorganic nitrogen escalated from 95% and 80%, respectively, during Days 1-95, to 95% and 90%, respectively, post-Day 140. A suite of performance metrics indicated that steady-state granules from R1 outperformed those from R2 across several parameters. Specifically, the nitrification/denitrification rates, and relative abundance of denitrifying bacteria were all higher in granules from R1. Conversely, the relative abundance of nitrifying bacteria was comparable between granules from both reactors. However, R1 granules demonstrated lower sludge concentration and smaller average particle size than their R2 counterparts. In conclusion, the AGS system demonstrated robust resilience to fluctuating ammonia nitrogen, and the application of ultrasonic waves significantly enhanced granular activity while achieving in situ sludge reduction.
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Affiliation(s)
- Zhenghao Li
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
| | - Yuanyuan Cheng
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
| | - Mingjing Zeng
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
| | - Yi Luo
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
| | - Yiran Hou
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
| | - Junfeng Wu
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Pingdingshan, People's Republic of China
| | - Jiale Nie
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
| | - Bei Long
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, People's Republic of China
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7
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McCullough K, Klaus S, Wilson C, Vanrolleghem PA, Gu AZ, Bott CB. Sidestream bio-P and mainstream anammox in a BNR process with upstream carbon capture. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10917. [PMID: 37559175 DOI: 10.1002/wer.10917] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/31/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023]
Abstract
The integration of biological phosphorus removal (bio-P) and shortcut nitrogen removal (SNR) processes is challenging because of the conflicting demands on influent carbon: SNR allows for upstream carbon diversion, but this reduction of influent carbon (especially volatile fatty acids [VFAs]) prevents or limits bio-P. The objective of this study was to achieve SNR, either via partial nitritation/anammox (PNA) or partial denitrification/anammox (PdNA), simultaneously with biological phosphorus removal in a process with upstream carbon capture. This study took place in a pilot scale A/B process with a sidestream bio-P reactor and tertiary anammox polishing. Despite low influent rbCOD concentrations from the A-stage effluent, bio-P occurred in the B-stage thanks to the addition of A-stage WAS fermentate to the sidestream reactor. Nitrite accumulation occurred in the B-stage via partial denitrification and partial nitritation (NOB out-selection), depending on operational conditions, and was removed along with ammonia by the tertiary anammox MBBR, with the ability to achieve effluent TIN less than 2 mg/L. PRACTITIONER POINTS: A sidestream reactor with sufficient fermentate addition enables biological phosphorus removal in a B-stage system with little-to-no influent VFA. Enhanced biological phosphorus removal is not inhibited by intermittent aeration and is stable at a wide range of process SRTs. Partial nitritation and partial denitrification are viable routes to produce nitrite within an A/B process with sidestream bio-P, for downstream anammox in a polishing MBBR.
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Affiliation(s)
- Kester McCullough
- modelEAU, Département de génie civil et de génie des eaux, Université Laval, Québec City, Québec, Canada
- Hampton Roads Sanitation District, Virginia Beach, Virginia, USA
| | - Stephanie Klaus
- Hampton Roads Sanitation District, Virginia Beach, Virginia, USA
| | | | - Peter A Vanrolleghem
- modelEAU, Département de génie civil et de génie des eaux, Université Laval, Québec City, Québec, Canada
| | - April Z Gu
- School of Civil and Environmental Engineering, Cornell University, Ithaca, New York, USA
| | - Charles B Bott
- Hampton Roads Sanitation District, Virginia Beach, Virginia, USA
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Kou L, Huang T, Zhang H, Li K, Hua F, Huang C, Liu X, Si F. Water-lifting and aeration system improves water quality of drinking water reservoirs: Biological mechanism and field application. J Environ Sci (China) 2023; 129:174-188. [PMID: 36804234 DOI: 10.1016/j.jes.2022.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 06/18/2023]
Abstract
Reservoirs have been served as the major source of drinking water for dozens of years. The water quality safety of large and medium reservoirs increasingly becomes the focus of public concern. Field test has proved that water-lifting and aeration system (WLAS) is a piece of effective equipment for in situ control and improvement of water quality. However, its intrinsic bioremediation mechanism, especially for nitrogen removal, still lacks in-depth investigation. Hence, the dynamic changes in water quality parameters, carbon source metabolism, species compositions and co-occurrence patterns of microbial communities were systematically studied in Jinpen Reservoir within a whole WLAS running cycle. The WLAS operation could efficiently reduce organic carbon (19.77%), nitrogen (21.55%) and phosphorus (65.60%), respectively. Biolog analysis revealed that the microbial metabolic capacities were enhanced via WLAS operation, especially in bottom water. High-throughput sequencing demonstrated that WLAS operation altered the diversity and distributions of microbial communities in the source water. The most dominant genus accountable for aerobic denitrification was identified as Dechloromonas. Furthermore, network analysis revealed that microorganisms interacted more closely through WLAS operation. Oxidation-reduction potential (ORP) and total nitrogen (TN) were regarded as the two main physicochemical parameters influencing microbial community structures, as confirmed by redundancy analysis (RDA) and Mantel test. Overall, the results will provide a scientific basis and an effective way for strengthening the in-situ bioremediation of micro-polluted source water.
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Affiliation(s)
- Liqing Kou
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
| | - Tinglin Huang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China.
| | - Haihan Zhang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
| | - Kai Li
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
| | - Fengyao Hua
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
| | - Cheng Huang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
| | - Xiang Liu
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
| | - Fan Si
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an 710055, China
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Wang Q, Xin W, Shao Z, Usman M, Li J, Shang P, Kou Y, El-Din MG, Chen C. Role of pretreatment type and microbial mechanisms on enhancing volatile fatty acids production during anaerobic fermentation of refinery waste activated sludge. BIORESOURCE TECHNOLOGY 2023; 381:129122. [PMID: 37141997 DOI: 10.1016/j.biortech.2023.129122] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 05/06/2023]
Abstract
This study compared the effects of alkaline, thermal, thermal-peroxymonosulfate (PMS), and alkyl polyglucose (APG) pretreatments on volatile fatty acids (VFAs) production from refinery waste activated sludge (RWAS), including VFAs yield, composition, organics components, microbial communities, and the potential improvement of mechanisms. All pretreatments effectively enhanced the bioconversion of RWAS and consequently promoted the hydrolysis process, which inhibited the methanogenesis process. However, the release of lignin/carboxyl-rich alicyclic molecules (CRAM)-like compounds and tannin substances in thermal-PMS and APG groups significantly influenced the acidogenesis and acetogenesis processes. Among all pretreatments, alkaline pretreatment showed the highest VFAs yield of 95.06 mg/g volatile solids (VS) and VS removal of 17%. This result could be associated with the enrichment of functional hydrolytic-acidification bacteria, such as Planococcus and Soehngenia, and increased metabolism of amino acids, carbohydrates, and nucleotides. By considering an economical and efficient perspective, this study recommended the alkaline pretreatment for the anaerobic fermentation of RWAS.
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Affiliation(s)
- Qinghong Wang
- State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China
| | - Wenzhuo Xin
- State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China
| | - Zhiguo Shao
- State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102200, China
| | - Muhammad Usman
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Jin Li
- State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China
| | - Pengyin Shang
- State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China
| | - Yue Kou
- State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China
| | - Mohamed Gamal El-Din
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Chunmao Chen
- State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China.
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10
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Kang D, Zhao X, Wang N, Suo Y, Yuan J, Peng Y. Redirecting carbon to recover VFA to facilitate biological short-cut nitrogen removal in wastewater treatment: A critical review. WATER RESEARCH 2023; 238:120015. [PMID: 37146394 DOI: 10.1016/j.watres.2023.120015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 05/07/2023]
Abstract
Wastewater treatment plants (WWTPs) are facing a great challenge to transition from energy-intensive to carbon-neutral and energy-efficient systems. Biological nutrient removal (BNR) can be severely impacted by carbon limitation, particularly for wastewater with a low carbon-to-nitrogen (C/N) ratio, which can significantly increase the operational costs. Waste activated sludge (WAS) is a valuable byproduct of WWTPs, as it contains high levels of organic matter that can be utilized to improve BNR management by recovering and reusing the fermentative volatile fatty acids (VFAs). This review provides a comprehensive examination of the recovery and reuse of VFAs in wastewater management, with a particular focus on advancing the preferable biological short-cut nitrogen removal process for carbon-insufficient municipal wastewaters. First, the method of carbon redirection for recovering VFAs was reviewed. Carbon could be captured through the two-stage A/B process or via sludge fermentation with different sludge pretreatment and process control strategies to accelerate sludge hydrolysis and inhibit methanogens to enhance VFA production. Second, VFAs can support the metabolism of autotrophic N-cycling microorganisms involved in wastewater treatment, such as AOB, NOB, anammox, and comammox bacteria. However, VFAs can also cause inhibition at high concentrations, leading to the partition of AOB and NOB; and can promote partial denitrification as an efficient carbon source for heterotrophic denitrifiers. Third, the lab- and pilot-scale engineering practices with different configurations (i.e., A2O, SBR, UASB) were summarized that have shown the feasibility of utilizing the fermentate to achieve superior nitrogen removal performance without the need for external carbon addition. Lastly, the future perspectives on leveraging the relationships between mainstream and sidestream, nitrogen and phosphorus, autotrophs and heterotrophs were given for sustainable and efficient BNR management.
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Affiliation(s)
- Da Kang
- Department of Environmental Engineering, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, China
| | - Xuwei Zhao
- Department of Environmental Engineering, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, China
| | - Nan Wang
- Department of Environmental Engineering, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, China
| | - Yirui Suo
- Department of Environmental Engineering, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, China
| | - Jiawei Yuan
- Department of Environmental Engineering, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, China
| | - Yongzhen Peng
- Department of Environmental Engineering, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, China.
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11
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Li W, Zhu X, Hou Y, Wang Y, Chen Y, Wang H. The treatment of high-concentration garlic processing wastewater by UASB-SBR. ENVIRONMENTAL TECHNOLOGY 2023; 44:921-935. [PMID: 34591752 DOI: 10.1080/09593330.2021.1988150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
The treatment of garlic processing wastewater was investigated in a UASB-SBR system. The experimental results showed that UASB was successfully started up after 64 days of continuous operation with COD removal rate of 45%. SBR start-up phase went through 60 days and the COD removal rate achieved 96%. UASB ran under optimal conditions (HRT of 45 h, pH of 7.5, and temperature of 35 ± 2°C) for 14d and performed well in organic matter treatment. SBR played a major part in nitrogen and phosphorus removal when running under optimal conditions (cycle time of 12 h, temperature of 25°C, organic loading of 0.72 kgCOD/(m3·d), and COD of 6000 mg/L) for 18d. Secondly, the microbial community structure indicated that the abundance of β-Proteobacteria and α-Proteobacteria in the sludge reached 30.05% and 47.57%, respectively, and played a crucial part for the organic matter, nitrogen and phosphorus removal in the SBR. After UASB-SBR system had been stabilised with influent COD of 9800 mg/L, the average COD, TP, NH3-N and TN removal rates were 99%, 94.82%, 87.07% and 94.87%, respectively, which were 3%, -2%, 1% and 3.5% higher than SBR running alone under optimal conditions. UASB coupled with SBR process had an excellent performance for high-concentration garlic processing wastewater.
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Affiliation(s)
- Wei Li
- Department of Civil and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Xinyu Zhu
- Department of Civil and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Yunhe Hou
- Department of Civil and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Yuqi Wang
- Department of Civil and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Yiming Chen
- Department of Civil and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - He Wang
- Department of Civil and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
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12
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Wang H, Zhang L, Dan Q, Zhang Y, Wang S, Zhang Q, Li X, Wang C, Peng Y. Ultra-high nitrogen removal from real municipal wastewater using selective enhancement of glycogen accumulating organisms (GAOs) in a partial nitrification-anammox (PNA) system. WATER RESEARCH 2023; 230:119594. [PMID: 36638736 DOI: 10.1016/j.watres.2023.119594] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/22/2022] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
Integrating endogenous denitrification (ED) into partial nitrification-anammox (PNA) systems by adequately utilizing organics in municipal wastewater is a promising approach to improve nitrogen removal efficiency (NRE). In this study, a novel strategy to inhibit phosphorus-accumulating organisms (PAOs) by inducing phosphorus release and exclusion was adopted intermittently, optimizing organics allocation between PAOs and glycogen-accumulating organisms (GAOs). Enhanced ED-synergized anammox was established to treat real municipal wastewater, achieving an NRE of 97.5±2.2% and effluent total inorganic nitrogen (TIN) of less than 2.0 mg/L. With low poly-phosphorus (poly-P) levels (poly-P/VSS below 0.01 (w/w)), glycogen accumulating metabolism (GAM) acquired organics exceeded that of phosphorus accumulating metabolism (PAM) and dominated endogenous metabolism. Ca. Competibacter (GAO) dominated the community following phosphorus-rich supernatant exclusion, with abundance increasing from 3.4% to 5.7%, accompanied by enhanced ED capacity (0.2 to 1.4 mg N/g VSS /h). The enriched subgroups (GB4, GB5) of Ca. Competibcater established a consistent nitrate cycle with anammox bacteria (AnAOB) through endogenous partial denitrification (EPD) at a ∆NO2--N/∆NH4+-N of 0.91±0.11, guaranteeing the maintenance of AnAOB abundance and performance. These results provide new insights into the flexibility of PNA for the energy-efficient treatment of low-strength ammonium wastewater.
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Affiliation(s)
- Hanbin Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Qiongpeng Dan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yingxin Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Chuanxin Wang
- Guangdong Shouhui Lantian Engineering and Technology Co. Ltd, Guangdong 510075, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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13
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Tang M, Guo Z, Xu X, Sun L, Wang X, Yang Y, Chen J. Performance and microbial mechanism of eletrotrophic bio-cathode denitrification under low temperature. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 328:116960. [PMID: 36493545 DOI: 10.1016/j.jenvman.2022.116960] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/26/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Insufficient amount of carbon in wastewater and low temperatures hinder the use of biological nitrogen removal for purification of wastewaters. Nitrogen removal using cold-tolerant electrotrophic cathodic microbes is a novel and unique autotrophic denitrification technique in which electrical current, not chemicals, is used as a source of electrons. In this study, integrated MFC (RW) and open-circuit MFC (RO) were cultured and acclimatized in stages at a low temperature (10 °C) to impart cold tolerance to electrotrophic cathodic microbes, investigate the effectiveness of simultaneous nitrification and denitrification (SND) process, and address the possible mechanism of microbial action. The results showed that (i) microbial communities in the RW system were successfully enriched with the cold-tolerant electrotrophic cathodic microbes after five stages, and (ii) the degree of NH4+-N removal and SND were 75.50% and 81.91%, respectively, but the respective values in the RO system were only 40.47% and 54.01%. The desirable SND efficiency was obtained in RW at a DO of ∼0.6 mg/L, a current of ∼20 mA, and pH ∼7.0. In RW, Thauera, Pesudomonas, and Hydrogenophaga were the main electrotrophic cathodic denitrifying bacteria with cold tolerance capable of degrading ammonia, nitrate, and nitrite through autotrophic denitrification and cathodic-driven bio-electrochemical denitrification. Besides, for RW, results from high throughput sequencing analysis revealed that the abundance of genes related to energy production and conversion, amino acid transport, and metabolism, signal transduction, environmental adaptation, and enzymatic activity (AMO, HAO, NAR, NIR, NOR, and NOS) were significantly higher than the corresponding parameters of the RO system. This may explain the reason behind RW having excellent ammonia and TN removal performance at low temperatures.
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Affiliation(s)
- Meizhen Tang
- School of Life Sciences, Qufu Normal University, No.57 Jingxuan West Road, Qufu, 273165, PR China.
| | - Zhina Guo
- School of Life Sciences, Qufu Normal University, No.57 Jingxuan West Road, Qufu, 273165, PR China
| | - Xiaoyan Xu
- School of Life Sciences, Qufu Normal University, No.57 Jingxuan West Road, Qufu, 273165, PR China
| | - Lianglun Sun
- School of Life Sciences, Qufu Normal University, No.57 Jingxuan West Road, Qufu, 273165, PR China
| | - Xiaoning Wang
- Shandong Deli Environmental Protection Engineering Co. Ltd, PR China
| | - Yuewei Yang
- School of Life Sciences, Qufu Normal University, No.57 Jingxuan West Road, Qufu, 273165, PR China
| | - Junfeng Chen
- School of Life Sciences, Qufu Normal University, No.57 Jingxuan West Road, Qufu, 273165, PR China
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14
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Wu T, Yang SS, Zhong L, Pang JW, Zhang L, Xia XF, Yang F, Xie GJ, Liu BF, Ren NQ, Ding J. Simultaneous nitrification, denitrification and phosphorus removal: What have we done so far and how do we need to do in the future? THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:158977. [PMID: 36155040 DOI: 10.1016/j.scitotenv.2022.158977] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/14/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen and phosphorus contamination in wastewater is a serious environmental concern and poses a global threat to sustainable development. In this paper, a comprehensive review of the studies on simultaneous nitrogen and phosphorus removal (SNPR) during 1986-2022 (538 publications) was conducted using bibliometrics, which showed that simultaneous nitrification, denitrification, and phosphorus removal (SNDPR) is the most promising process. To better understand SNDPR, the dissolved oxygen, carbon to nitrogen ratio, carbon source type, sludge retention time, Cu2+ and Fe3+, pH, salinity, electron acceptor type of denitrifying phosphorus-accumulating organisms (DPAOs), temperature, and other influencing factors were analyzed. Currently, SNDPR has been successfully implemented in activated sludge systems, aerobic granular sludge systems, biofilm systems, and constructed wetlands; sequential batch mode of operation is a common means to achieve this process. SNDPR exhibits a significant potential for phosphorus recovery. Future research needs to focus on: (1) balancing the competitiveness between denitrifying glycogen-accumulating organisms (DGAOs) and DPAOs, and countermeasures to deal with the effects of adverse conditions on SNDPR performance; (2) achieving SNDPR in continuous flow operation; and (3) maximizing the recovery of P during SNDPR to achieve resource sustainability. Overall, this study provides systematic and valuable information for deeper insights into SNDPR, which can help in further research.
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Affiliation(s)
- Tong Wu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shan-Shan Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Le Zhong
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ji-Wei Pang
- China Energy Conservation and Environmental Protection Group, Beijing 100089, China
| | - Luyan Zhang
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Xue-Fen Xia
- Institute of New Rural Development, Tongji University, No. 1239, Siping Road, Shanghai 200092, China
| | - Fan Yang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin 150008, China
| | - Guo-Jun Xie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Bing-Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jie Ding
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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15
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Yang S, Chang H, Peng Y, Zhang S, Han X, Sun S, Liu J, Zhang L. Advanced nutrient removal and external sludge reduction: Demonstration in a pilot-scale sequencing batch reactor. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10837. [PMID: 36683357 DOI: 10.1002/wer.10837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/29/2022] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
Although the addition of excess sludge fermentation products to improve nutrient removal from sewage is cost-effective, its application has rarely been demonstrated. In this study, the external sludge was first collected and fermented under a sludge retention time of 10 days, then introduced into SBR with a 1:15 sewage ratio. The results revealed a gradual increase in the nitrite accumulation ratio to 34.7% in the SBR at the end of the oxic stage after 64 days of adding fermented sludge products. In addition, the average effluent total nitrogen and phosphorous decreased to 7.3 and 0.5 mg/L, corresponding to removal efficiencies of 86.7% and 95.5%, respectively. On the other hand, the use of the fermented sludge products as external organic carbon sources in the SBR increased the external sludge reduction ratio to 42.5%. High-throughput sequencing demonstrated that the increase in the endogenous denitrifier community, polyphosphate-accumulating organisms, and fermentation bacteria were the main factors contributing to the increase in nutrient removal and excess sludge reduction. The economic evaluation indicated that the operational cost of the pilot-scale system saves 0.011$/m3 of sewage treated. PRACTITIONER POINTS: Fermented sludge addition effectively enhanced nutrient removal in pilot-scale SBR. Average effluent TN and PO4 3- -P decreased to 7.3 and 0.5 mg/L, respectively. Highest external sludge reduction rate was 42.5% in pilot-scale reactor. Sewage treatment cost can save 0.011$/m3 under advanced nutrient removal.
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Affiliation(s)
- Shenhua Yang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, China
- SDIC XinKai Water Environment Investment Co., Ltd, Beijing, China
| | - Haibin Chang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, China
| | - Shujun Zhang
- Beijing Drainage Group Co., Ltd (BDG), Beijing, China
| | - Xiaoyu Han
- Beijing Drainage Group Co., Ltd (BDG), Beijing, China
| | - Shihao Sun
- SDIC XinKai Water Environment Investment Co., Ltd, Beijing, China
| | - Jinjin Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, China
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16
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Coats ER, Appel FJ, Guho N, Brinkman CK, Mellin J. Interrogating the performance and microbial ecology of an enhanced biological phosphorus removal/post-anoxic denitrification process at bench and pilot scales. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10852. [PMID: 36987547 DOI: 10.1002/wer.10852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/09/2023] [Accepted: 03/18/2023] [Indexed: 06/19/2023]
Abstract
Research focused on interrogating post-anoxic enhanced biological phosphorus removal (EBPR) at bench and pilot scales. Average bench-scale effluent ranged from 0.33 to 1.4 mgP/L, 0.35 to 3.7 mgNH3 -N/L, and 1.1 to 3.9 mgNOx -N/L. Comparatively, the pilot achieved effluent (50th percentile/average) of 0.13/0.2 mgP/L, 9.7/8.2 mgNH3 -N/L, and 0.38/3.3 mgNOx -N/L under dynamic influent and environmental conditions. For EBPR process monitoring, P:C ratio data indicated that 0.2-0.4 molP/molC will result in stable EBPR; relatedly, a target design influent volatile fatty acid (VFA):P ratio would exceed 15 mgCOD/mgP. Post-anoxic EBPR was enriched for Nitrobacter spp. at 1.70%-20.27%, with Parcubacteria also dominating; the former is putatively associated with nitritation and the latter is a putative fermenting heterotrophic organism. Post-anoxic specific denitrification rates (SDNRs) (20°C) ranged from 0.70 to 3.10 mgN/gVSS/h; there was a strong correlation (R2 = 0.94) between the SDNR and %Parcubacteria for systems operated at a 20-day solids residence time (SRT). These results suggest that carbon substrate potentially generated by this putative fermenter may enhance post-anoxic EBPR. PRACTITIONER POINTS: Post-anoxic EBPR can achieve effluent of <0.2 mgP/L and <12 mgN/L. The P:C and VFA:P ratios can be predictive for EBPR process monitoring. Post-anoxic EBPR was enriched for Nitrobacter spp. over Nitrospira spp. and also for Parcubacteria, which is a putative fermenting heterotrophic organism. Post-anoxic specific denitrification rates (20°C) ranged from 0.70 to 3.10 mgN/gVSS/h. BLASTn analysis of 16S rDNA PAO primer set was shown to be improved to 93.8% for Ca. Accumulibacter phosphatis and 73.2%-94.0% for all potential PAOs.
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Affiliation(s)
- Erik R Coats
- Department of Civil and Environmental Engineering, University of Idaho, Moscow, Idaho, USA
| | - Felicity J Appel
- Department of Civil and Environmental Engineering, University of Idaho, Moscow, Idaho, USA
- Kimley-Horn, Seattle, Washington, USA
| | - Nick Guho
- Department of Civil and Environmental Engineering, University of Idaho, Moscow, Idaho, USA
- Carollo Engineers, Walnut Creek, California, USA
| | - Cynthia K Brinkman
- Department of Civil and Environmental Engineering, University of Idaho, Moscow, Idaho, USA
| | - Jason Mellin
- Department of Civil and Environmental Engineering, University of Idaho, Moscow, Idaho, USA
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17
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Liu J, Huang J, Li W, Shi Z, Lin Y, Zhou R, Meng J, Tang J, Hou P. Coupled process of in-situ sludge fermentation and riboflavin-mediated nitrogen removal for low carbon wastewater treatment. BIORESOURCE TECHNOLOGY 2022; 363:127928. [PMID: 36096329 DOI: 10.1016/j.biortech.2022.127928] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/03/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Volatile fatty acid recovery from waste activated sludge (WAS) was highly suggested to supplement carbon source for nitrogen removal. However, it was not easy to separate them from the metabolites under the ex-situ fermentation. In this study, in-situ WAS fermentation combined in the denitrification system was established to treat low carbon wastewater (COD/TN = 4), and riboflavin was employed as a redox mediator. This coupled process could simultaneously enhance the WAS fermentation and nitrogen removal, and riboflavin could significantly enrich the fermentative bacteria (Firmicutes phylum), denitrifying bacteria (Denitratisoma genus) and related functional genes (narGHJI, napABC, nirKS, nosZ, norBC), generating more available carbon sources for efficient nitrogen removal. This resulted in the effluent TN (<15 mg/L) satisfying the required discharge standard in China. This study provided new insights into the efficient nitrogen removal from low carbon wastewater, realizing the carbon-neutral operation of new concept wastewater treatment plant in China.
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Affiliation(s)
- Jingya Liu
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Jingang Huang
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China; The Belt and Road Information Research Institute, Hangzhou Dianzi University, Hangzhou 310018, PR China.
| | - Weishuai Li
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Zhuoer Shi
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Yuanyuan Lin
- Zhejiang Province Environmental Engineering Co. Ltd, Hangzhou 310012, PR China
| | - Rongbing Zhou
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Jianfang Meng
- M-U-T Maschinen-Umwelttechnik-Transportanlagen GmbH, Stockerau 2000, Austria
| | - Junhong Tang
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Pingzhi Hou
- The Belt and Road Information Research Institute, Hangzhou Dianzi University, Hangzhou 310018, PR China
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18
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Liu W, Huang W, Cao Z, Ji Y, Liu D, Huang W, Zhu Y, Lei Z. Microalgae simultaneously promote antibiotic removal and antibiotic resistance genes/bacteria attenuation in algal-bacterial granular sludge system. JOURNAL OF HAZARDOUS MATERIALS 2022; 438:129286. [PMID: 35777142 DOI: 10.1016/j.jhazmat.2022.129286] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 04/30/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
This study investigated the effects of microalgae growth on antibiotic removal and the attenuation of antibiotic resistance genes (ARGs)/ARGs host bacteria in algal-bacterial granular sludge (ABGS) system. In the presence of tetracycline (TC) and sulfadiazine (SDZ) mixture (2-4 mg/L), microalgae could grow on bacterial granular sludge (BGS) to form ABGS, with a chlorophyll-a content of 7.68-8.13 mg/g-VSS being achieved. The removal efficiencies of TC and SDZ by ABGS were as high as 79.0 % and 94.0 %, which were 4.3-5.0 % higher than those by BGS. Metagenomic analysis indicated that the relative abundances of TC/SDZ- related ARGs and mobile genetic elements (MGEs) in BGS were 56.1 % and 22.1 % higher than those in ABGS. A total of 26 ARGs were detected from the granules, and they were identified to associate with 46 host bacteria. 13 out of 26 ARGs and 13 out of 46 hosts were shared ARGs and hosts, respectively. The total relative abundance of host bacteria in BGS was 30.8 % higher than that in ABGS. Scenedesmus and Chlorella were the dominant microalgae that may reduce the diversity of ARGs hosts. Overall, ABGS is a promising biotechnology for antibiotic-containing wastewater treatment.
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Affiliation(s)
- Wenhao Liu
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Wenli Huang
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Zhenhua Cao
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yuan Ji
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Dongfang Liu
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Weiwei Huang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Renmin Road, Haikou 570228, China
| | - Yanjing Zhu
- IVL Swedish Environmental Research Institute, Beijing Representative Office, Beijing 100006, China
| | - Zhongfang Lei
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
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19
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Wang H, Wu P, Zheng D, Deng L, Wang W. N-Acyl-Homoserine Lactone (AHL)-Mediated Microalgal-Bacterial Communication Driving Chlorella-Activated Sludge Bacterial Biofloc Formation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:12645-12655. [PMID: 35881886 DOI: 10.1021/acs.est.2c00905] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
N-acyl-homoserine lactones (AHLs) as autoinducers of Gram-negative bacteria for quorum sensing regulation have shown positive effects on the production of aromatic proteins in extracellular polymeric substances (EPSs) during bioflocculation. To investigate the role of AHLs in aromatic protein production, a Chlorella-bacteria system with great bioflocculation was established via fed-batch cultivation. Tryptophan and aromatic proteins as the main compounds in the EPS of bioflocs showed an increasing trend during fed-batch cultivation. The Chlorella cells only secreted tryptophan rather than aromatic proteins during axenic cultivation. N-dodecanoyl-l-homoserine lactone (C12-HSL) was correlated with the flocculation activity and extracellular protein content of bioflocs during fed-batch cultivation. The addition of exogenous C12-HSL enhanced the flocculation activity of the Chlorella-bacteria system and aromatic protein production in the EPS. Chlorella cells sensed exogenous C12-HSL and significantly upregulated the aromatic protein synthesis pathway during axenic cultivation. In addition, vanillin as a quorum-sensing inhibitor suppressed the positive effect of C12-HSL on flocculation activity and aromatic protein production and synthesis. This result indicated that vanillin intercepts the response of Chlorella cells to C12-HSL. Overall, C12-HSL is supposed to be an important signal molecule to achieve communication between Chlorella and Gram-negative bacteria and subsequently induce Chlorella cells to produce aromatic proteins for biofloc formation.
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Affiliation(s)
- Hong Wang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
| | - Peike Wu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Dan Zheng
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Liangwei Deng
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Wenguo Wang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
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20
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Guo Y, Guo L, Jin C, Zhao Y, Gao M, Ji J, She Z, Giesy JP. Comparison of primary and secondary sludge carbon sources derived from hydrolysis or acidogenesis for nitrate reduction and denitrification kinetics: Organics utilization and microbial community shift. ENVIRONMENTAL RESEARCH 2022; 212:113403. [PMID: 35525291 DOI: 10.1016/j.envres.2022.113403] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/23/2022] [Accepted: 04/28/2022] [Indexed: 06/14/2023]
Abstract
Seeking available and economical carbon sources for denitrification process is an intractable issue for wastewater treatment. However, no study compared different types of waste sludge as carbon source from denitrification mechanism, organics utilization and microbial community aspects. In this study, primary and secondary sludge were pretreated by thermophilic bacteria (TB), and its hydrolysis or acidogenic liquid were prepared as carbon sources for denitrification. At C/N of 8-3, the variations of NO3--N and NO2--N were profiled in typical cycles and denitrification kinetics was analyzed. Primary sludge achieved a competitive NOX-N removal efficiency with less dosage than secondary sludge. Fourier transform infrared (FTIR) spectroscopy was introduced to analyze organic composition from functional-group perspective and the utilization of organic matters in different sludge carbon sources was investigated. To further analyze the microbial community shift in different denitrification systems, high-throughput sequencing technology was applied. Results showed that denitrifier Thauera, belonging to Proteobacteria, was predominant, and primary sludge acidogenic liquid enriched Thauera most intensively with relative abundance of 47.3%.
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Affiliation(s)
- Yiding Guo
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China; Key Laboratory of Marine Environmental and Ecology, Ministry of Educatin, Ocean University of China, Qingdao, 266100, China.
| | - Chunji Jin
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yangguo Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mengchun Gao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Junyuan Ji
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
| | - Zonglian She
- College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - John P Giesy
- Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Department of Environmental Science, Baylor University, Waco, TX, USA
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21
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Dai H, Sun Y, Wan D, Abbasi HN, Guo Z, Geng H, Wang X, Chen Y. Simultaneous denitrification and phosphorus removal: A review on the functional strains and activated sludge processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 835:155409. [PMID: 35469879 DOI: 10.1016/j.scitotenv.2022.155409] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 06/14/2023]
Abstract
Eutrophication has attracted extensive attention owing to its harmful effects to the organisms and aquatic environment. Studies on the functional microorganisms with the ability of simultaneously nitrogen (N) and phosphorus (P) removal is of great significance for alleviating eutrophication. Thus far, several strains from various genera have been reported to accomplish simultaneous N and P removal, which is primarily observed in Bacillus, Pseudomonas, Paracoccus, and Arthrobacter. The mechanism of N and P removal by denitrifying P accumulating organisms (DPAOs) is different from the traditional biological N and P removal. The denitrifying P removal (DPR) technology based on the metabolic function of DPAOs can overcome the problem of carbon source competition and sludge age contradiction in traditional biological N and P removal processes and can be applied to the treatment of urban sewage with low C/N ratio. This paper reviews the mechanism of N and P removal by DPAOs from the aspect of the metabolic pathways and enzymatic processes. The research progress on DPR processes is also summarized and elucidated. Further research should focus on the efficient removal of N and P by improving the performance of functional microorganisms and development of new coupling processes. This review can serve as a basis for screening DPAOs with high N and P removal efficiency and developing new DPR processes in the future.
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Affiliation(s)
- Hongliang Dai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Sun
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Dong Wan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Haq Nawaz Abbasi
- Department of Environmental science, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
| | - Zechong Guo
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Hongya Geng
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Xingang Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
| | - Yong Chen
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
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22
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Enhancing nitrogen removal from domestic sewage with low C/N ratio using a biological aerated filter system with internal reflux-coupled intermittent aeration. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Ferro TN, de Carvalho KQ, de Lima MX, Barana AC, Kreutz C, Gauza OR, Passig FH. Influence of HRT and carbon source on the enhancement of nutrient removal in an Anaerobic-Oxic-Anoxic (AOA) system. ENVIRONMENTAL TECHNOLOGY 2022; 43:2478-2491. [PMID: 33502954 DOI: 10.1080/09593330.2021.1882586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
The eutrophication and increase in toxicity promoted by the continuous or abundant supply of nutrients in water bodies threaten the safety of drinking water and human health. In this regard, this study proposes the investigation of wastewater treatment focusing on the simultaneous removal of nitrogen and phosphorus in the anaerobic-oxic-anoxic (AOA) system. The AOA system was operated in three different stages to verify the influence of the external carbon source addition in the anoxic reactor and the reduction of hydraulic retention time (HRT) in the anaerobic and oxic reactors for nutrient removal optimization. Results showed that the best performance of the AOA system on nutrient removal was obtained in Stage 3, with the reduction of the HRT in the anaerobic and oxic reactors (HRT = 4 h) while maintaining HRT of 6.4 h in the anoxic reactor with no addition of the external carbon source. Under these conditions, the average removal efficiencies reached 98% for Chemical Oxygen Demand (COD), 88% for Total Ammonia Nitrogen (TAN), 81% for Total Kjeldahl Nitrogen (TKN), and 70% for Total Phosphorus (TP). The results also demonstrate that the highest phosphorus removal efficiency was achieved in the anoxic reactor, thus indicating the occurrence of denitrifying phosphorous removal by Denitrifying Phosphate Accumulating Organisms (DNPAOs). This configuration was efficient regarding the simultaneous removal of nitrogen and phosphorus; besides, the advantages of this system include robust configuration and excellent performance on the nutrient removal.
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Affiliation(s)
- Thayse Nathalie Ferro
- Environmental Sciences and Technology Graduate Program, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
| | - Karina Querne de Carvalho
- Civil Construction Academic Department, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
| | - Mateus Xavier de Lima
- Civil Engineering Graduate Program, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
| | - Ana Cláudia Barana
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Ponta Grossa, Brazil
| | - Cristiane Kreutz
- Environmental Academic Department, The Federal University of Technology - Paraná (UTFPR), Campo Mourão, Brazil
| | - Olga Regina Gauza
- Chemistry and Biology Academic Department, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
| | - Fernando Hermes Passig
- Chemistry and Biology Academic Department, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil
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24
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Feng Y, Luo S, Zhang Y, Wang S, Peng Y. Enhanced nutrient removal from mainstream sewage via denitrifying dephosphatation, endogenous denitrification and anammox in a novel continuous flow process. BIORESOURCE TECHNOLOGY 2022; 351:127003. [PMID: 35301084 DOI: 10.1016/j.biortech.2022.127003] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/01/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
It is a challenging subject to realize nitrogen and phosphorus elimination synchronously from limited-carbon sewage through conventional biological processes. Herein, a novel continuous flow anaerobic/oxic/anoxic/oxic (AOA-O) process, which integrated denitrifying dephosphatation, endogenous denitrification and anammox in the anoxic zone, was developed to enhance nutrient elimination from low carbon/nitrogen sewage (3.4 in average). After the long-term operation (280 days), a satisfactory nutrient removal performance (effluent PO43--P: 0.2 mg P/L, total inorganic nitrogen (TIN):8.9 mg N/L) was obtained. Mass balance indicated that anammox contributed to 26.1% TIN removal and denitrifying dephosphatation contributed to 25.6% phosphorus removal, respectively. The cooperation of anammox bacteria retained in biofilms and endogenous denitrifying bacteria in flocculent sludge was responsible for the enhanced nutrient removal in the anoxic zone. Dechloromonas carried out phosphorus uptake both under oxic conditions and anoxic conditions. This study can broaden the application prospect of mainstream anammox.
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Affiliation(s)
- Yan Feng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shaoping Luo
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yingxin Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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25
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Su B, Liu Q, Liang H, Zhou X, Zhang Y, Liu G, Qiao Z. Simultaneous partial nitrification, anammox, and denitrification in an upflow microaerobic membrane bioreactor treating middle concentration of ammonia nitrogen wastewater with low COD/TN ratio. CHEMOSPHERE 2022; 295:133832. [PMID: 35124081 DOI: 10.1016/j.chemosphere.2022.133832] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 01/03/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
The rapid start-up and operating characteristics of simultaneous partial nitrification, anammox, and denitrification (SNAD) process was investigated using synthetic wastewater with a low C/N ratio (COD: NH4+-N = 200 mg/L: 200 mg/L) in a novel upflow microaerobic membrane bioreactor (UMMBR). The average removal efficiencies of COD, NH4+-N, and TN in the stable phase were 89%, 96%, and 86%, respectively. Carmine granule, which coexisted with sludge floc, appeared on day 83. The high sludge concentration (12.9-17.2 g/L) and the upflow mode of the UMMBR could establish some anaerobicregions for anammox process. The anammox bacteria and short-cut denitrification (NO2-→N2) bacteria with activities of 4.46 mg NH4+-N/gVSS·h and 2.57 mg NO2--N/gVSS·h contributed TN removal of 39% and 61% on day 129, respectively. High-throughput sequencing analysis revealed that the ammonia-oxidizing archaea (AOA, 49.45% in granule and 17.05% in sludge floc) and ammonia-oxidizing bacterial (AOB, 1.30% in sludge floc) dominated the nitrifying microbial community. Candidatus Jettenia (47.14%) and Denitratisoma (10.92%) mainly existed in granule with positive correlations. Some heterotrophic bacteria (OLB13, SJA-15, 1-20, SBR1031, and SJA-28) in sludge floc benefited system stability and sludge activity and protected Candidatus Jettenia from adverse environments.
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Affiliation(s)
- Bensheng Su
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Qi Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Huili Liang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaohua Zhou
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yuanjie Zhang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Guangqing Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhuangming Qiao
- Shandong Meiquan Environmental Protection Technology CO., Ltd, Shandong, 250002, China
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26
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Gao X, Xu Z, Peng Y, Zhang L, Ding J. The nitrification recovery capacity is the key to enhancing nitrogen removal in the AOA system at low temperatures. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 818:151674. [PMID: 34785216 DOI: 10.1016/j.scitotenv.2021.151674] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 06/13/2023]
Abstract
Anaerobic/aerobic/anoxic (AOA) is suitable for advanced nitrogen removal of low C/N wastewater as an energy-saving process. Investigations of the temperature impact on the AOA process are critical to its application in cold regions or seasons. In this study, the nitrogen removal performance in AOA at low and room temperatures was investigated. The nitrification capacity of the AOA process was recovered at low temperature and the endogenous denitrification performance was enhanced by converting the partial aerobic zone into anoxic. At 15 °C, treating real municipal sewage with a low C/N ratio (3.36), TIN and NH4+-N removal efficiencies of 84.3 ± 6.6% and 97.4 ± 3.3% respectively, were achieved. The oxygen uptake rate test, quantitative PCR, and high-throughput sequencing results indicated that the activity and abundance of ammonia-oxidizing bacteria (AOB) increased at low temperature, which was the key for nitrification capacity recovery. Overall, the recoverability of nitrification capacity in the AOA system made advanced nitrogen removal possible at low temperatures.
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Affiliation(s)
- Xinjie Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Zaizhou Xu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Jing Ding
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
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27
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Ding J, Gao X, Peng Y, Peng Y, Zhang Q, Li X, Wang S. Anaerobic duration optimization improves endogenous denitrification efficiency by glycogen accumulating organisms enhancement. BIORESOURCE TECHNOLOGY 2022; 348:126730. [PMID: 35066129 DOI: 10.1016/j.biortech.2022.126730] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/14/2022] [Accepted: 01/15/2022] [Indexed: 06/14/2023]
Abstract
Without additional carbon sources, a low endogenous denitrification rate (EDNR) is the critical factor limiting its application in postdenitrification systems. This study optimized the quantitative distribution of anaerobic carbon source removal pathways based on chemometrics for the first time and explored the effect of anaerobic carbon conversion on anoxic endogenous denitrification. Results showed that enhancing the intracellular carbon storage of glycogen accumulating organisms (GAOs) by optimizing anaerobic duration can effectively improve the EDNR. The anaerobic stage was proposed to end at the peak concentration of polyhydroxyalkanoates (PHAs). A two-stage endogenous denitrification system was established to explore the long-term operating performance before and after optimizing anaerobic duration. Results showed that the average NO3- removal rate increased by 25%. qPCR and optimized stoichiometric analyses indicated that the relative abundance and intracellular carbon storage proportion of GAOs increased by 67% and 25%, respectively. This study provided an effective strategy to improve postdenitrification efficiency.
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Affiliation(s)
- Jing Ding
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Xinjie Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Yi Peng
- SDIC Xinkai Water Environmental Investment Co. Ltd., Beijing 101101, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China.
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
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28
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Zhang C, Gao F, Wu Y, Xu G, Liu H, Zhang H, Yang F, Xu Y. Small-sized salt-tolerant denitrifying and phosphorus removal aerobic granular sludge cultivated with mariculture waste solids to treat synthetic mariculture wastewater. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Qiu J, Li X, Peng Y, Jiang H. Advanced nitrogen removal from landfill leachate via a two-stage combined process of partial nitrification-Anammox (PNA) and partial denitrification-Anammox (PDA). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 810:151186. [PMID: 34699827 DOI: 10.1016/j.scitotenv.2021.151186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
In this study, a two-stage combined process of partial nitrification-Anammox (PNA) and partial denitrification-Anammox (PDA) was established achieving advanced nitrogen removal from landfill leachate. The PNA sludge used to treat reject water adapted to the leachate in 37 days, resulting in fast start-up of the PNA process with a nitrogen removal rate (NRR) of 0.22 kgN/(m3·d). Partial denitrification (PD) was induced using sodium acetate and proceeded in a stepwise manner using sludge fermentation liquid (SFL), achieving a NO3--N to NO2--N transformation ratio (NTR) of 52.1 ± 1.1% within 16 days. PDA was established via the addition of mature Anammox biofilms. The nitrogen removal efficiency (NRE) of this system was 97.6 ± 1.5%, of which PNA and PDA contributed 74.8 ± 4.0% and 18.7 ± 4.1%, respectively. Nitrosomonas (2.6% in PNA), Thauera (16.0% in PDA) and Candidatus Brocadia (23.0% in PNA, 1.4% in PDA) were dominant in the two-stage system. This study provides valuable and novel insights, supporting the practical application of PNA-PDA processes in landfill sites.
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Affiliation(s)
- Jingang Qiu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China..
| | - Hao Jiang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
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30
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He Q, Liu J, Peng Y, Li X, Zhang Q. Realization of partial nitrification and in-situ anammox in continuous-flow anaerobic/aerobic/anoxic process with side-stream sludge fermentation for real sewage. BIORESOURCE TECHNOLOGY 2022; 346:126520. [PMID: 34896262 DOI: 10.1016/j.biortech.2021.126520] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/02/2021] [Accepted: 12/03/2021] [Indexed: 06/14/2023]
Abstract
A continuous-flow anaerobic/aerobic/anoxic reactor with complete suspended activated sludge using sludge alkaline fermentation products as carbon source was utilized to strengthen nitrogen removal performance for low C/N ratio (<4) wastewater. Long-time performance indicated that the nitrite accumulation rate reached 60.40%, which strengthened the contribution of anammox. The average total inorganic nitrogen removal efficiency improved 19.40%. The abundance of ammonia oxidizing bacteria has not changed, but the abundance of nitrite oxidizing bacteria reduced from 5.79% to 0.69%. Quantitative PCR results demonstrated that the abundance of anammox bacteria has raised by 80.5 times. These results indicated that side-stream sludge alkaline fermentation promoted the mainstream partial nitrification, consequently accelerating the in-situ enrichment of anammox bacteria. No external carbon source dosing and short oxic hydraulic retention time (5.3 h) save energy and reduce consumption significantly in this system.
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Affiliation(s)
- Qiang He
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Jinjin Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
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31
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Chen Y, Zhang Y, Zhang L, Zhang S, Peng Y. Applicability of two-stage anoxic/oxic shortcut nitrogen removal via partial nitrification and partial denitrification for municipal wastewater by adding sludge fermentation products continuously. CHEMOSPHERE 2022; 287:132053. [PMID: 34826887 DOI: 10.1016/j.chemosphere.2021.132053] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/02/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
Partial nitrification and partial denitrification combined with anammox is a promising process for sewage treatment. In this study, real municipal wastewater was treated in a continuous two-stage anoxic/oxic (A/O) reactor. External mixed sludge fermentation products were added in the anoxic zone, simultaneously achieving partial nitrification and partial denitrification and achieving a high and relatively stable accumulation of nitrite. The maximum accumulation rates of NO2--N in A1.2 and A2.1-A2.4 zones of the reactor reached 70% and 61%-37%, respectively, which improved denitrification efficiency and created conditions that supported the coupling of subsequent anammox. The influent nitrogen load of the system was 0.078 kg/(m3•d), and the mean influent and effluent total nitrogen were 51 and 12 mg/L, respectively. The mean total nitrogen removal rate reached 76%. Further analysis revealed that Hyphomicrobium (incomplete denitrifiers) and Nitrosomonas (ammonia oxidizing bacteria) were enriched, which may have facilitated the high nitrite accumulation. Moreover, the batch test showed that adding sludge fermentation during denitrification significantly suppressed nitrite reduction, resulting in the nitrite accumulation.
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Affiliation(s)
- Yao Chen
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China
| | - Ying Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China
| | - Shujun Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China.
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32
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Zheng L, Wang X, Ding A, Yuan D, Tan Q, Xing Y, Xie E. Ecological Insights Into Community Interactions, Assembly Processes and Function in the Denitrifying Phosphorus Removal Activated Sludge Driven by Phosphorus Sources. Front Microbiol 2021; 12:779369. [PMID: 34899660 PMCID: PMC8660105 DOI: 10.3389/fmicb.2021.779369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 10/08/2021] [Indexed: 11/29/2022] Open
Abstract
The microbial characteristics in the wastewater treatment plants (WWTPs) strongly affect their optimal performance and functional stability. However, a cognitive gap remains regarding the characteristics of the microbial community driven by phosphorus sources, especially co-occurrence patterns and community assembly based on phylogenetic group. In this study, 59 denitrifying phosphorus removal (DPR) activated sludge samples were cultivated with phosphorus sources. The results suggested that homogeneous selection accounted for the largest proportion that ranged from 35.82 to 64.48%. Deterministic processes dominated in 12 microbial groups (bins): Candidatus_Accumulibacter and Pseudomonas in these bins belonged to phosphate-accumulating organisms (PAOs). Network analysis revealed that species interactions were intensive in cyclic nucleoside phosphate-influenced microbiota. Function prediction indicated that cyclic nucleoside phosphates increased the activity of enzymes related to denitrification and phosphorus metabolism and increased the α-diversity of microorganism but decreased the diversity of metabolic function. Based on these results, it was assumed that cyclic nucleoside phosphates, rather than inorganic phosphates, are the most available phosphorus source for majority microorganisms in DPR activated sludge. The study revealed the important role of phosphorus source in the construction and assembly of microbial communities and provided new insights about pollutant removal from WWTPs.
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Affiliation(s)
- Lei Zheng
- College of Water Sciences, Beijing Normal University, Beijing, China
| | - Xue Wang
- College of Water Sciences, Beijing Normal University, Beijing, China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing, China
| | - Dongdan Yuan
- College of Water Sciences, Beijing Normal University, Beijing, China
| | - Qiuyang Tan
- College of Water Sciences, Beijing Normal University, Beijing, China
| | - Yuzi Xing
- College of Water Sciences, Beijing Normal University, Beijing, China
| | - En Xie
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China
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33
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Fan Z, Zeng W, Meng Q, Liu H, Liu H, Peng Y. Achieving enhanced biological phosphorus removal utilizing waste activated sludge as sole carbon source and simultaneous sludge reduction in sequencing batch reactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149291. [PMID: 34364268 DOI: 10.1016/j.scitotenv.2021.149291] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/19/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
Achieving enhanced biological phosphorus removal dominated by Tetrasphaera utilizing waste activated sludge (WAS) as carbon source could solve the problems of insufficient carbon source and excessive discharge of WAS in biological phosphorus removal. Up to now, the sludge reduction ability of Tetrasphaera remained largely unknown. Furthermore, the difference between traditional sludge fermentation and sludge fermentation dominated by Tetrasphaera was still unclear. In this study, two different sequencing batch reactors (SBRs) were operated. WAS from SBR-parent was utilized as sole carbon source to enrich Tetrasphaera with the relative abundance of 91.9% in SBR-Tetrasphaera. PO43--P removal and sludge reduction could simultaneously be achieved. The effluent concentration of PO43--P was 0, and the sludge reduction efficiency reached about 44.14% without pretreatment of sludge. Cell integrity detected by flow cytometry, the increase of DNA concentration in the sludge supernatant and decrease of particle size of activated sludge indicated that cell death and lysis occurred in sludge reduction dominated by Tetrasphaera. Stable structure of activated sludge was also damaged in this process, which led to the sludge reduction. By analyzing the excitation-emission matrix spectra of extracellular polymeric substances and the changes of carbohydrate and protein concentration, this study proved that slowly biodegradable organics (e.g., soluble microbial byproduct, tyrosine and tryptophan aromatic protein) could be better hydrolyzed and acidized to volatile fatty acids (VFAs) in sludge fermentation dominated by Tetrasphaera than traditional sludge fermentation, which provided carbon source for biological nutrients removal and saved operation cost in wastewater treatment.
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Affiliation(s)
- Zhiwei Fan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China
| | - Wei Zeng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China.
| | - Qingan Meng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China
| | - Hong Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China
| | - Hongjun Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, Beijing 100124, China
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Liu J, Zhang L, Qiu S, He Q, Zhang Q, Peng Y, Peng Y. Insight into the mechanism of nitritation establishment through external fermented sludge addition. BIORESOURCE TECHNOLOGY 2021; 341:125763. [PMID: 34411940 DOI: 10.1016/j.biortech.2021.125763] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/08/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
In this study, a novel strategy for nitritation establishment through external fermented sludge addition is proposed. The nitrifying activities under various fermentation times were assessed; batch tests results revealed that the decay rate of nitrite oxidizing bacteria (0.53 ± 0.08 d-1) was much higher than that of ammonia oxidizing bacteria (0.15 ± 0.04 d-1), during alkaline fermentation with high endogenous free ammonia concentrations (0.57-138.79 mg·L-1). The long-term effects of fermented sludge addition were constantly monitored in an anaerobic/oxic/anoxic sequencing batch reactor. During 60 days of operation, the nitrite accumulation rate reached above 90% and could be maintained stably. Total inorganic nitrogen removal achieved 94.7%, with an average external sludge reduction rate of 61.3%, after incorporation of the sludge addition. Illumina MiSeq sequencing demonstrated that nitrite oxidizing bacteria were successfully eliminated and the relative abundance of ammonia oxidizing bacteria remained at 0.39%, resulting in nitrite accumulation.
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Affiliation(s)
- Jinjin Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
| | - Shengjie Qiu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Qiang He
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yi Peng
- SDIC Xinkai Water Environment Investment Co., Ltd, Beijing 101100, PR China
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35
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Cai Z, Zhou L, Liu L, Wang D, Ren W, Long H, Zhang X, Xie Z. Bacterial epiphyte and endophyte communities of seagrass Thalassia hemprichii: the impact of feed extract solution. ENVIRONMENTAL MICROBIOLOGY REPORTS 2021; 13:757-772. [PMID: 34713580 DOI: 10.1111/1758-2229.13019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 09/05/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
The global seagrass bed ecosystem acts as a natural ecological barrier in the littoral coastal zone. In recent years, this ecosystem has suffered from serious eutrophication and destruction caused by the continuous expansion of aquaculture. However, our understanding of the influence of aquaculture on the bacterial community remains limited. In this study, we used 16S amplicon sequencing to evaluate the impact of aquaculture feed extract solution on the composition and function of bacterial epiphytes and endophyte communities of the core seagrass from the seagrass bed ecosystem in Hainan, Thalassia hemprichii. The feed extract solution was the main factor that significantly affected the bacterial epiphyte and endophyte community structure of seagrass leaves but had no marked effect on alpha diversity was observed. Additionally, the bacterial epiphyte and endophyte community of the T. hemprichii leaves alleviated the effects of organic matter, sulfide, and nutrients caused by aquaculture wastewater. The feed extract solution promoted the proliferation of Bacteroidales, Vibrio, Desulfobulbaceae, Desulfobacteraceae, Pseudoalteromonas, Paludibacter, Marinomonas, and Pseudomonas in the leaves and root of T. hemprichii, which can effectively improve the digestibility of eutrophication. In fact, Desulfobacteraceae and Desulfobulbaceae can reduce sulfate to sulfide and oxidize sulfide to sulfur within seagrass, indicating that the increase in Desulfobulbaceae and Desulfobacteraceae facilitated the accumulation of sulfide with the treatment of feed extract solution, which may be the reason for the degradation of seagrass caused by aquaculture wastewater containing high concentrations of organic pollutants. These results suggest that although seagrass beds can withstand low concentrations of aquaculture pollutants, sulfide emissions should be minimized.
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Affiliation(s)
- Zefu Cai
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan Province, 571126, China
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Hainan University, Haikou, Hainan Province, 570228, China
- College of Marine Sciences, Hainan University, Haikou, Hainan Province, 570228, China
| | - Lei Zhou
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Hainan University, Haikou, Hainan Province, 570228, China
- College of Marine Sciences, Hainan University, Haikou, Hainan Province, 570228, China
| | - Lihua Liu
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Hainan University, Haikou, Hainan Province, 570228, China
- College of Marine Sciences, Hainan University, Haikou, Hainan Province, 570228, China
| | - Daoru Wang
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan Province, 571126, China
| | - Wei Ren
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Hainan University, Haikou, Hainan Province, 570228, China
- College of Marine Sciences, Hainan University, Haikou, Hainan Province, 570228, China
| | - Hao Long
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
| | - Xiang Zhang
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Hainan University, Haikou, Hainan Province, 570228, China
- College of Marine Sciences, Hainan University, Haikou, Hainan Province, 570228, China
| | - Zhenyu Xie
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, Hainan Province, 570228, China
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, Hainan University, Haikou, Hainan Province, 570228, China
- College of Marine Sciences, Hainan University, Haikou, Hainan Province, 570228, China
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36
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Shuai J, Hu X, Wang B, Lyu W, Chen R, Guo W, Wang H, Zhou D. Response of aerobic sludge to AHL-mediated QS: Granulation, simultaneous nitrogen and phosphorus removal performance. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.04.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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37
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Cui H, Zhang L, Zhang Q, Li X, Huang Y, Peng Y. Advanced nitrogen removal from low C/N municipal wastewater by combining partial nitrification-anammox and endogenous partial denitrification-anammox (PN/A-EPD/A) process in a single-stage reactor. BIORESOURCE TECHNOLOGY 2021; 339:125501. [PMID: 34303093 DOI: 10.1016/j.biortech.2021.125501] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 06/29/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
In this study, an innovative partial nitrification-anammox (PN/A) and endogenous partial denitrification-anammox (EPD/A) process was developed in a single-stage integrated fixed film activated sludge sequencing batch reactor (IFAS-SBR) treating real municipal wastewater with C/N ratio below 3.2. Enhanced efficiency of total nitrogen (TN) removal reached 90.1% with low HRT of 12 h and DO of 0.4 ± 0.1 mg/L. Detailed nitrogen removal mechanism analysis of typical cycle revealed that 89.9% of TN was eliminated through anammox pathway. Anammox bacteria (Candidatus Brocadia) and endogenous denitrifying bacteria (Candidatus Competibacter) were abundant both in biofilms and suspended sludge, meanwhile ammonium-oxidizing bacteria has outcompeted nitrite-oxidizing bacteria, which all favored the synergistic effect of anammox with PN and EPD and contributed to the improvement of nitrogen removal. Overall, the above results confirmed that combined PN/A and EPD/A process is a reliable and efficient alternative for mainstream anammox process.
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Affiliation(s)
- Huihui Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Yu Huang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China; Jiangsu Yulong Environmental Protection Co., Ltd, No. 6 Huahui Rd., E.P. Industrial Park, Gaocheng Town, Yixing 214214, Jiangsu, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China.
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38
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Liu J, Peng Y, Qiu S, Wu L, Xue X, Li L, Zhang L. Superior nitrogen removal and sludge reduction in a suspended sludge system with in-situ enriching anammox bacteria for real sewage treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 793:148669. [PMID: 34328973 DOI: 10.1016/j.scitotenv.2021.148669] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/20/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Mainstream partial anammox provides a cost- and energy-efficient alternative for wastewater treatment. This study provided a new strategy to achieve mainstream partial anammox in a single-stage suspended sludge system. The novel method coupling external excess sludge fermentation with simultaneous partial nitritation-anammox-denitrification process (SF-SPNAD) was established for 202 days in an anaerobic-aerobic-anoxic sequencing batch reactor (AOA-SBR) with real sewage and actual sludge fermentation products. Under the condition of low DO (0.6 ± 0.2 mg/L), short oxic and long anoxic hydraulic retention time (HRToxic = 6.5 h, HRTanoxic = 8 h), the average total inorganic nitrogen (TIN) concentration in the influent and effluent during 110-day operation were 61.0 and 3.4 mg/L, respectively, and the TIN removal efficiency was 94.56%. Under the inhibitory effect of continuous sludge fermentation products addition, nitrite accumulation ratio reached 99.1% and the external sludge reduction ratio reached 38.75%. 15N-stable isotope tracing tests showed the great potential of nitrogen removal by anammox pathway in the system. High-throughput sequencing confirmed that CandidatusBrocadia (not detected to 0.50%) and CandidatusKuenenia (not detected to 0.06%) were successfully in-situ enriched. Nitrogen conversion pathways based on stoichiometry and cycle tests show that 34.69% of the TIN removal was obtained by simultaneous nitritation denitrification and anammox under oxic stage and 35.21% of the TIN removal was carried out by anammox under anoxic stage. Overall, the SF-SPNAD process provides a new possibility for coupling autotrophic and heterotrophic nitrogen removal with excess sludge utilization.
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Affiliation(s)
- Jinjin Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shengjie Qiu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Lei Wu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiaofei Xue
- Beijing Enterprises Water Group Limited (BEWG), Poly Int Plaza T3, Zone7, Beijing 100102, PR China
| | - Lingyun Li
- Beijing Enterprises Water Group Limited (BEWG), Poly Int Plaza T3, Zone7, Beijing 100102, PR China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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39
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Zheng K, Li H, Wang S, Wang Y, Li A, Feng X, Li J. Enhanced proteins and amino acids production based on ammonia nitrogen assimilation and sludge increment by the integration of bioadsorption with anaerobic-anoxic-oxic (AAO) process. CHEMOSPHERE 2021; 280:130721. [PMID: 33962293 DOI: 10.1016/j.chemosphere.2021.130721] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/20/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Poor effect of contaminants removal efficiency and low organic matter content of activated sludge are common in wastewater treatment plants (WWTPs) in China due to the low-strength wastewater. An anaerobic-anoxic-oxic (AAO) and an adsorption/AAO (A/AAO) combined system were established simultaneously to conduct a comparative study for realizing the conversion of carbon source in influent and the enrichment and recovery of proteins and amino acids through the assimilation of ammonia nitrogen. The experimental results showed that 63.5% of the organic matter in influent was adsorbed and flocculated in adsorption process, and the removal rates of chemical oxygen demand, total nitrogen and total phosphorus in A/AAO process were 88.7%, 77.1%, and 93.0% respectively, which were remarkably better than those in AAO process owing to the addition of improved carbon source. Ammonia assimilation rate of A/AAO process was 26.7% higher than that of AAO process, which implied that the ammonia used to synthesize sludge protein was prominently increased. Furthermore, intracellular proteins and amino acids in A/AAO process were 20% higher than those of AAO process, and the quality was equivalent with fish meal or soybean meal as feed. In addition, the microbial community analysis based on 16S rDNA was conducted. Dechloromonas, Zoogloea, Nitrospira, and Flavobacterium were the main genera, and played important roles in nutrient removal and ammonia nitrogen assimilation. The integration of adsorption process was significant to low-strength wastewater treatment and the improvement of excess sludge quality, which is a prospective inspiration for the resource recovery-based wastewater treatment process.
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Affiliation(s)
- Kaikai Zheng
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - Huaibo Li
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - Shuo Wang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu College of Water Treatment Technology and Material Collaborative Innovation Center, Suzhou, 215009, China.
| | - Yan Wang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - Aimin Li
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - Xuan Feng
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - Ji Li
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu College of Water Treatment Technology and Material Collaborative Innovation Center, Suzhou, 215009, China.
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40
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Xiao H, Peng Y, Zhang Q, Liu Y. Pre-anaerobic treatment enhanced partial nitrification start-up coupled with anammox for advanced nitrogen removal from low C/N domestic wastewater. BIORESOURCE TECHNOLOGY 2021; 337:125434. [PMID: 34320733 DOI: 10.1016/j.biortech.2021.125434] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/13/2021] [Accepted: 06/16/2021] [Indexed: 06/13/2023]
Abstract
A modified two-stage partial nitrification/anammox (PN/A) process with short aerobic HRT of 5.7 h was established and realized advanced nitrogen removal from domestic wastewater. The first process was partial nitrification in the PN-SBR, the initiation and stable maintenance of partial nitrification was achieved by pre-anaerobic treatment without inoculation or addition of inhibitor, nitrite accumulation rate was over 90% and maintained over 200 days, meanwhile pre-anaerobic improved the storage of endogenous carbon sources to enhance the nitrogen removal efficiency. The second process was anammox in the AMX-SBR, which was fed with the effluent of PN-SBR, the effluent total inorganic nitrogen was below 5 mgN/L, nitrogen removal efficiency reached 92.06%. Furthermore, Candidatus-Brocadia was enriched after treating domestic sewage with low ammonia from 0.02% to 0.23%.This study demonstrated the feasibility of starting and maintaining partial nitrification by pre-anaerobic treatment and the feasibility of nitrogen removal by coupling simultaneous-nitrification-denitrification with anammox to treat actual municipal sewage.
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Affiliation(s)
- Haike Xiao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China.
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Ying Liu
- Zhongshan Public Utilities Water Co. Ltd., Zhongshan 528400,China
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41
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Zhang F, Peng Y, Wang Z, Jiang H, Ren S, Qiu J. Achieving synergetic treatment of sludge supernatant, waste activated sludge and secondary effluent for wastewater treatment plants (WWTPs) sustainable development. BIORESOURCE TECHNOLOGY 2021; 337:125416. [PMID: 34320732 DOI: 10.1016/j.biortech.2021.125416] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/09/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
A novel process that combines partial nitrification, fermentation and Anammox-partial denitrification (NFAD) was proposed to co-treat ammonia rich sludge supernatant (NH4+-N = 1194.1 mg/L), external WAS (MLSS = 22092.6 mg/L) and WWTP secondary effluent (NO3--N = 58.6 mg/L). Three separated reactors were used for partial nitrification (PN-SBR), integrated fermentation and denitrification (IFD-SBR) and combined Anammox-partial denitrification (AD-UASB), respectively. The process resulted in excellent nitrogen removal efficiency (NRE) of 98.7%, external sludge reduction efficiency (SRE) of 44.6% and external sludge reduction rate of 4.1 kg/m3 after 200 days of continuous operation. IFD-SBR and AD-UASB contributed towards 89.4% and 9.2% nitrogen removal, respectively. In AD-UASB, cooperation between Anammox bacteria (4.1% Candidatus Brocadia) and partial denitrifying bacteria (3.2% Thauera) resulted in significant stability of Anammox pathway, which contributed up to 84.1% nitrogen removal in the combined Anammox-partial denitrification process. NFAD saved up to 100% organic resource demand and 25% of aeration consumption compared with the traditional nitrification-denitrification process.
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Affiliation(s)
- Fangzhai Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
| | - Zhong Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Hao Jiang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shang Ren
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Jingang Qiu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
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42
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Jiang H, Wang Z, Ren S, Qiu J, Li X, Peng Y. Culturing sludge fermentation liquid-driven partial denitrification in two-stage Anammox process to realize advanced nitrogen removal from mature landfill leachate. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125568. [PMID: 33773256 DOI: 10.1016/j.jhazmat.2021.125568] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 02/16/2021] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
The two-stage partial nitrification (PN)-Anammox process, during long term treatment of high-ammonia nitrogen leachate, faces challenges such as the adaptation of nitrite oxidation bacteria (NOB) and failure of real-time control of pH. Resultant instabilities including NH4+-N and NO3--N accumulation were overcome by culturing sludge fermentation liquid (SFL)-driven partial denitrification (PD) in situ in the Anammox process. Biodegradation of slowly biodegradable organics (SBO) in SFL created organics restriction condition, which limited the activity of denitrification bacteria and achieved its balance with Anammox bacteria. Produced NO3--N is reduced to NO2--N through PD, which further improved the removal of NH4+-N through Anammox. NO2--N was utilized timely by Anammox bacteria, which avoid further reduction of NO2--N to N2, and result in a high nitrate to nitrite transformation ratio (NTR) of 93.3%. Satisfactory nitrogen removal efficiency (NRE) and nitrogen removal rate (NRR) of 99.6% and 822.0 ± 9.0 g N/(m3∙d) were obtained, respectively. Key genera related to degradation of SBO, PD and Anammox were enriched. The value of narG/(nirK+nirS) increased from 0.05 on day 1-0.15 on day 250. Combining SFL-driven PD with two-stage Anammox process provided a novel insight for applying this process to realize advanced nitrogen removal in practical engineering.
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Affiliation(s)
- Hao Jiang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Zhong Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shang Ren
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Jingang Qiu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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43
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Hu Z, Shi X, Jiang H. Correlating the chemical properties and bioavailability of dissolved organic matter released from hydrochar of walnut shells. CHEMOSPHERE 2021; 275:130003. [PMID: 33639550 DOI: 10.1016/j.chemosphere.2021.130003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/13/2021] [Accepted: 02/13/2021] [Indexed: 06/12/2023]
Abstract
Large amounts of lignocellulosic biomass are discarded, whereas the carbon source of sewage is deficient. This situation greatly impairs the efficiency of wastewater treatment. To address this concern, we evaluate the feasibility of using hydrochar as a potential carbon source by systematically investigating the effects of hydrothermal carbonization (HTC) conditions on the composition, content, and chemical structure of dissolved organic matter (DOM) released from hydrochar. Results show that the most important factor that affects the properties of hydrochar and DOM is temperature, followed by heating rate. Under optimal HTC conditions, the growth of Bacillus subtilis increased by 18.32% in hydrochar aqueous solution in comparison with the 6.64% growth of the untreated biomass group. Excitation emission matrix-parallel factor analysis and UV-vis analyses confirm that the DOM released by hydrochar produced at a low temperature mainly contains protein substances, which promote the growth of microorganisms. The DOM released by hydrochar at a high temperature mainly contains humic substances with an aromatic structure; such substances are toxic to microorganisms. This study demonstrates that hydrochar obtained under optimized conditions can be a potential carbon source of wastewater treatment plants.
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Affiliation(s)
- Ziying Hu
- Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resource and Environmental Engineering, Anhui University, Hefei, 230601, China
| | - Xianyang Shi
- Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resource and Environmental Engineering, Anhui University, Hefei, 230601, China.
| | - Hong Jiang
- Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
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44
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Feng Y, Peng Y, Wang B, Liu B, Li X. A continuous plug-flow anaerobic/aerobic/anoxic/aerobic (AOAO) process treating low COD/TIN domestic sewage: Realization of partial nitrification and extremely advanced nitrogen removal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:145387. [PMID: 33548712 DOI: 10.1016/j.scitotenv.2021.145387] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 01/03/2021] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
The realization of stable partial nitrification and advanced nitrogen removal are not acquired effectively in conventional pre-denitrification biological nitrogen removal processes treating domestic sewage. Herein, a novel anaerobic/aerobic/anoxic/aerobic (AOAO) continuous plug-flow reactor, characterized with double sludge reflux and a bypass of anaerobic mixed liquor conveyed to anoxic zone, was first constructed to realize stable partial nitrification in treating domestic sewage. The alternating anoxic/aerobic conditions and longer anoxic sludge retention time might be responsible for the partial nitrification. Nitrite accumulation ratio reached 89.3 ± 3.3% with the maximum activity ratio of AOB to NOB increasing from 0.72 to 8.17. A content total inorganic nitrogen (TIN) removal efficiency (93.7 ± 2.2%) and effluent TIN concentration (2.9 ± 0.9 mg N/L) were obtained after 238 days' operation. Specifically, nitrogen balance of the typical cycle showed that about 30.1% of TIN was removed through simultaneous partial nitrification and denitrification (SND) in aerobic zone and 48.2% by endogenous denitrification in anoxic zone. The AOAO process is an economic treatment for domestic sewage with aerobic hydraulic retention time (HRT) of 4 h.
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Affiliation(s)
- Yan Feng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
| | - Bo Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Bo Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
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45
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Peng Z, Jiang K, Lou T, Niu N, Wang J. Enhanced denitrification of secondary effluent using composite solid carbon source based on agricultural wastes and synthetic polymers. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:886-893. [PMID: 33617495 DOI: 10.2166/wst.2021.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Solid-phase denitrification is a promising approach to enhance nitrate removal. In this work, polybutylene succinate (PBS) and peanut shell (PS) (with crosslinked polyvinyl alcohol-sodium alginate (PVA-SA) as carrier) were used to prepare a composite solid carbon source (3P) to denitrify the secondary effluent. The results showed that for carbon release performance, 3P had not only a large release of organics, like PS, but also the excellent sustainability of PBS. Among the short chain fatty acids released by PBS, PS, PVA-SA and 3P, the percentages of acetic acid were 59.42%, 72.54%, 72.29% and 92.11%, respectively. When 3P was used as external carbon source, denitrification performance could be enhanced with effluent dissolved organic carbon lower than 20 mg/L. The prepared 3P could improve denitrification, from both microbial and kinetic aspects. The relative abundance of Gammaproteobacteria increased from 39.32% to 43.58%, and the half saturation constant of the fitting Monod equation was 21.28 mg/L. The prepared 3P is an ideal carbon source for secondary effluent denitrification. Using multiple crosslinking methods to produce carrier is an effective way to show the properties of each material.
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Affiliation(s)
- Zhaoxu Peng
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail:
| | - Kun Jiang
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail:
| | - Tianyu Lou
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail:
| | - Ningqi Niu
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail:
| | - Ju Wang
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail:
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46
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Xiong R, Yu X, Zhang Y, Peng Z, Yu L, Cheng L, Li T. Comparison of agricultural wastes and synthetic macromolecules as solid carbon source in treating low carbon nitrogen wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 739:139885. [PMID: 32534311 DOI: 10.1016/j.scitotenv.2020.139885] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/31/2020] [Accepted: 05/31/2020] [Indexed: 06/11/2023]
Abstract
This paper investigated the feasibility of using agricultural wastes and synthetic macromolecules as solid carbon sources and studied the effects of improvement of denitrification by the selected agricultural wastes. The carbon release capacity and denitrification performance of corncob (CC), peanut shell (PS), obsolescent rice (OR) and polycaprolactone (PCL), poly butylene succinate (PBS), polyvinyl alcohol sodium alginate (PVA-SA) were systematically analyzed. The results showed that for each carbon source, the first-order kinetic equation was basically followed during the carbon release process. PVA-SA, CC and PS had higher carbon release capacity with accumulative dissolved organic carbon (DOC) of 16.22-20.63 mg·g-1 and chemical oxygen demand (COD) of 100.86-134.10 mg·g-1. Correspondingly, they showed excellent denitrification performance with almost no residual NO3--N, and the denitrification process well followed the Monod equation. PCL, PBS and OR had lower carbon release capacity with accumulative DOC of 2.06-3.14 mg·g-1 and COD of 13.29-24.13 mg·g-1, respectively. Nevertheless, these materials can also improve the denitrification performance, with the residual NO3--N in the range of 6.02-6.36 mg·L-1, and the effluent DOC was in the range of 10-15 mg·L-1. Synthetic polymers are more suitable for nitrogen removal in groundwater treatment, while agricultural wastes are ideal carbon sources for secondary effluent treatment.
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Affiliation(s)
- Rui Xiong
- Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
| | - Xinxiao Yu
- Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China.
| | - Yonge Zhang
- Institute of Sediment Research, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
| | - Zhaoxu Peng
- School of Water Conservancy & Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Luji Yu
- School of Water Conservancy & Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Lulu Cheng
- School of Water Conservancy & Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Tingmei Li
- Research Center for Environmental Policy Planning & Assessment of Zhengzhou University, Zhengzhou 450002, China
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47
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Xiang Y, Shao Z, Chai H, Ji F, He Q. Functional microorganisms and enzymes related nitrogen cycle in the biofilm performing simultaneous nitrification and denitrification. BIORESOURCE TECHNOLOGY 2020; 314:123697. [PMID: 32593105 DOI: 10.1016/j.biortech.2020.123697] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/11/2020] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
Simultaneous nitrification and denitrification (SND) is a potential energy-saving process in wastewater treatment while the nitrogen removal mechanism is still unclear due to the lack of information about the functional microbes and enzymes. Sequencing batch biofilm reactors were implemented to achieve efficient SND. Eight nitrogen removal related microorganisms out of the top abundant 20 microbial community and reference species were used to construct a phylogenetic tree. Functional enzymes and modules analysis were investigated to reveal the SND pathway: in the aerobic part of the biofilm, ammonia oxidation was catalyzed by complete ammonia oxidizers while in the inner anoxic part, denitrification, dissimilatory nitrate reduction (DNRA) and nitrogen fixation (NF) cooperated to stimulate nitrate removal. These results provide a practical aeration control strategy to achieve SND and indicate that DNRA and NF are important nitrogen removal pathways that should not be ignored in the SND mechanism.
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Affiliation(s)
- Yu Xiang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Zhiyu Shao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Hongxiang Chai
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
| | - Fangying Ji
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Qiang He
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
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48
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Yan X, Zheng S, Huo Z, Shi B, Huang J, Yang J, Ma J, Han Y, Wang Y, Cheng K, Feng J, Sun J. Effects of exogenous N-acyl-homoserine lactones on nutrient removal, sludge properties and microbial community structures during activated sludge process. CHEMOSPHERE 2020; 255:126945. [PMID: 32388260 DOI: 10.1016/j.chemosphere.2020.126945] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
This study investigated the effects of exogenous N-acyl-homoserine lactone (AHL) signal molecules, N-hexanoyl-l-homoserine lactone (C6-HSL) and N-octanoyl-l-homoserine lactone (C8-HSL), on treatment performance, sludge properties and microbial community structures in activated sludge systems. Results showed that the nitrification and denitrification efficiencies were enhanced with the addition of signal molecules. The particle size, irregularity, and internal mass transfer resistance of activated sludge flocs (ASFs) increased, primarily because dosing AHLs led to a content increase and chemical composition variation of extracellular polymeric substances (EPS) in sludge. Microbial analysis indicated an increase in both the bacterial richness and diversity of the systems. The relative abundances of the key functional groups, including bacteria related to C and N removal and EPS production, varied correspondingly. This study presents an insight into the comprehensive understanding of the effects of AHL-based quorum sensing on activated sludge treatment process.
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Affiliation(s)
- Xu Yan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China.
| | - Shikan Zheng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Zhaoman Huo
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Bowen Shi
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jiajun Huang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jie Yang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jiahui Ma
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Yunping Han
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yan Wang
- School of Public Health, Xinxiang Medical University, Xinxiang, 453003, China
| | - Ke Cheng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jinglan Feng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jianhui Sun
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
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49
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Kuang Y, Gao Y, Zhang J, Zhao J, Luo S, Zhang D, Lu C, Sun Y. Effect of initial pH on the sludge fermentation performance enhanced by aged refuse at low temperature of 10 °C. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:31468-31476. [PMID: 32488705 DOI: 10.1007/s11356-020-09306-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
The efficiency of anaerobic fermentation of waste activated sludge (WAS) under low-temperature condition is usually low. This work reported a new strategy to enhance the low-temperature fermentation of WAS by using aged refuse (AR), and explored the effect of initial pH 4 till pH 12 on the production of short-chain fatty acid (SCFA) from AR-enhanced sludge fermentation. The results showed that AR improved WAS fermentation under low-temperature condition (10 °C), and the maximum accumulation of SCFA was 75.6 ± 3.5 mg/g, which was significantly higher than that of the blank (without AR). In addition, when the initial pH was 7, the maximum yield of methane was 102.2 ± 4.8 mL/g, whereas when the initial pH was 11, the maximum yield of SCFA was 85.6 ± 2.8 mg/g. Weak acid or alkali pH benefited hydrolysis and acidification of WAS, but inhibited methanogenesis. The release of NH4+-N and phosphate in a strong alkaline environment (pH 11 and 12) was lower than that in other alkaline environments (pH 10).
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Affiliation(s)
- Yan Kuang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China
| | - Ying Gao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China
| | - Jing Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China
| | - Jianwei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China.
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China.
| | - Siyi Luo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
| | - Dalei Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China
| | - Chenggang Lu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China
| | - Yingjie Sun
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, People's Republic of China
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, People's Republic of China
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50
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Liu W, Yang H, Ye J, Luo J, Li YY, Liu J. Short-chain fatty acids recovery from sewage sludge via acidogenic fermentation as a carbon source for denitrification: A review. BIORESOURCE TECHNOLOGY 2020; 311:123446. [PMID: 32402992 DOI: 10.1016/j.biortech.2020.123446] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 06/11/2023]
Abstract
Wastewater treatment plants face the problem of a shortage of carbon source for denitrification. Acidogenic fermentation is an effective method for recovering short-chain fatty acids (SCFAs) as a carbon source from sewage sludge. Herein, the most recent advances in SCFAs production from primary sludge and waste activated sludge are systematically summarised and discussed. New technologies and problems pertaining to the improvement in SCFAs availability in fermentation liquids, including removal of ammoniacal nitrogen and phosphate and extraction of SCFAs from fermentation liquids, are analysed and evaluated. Furthermore, studies on the use of recovered SCFAs as a carbon source for denitrification are reviewed. Based on the above summarisation and discussion, some conclusions as well as perspectives on future studies and practical applications are presented. In particular, the recovery of carbon source/bioenergy from sewage sludge must be optimised considering nutrient removal/recovery simultaneously.
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Affiliation(s)
- Wen Liu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Huan Yang
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Jiongjiong Ye
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Jinghuan Luo
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Yu-You Li
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Jianyong Liu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China.
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