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Ji J, Zhao Y, Bai Z, Qin J, Yang H, Hu F, Peng Z, Jin B, Yang X. Robustness of the synergistic partial-denitrification, anammox, and fermentation process for treating domestic and nitrate wastewaters under fluctuating C/N ratios. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 355:120547. [PMID: 38452621 DOI: 10.1016/j.jenvman.2024.120547] [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: 12/21/2023] [Revised: 01/18/2024] [Accepted: 03/02/2024] [Indexed: 03/09/2024]
Abstract
The synergistic partial-denitrification, anammox, and fermentation (SPDAF) process presents a promising solution to treat domestic and nitrate wastewaters. However, its capability to handle fluctuating C/N ratios (the ratios of COD to total inorganic nitrogen) in practical applications remains uncertain. In this study, the SPDAF process was operated for 236 days with C/N ratios of 0.7-3.5, and a high and stable efficiency of nitrogen removal (84.9 ± 7.8%) was achieved. The denitrification and anammox contributions were 6.1 ± 7.1% and 93.9 ± 7.1%, respectively. Batch tests highlighted the pivotal role of in situ fermentation at low biodegradable chemical oxygen demand (BCOD)/NO3- ratios. As the BCOD/NO3- ratios increased from 0 to 6, the NH4+ and NO3- removal rates increased, while the anammox contribution decreased from 100% to 80.1% but remained the primary pathway of nitrogen removal. The cooperation and balanced growth of denitrifying bacteria, anammox bacteria, and fermentation bacteria contributed to the system's robustness under fluctuating C/N ratios.
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Affiliation(s)
- Jiantao Ji
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Ying Zhao
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Zhixuan Bai
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Jing Qin
- School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou, 450001, China
| | - Haosen Yang
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Feiyue Hu
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Zhaoxu Peng
- School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou, 450001, China
| | - Baodan Jin
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, China
| | - Xiaoxuan Yang
- College of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China; School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471000, China.
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2
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Jia L, Cheng X, Fang L, Huang X. Nitrogen removal in improved subsurface wastewater infiltration system: Mechanism, microbial indicators and the limitation of phosphorus. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 335:117456. [PMID: 36822044 DOI: 10.1016/j.jenvman.2023.117456] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/25/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
To enhance the nitrogen removal capacity, scrap iron filings and Si-Al porous clay mineral material (PCMW) was used to improve a subsurface wastewater infiltration system (SWIS). The results showed TN and NH4+-N removal efficiencies of improved SWIS were 20.72% and 5.49% higher than those of the control SWIS, respectively. Based on the response of the removal performance, microbial community and function analysis of 16s rRNA amplicon sequencing results, the amending soil matrix substantially enriched the nitrogen removal bacteria (Rhizobiales_Incertae_Sedis and Gemmatimonadaceae), and significantly improved the activities of key enzymes (Hao, NasAB, NarGHI, NirK, NorBC, NirA and NirBD), particularly at co-occurrence zone of nitrification and denitrification (70-130 cm depth). The amending soil matrix not only extended the growth space of microbes, but also provided additional electrons and carbon sources for denitrifying bacteria by regulating the structure and function of the microbial community. In addition, amending soil matrix could enhance phosphate metabolism genes and phosphate solubilizing microbes in the denitrification zone by increasing the phosphorus source, thus strengthening nitrogen metabolism. Nitrospiraceae, Rhizobiales_Incertae_Sedis and Gemmatimonadaceae related to nitrogen removal and Bacillaceae with phosphate-solubilizing ability could be used as microbial indicators of nitrogen removal in SWISs. The reciprocal action of environmental on microbial characteristics exhibited microbial functional were related to DO, Fe2+, TOC, TP, TN, NH4+-N and NO3--N. Those could be used as physicochemical and biological indicators for application and monitoring of SWIS. In conclusion, this study provided a low-cost and efficient enhancement approach for the application of SWIS in decentralized domestic sewage treatment, and furnished theoretical support for subsequent applications.
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Affiliation(s)
- Liping Jia
- College of Chemistry and Environmental Science, Minnan Normal University, Zhangzhou, 363000, China
| | - Xuelin Cheng
- College of Chemistry and Environmental Science, Minnan Normal University, Zhangzhou, 363000, China
| | - Linchuan Fang
- CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China
| | - Xuguang Huang
- College of Chemistry and Environmental Science, Minnan Normal University, Zhangzhou, 363000, China.
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3
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Pounsamy M, Karmegam PM, Ganesan S. Combined application of microbes immobilized carbon reactor and the reactive struvite system for the management of tannery deliming wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:47699-47711. [PMID: 36745345 DOI: 10.1007/s11356-023-25702-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/30/2023] [Indexed: 02/07/2023]
Abstract
This present study investigated the removal of COD and ammoniacal nitrogen (NH4+-N) from tannery deliming wastewater (TDLWW) through microbes immobilized carbon consisted a bioreactor (MICCR) and reactive struvite crystallization process. Initially, 90% of the organic content of TDLWW was removed using a MICCR reactor at 24 h retention time. Nanoporous carbon (NPC) was used as the carrier matrix for the MICCR reactor. SEM and AFM images of NPC used in the MICCR reactor identify different microorganisms on its surface. The microbial profile of NPC used in the MICCR was analyzed, and the relative abundance is phyla Firmicutes, 25.64%; Proteobacteria, 43.68%; Bacteroidetes, 6.58%; Cyanobacteria, 2.22%; Actinobacteria, 2.34% reason for organic removal. The removal of organics follows the pseudo-second-order rate kinetics with the rate constant of 1.75 × 10-3 L COD-1 h-1. For the reactive struvite crystallization, MgO and Na2HPO4.2H2O were taken as the precipitating agents. The optimum molar ratio for the maximum conversion of NH4+-N into struvite was obtained as 1:1.4:1.4 (NH4+-N:MgO:Na2HPO4.2H2O). The volume of struvite precipitate was 48.5 mL/L of TDLWW, and the dry weight was 8.89 g/L. More than 93% of NH4+-N was converted as the struvite fertilizer. The conversion of NH4+-N into struvite follows the pseudo-first-order rate kinetics with the rate constant of 1.67 × 10-2 min-1. Despite the conversion of NH4+-N into struvite, COD removal was observed, which confirms the conversion of organic nitrogen into struvite. The struvite was evaluated using SEM, XRD, TGA, DSC, and FT-IR spectroscopic analysis. Hence, the integrated MICCR and the reactive struvite crystallization process can be applied to manage tannery deliming wastewater.
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Affiliation(s)
- Maharaja Pounsamy
- Environmental Engineering Department, Council of Scientific & Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai-600020, Tamil Nadu, India.
| | - Patchai Murugan Karmegam
- Environmental Science Lab, Council of Scientific & Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai-600020, Tamil Nadu, India
| | - Sekaran Ganesan
- SRMIST, Ramapuram Campus, Deemed University, Chennai-600089, Tamil Nadu, India
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4
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He S, Yang J, Fan X, Lu D, Zhang S, Yan L. Magnetosome yield characteristics modeling of acidithiobacillus ferrooxidans in airlift bioreactor using response surface methodology. J Biomater Appl 2023; 37:1325-1338. [PMID: 36250565 DOI: 10.1177/08853282221133647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bacterial magnetosomes had been proved to have great application potential in medicine and biotechnology. The objective of the present study was to obtain high yield of magnetosomes from Acidithiobacillus ferrooxidans (A. ferrooxidans) BYM in an airlift bioreactor using response surface methodology (RSM). The magnetosomes from A. ferrooxidans BYM were characterized using a transmission electron microscope and scanning electron microscopy. The maximum magnetosome yield of 0.4267 mg/L was achieved at ventilation capacity of 3.6 L/min and gluconic acid concentration of 10 mmol/L at 25oC. The correlation coefficient (R2) value of 0.8676 of the obtained model suggested a good correlation between the actual and predicted magnetosome yield. The confirmation experiment confirmed that the actual magnetosome yield of 0.391 mg/L obtained were in agreement with the predicted value of 0.398 mg/L. These results suggested that RSM can be employed to find out the optimum conditions for magnetosome formation in airlift bioreactor.
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Affiliation(s)
- Shuangjun He
- 91625Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, PR China
| | - Jiani Yang
- 91625Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, PR China
| | - Xinxin Fan
- 91625Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, PR China
| | - Dong Lu
- 53045Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Shuang Zhang
- 91625Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, PR China
| | - Lei Yan
- 91625Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, PR China
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5
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Comparison of the microbial communities in pits with different sealing methods for Chinese strong-flavor liquor production. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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6
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Zhao W, Bai M. Upgrading integrated fixed-biofilm activated sludge (IFAS) system into separated two-sludge denitrifying phosphorus removal system: Nutrient removal and microbial structure. CHEMOSPHERE 2022; 307:135918. [PMID: 35940405 DOI: 10.1016/j.chemosphere.2022.135918] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 07/11/2022] [Accepted: 07/30/2022] [Indexed: 06/15/2023]
Abstract
An integrated fixed-biofilm activated sludge (IFAS) system was upgraded into a separated two-sludge denitrifying phosphorus removal system to treat domestic sewage with a low carbon/nitrogen ratio (C/N = 3.6). The system was operated in IFAS mode for 135 days and then converted to the separated two-sludge mode to perform denitrifying phosphorus removal for 110 days. With denitrification and phosphorus removal conducted using "single carbon source", the experimental results show that the total inorganic nitrogen (TIN) and phosphorus (P) removal efficiencies were improved by 13.4% and 36.5%, respectively. As the activated sludge unit and biofilm unit were separated, Dechloromonas (4.10%) and Candidatus Accumulibacter (1.56%) were enriched in activated sludge system, while the nitrifiers Nitrospira and Nitrosomonas occupied the biofilm with proportions of 19.6% and 5.68%, respectively. The separated two-sludge denitrifying phosphorus removal system was characterized by higher nutrient removal and functional bacteria enrichment.
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Affiliation(s)
- Weihua Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, PR China.
| | - Meng Bai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
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7
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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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8
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Hall SJ, Huang W, Napieralski SA, Roden E. Shared Microbial Taxa Respond Predictably to Cyclic Time-Varying Oxygen Limitation in Two Disparate Soils. Front Microbiol 2022; 13:866828. [PMID: 35722278 PMCID: PMC9203030 DOI: 10.3389/fmicb.2022.866828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/16/2022] [Indexed: 11/27/2022] Open
Abstract
Periodic oxygen (O2) limitation in humid terrestrial soils likely influences microbial composition, but whether communities share similar responses in disparate environments remains unclear. To test if specific microbial taxa share consistent responses to anoxia in radically different soils, we incubated a rainforest Oxisol and cropland Mollisol under cyclic, time-varying anoxic/oxic cycles in the laboratory. Both soils are known to experience anoxic periods of days to weeks under field conditions; our incubation treatments consisted of anoxic periods of 0, 2, 4, 8, or 12 d followed by 4 d of oxic conditions, repeated for a total of 384 d. Taxa measured by 16S rRNA gene sequences after 48 d and 384 d of experimental treatments varied strongly with increasing anoxic period duration, and responses to anoxia often differed between soils at multiple taxonomic levels. Only 19% of the 30,356 operational taxonomic units (OTUs) occurred in both soils, and most OTUs did not respond consistently to O2 treatments. However, the OTUs present in both soils were disproportionally abundant, comprising 50% of sequences, and they often had a similar response to anoxic period duration in both soils (p < 0.0001). Overall, 67 OTUs, 36 families, 15 orders, 10 classes, and two phyla had significant and directionally consistent (positive or negative) responses to anoxic period duration in both soils. Prominent OTUs and taxonomic groups increasing with anoxic period duration in both soils included actinomycetes (Micromonosporaceae), numerous Ruminococcaceae, possible metal reducers (Anaeromyxobacter) or oxidizers (Candidatus Koribacter), methanogens (Methanomicrobia), and methanotrophs (Methylocystaceae). OTUs decreasing with anoxic duration in both soils included nitrifiers (Nitrospira) and ubiquitous unidentified Bradyrhizobiaceae and Micromonosporaceae. Even within the same genus, different OTUs occasionally showed strong positive or negative responses to anoxic duration (e.g., Dactylosporangium in the Actinobacteria), highlighting a potential for adaptation or niche partitioning in variable-O2 environments. Overall, brief anoxic periods impacted the abundance of certain microbial taxa in predictable ways, suggesting that microbial community data may partially reflect and integrate spatiotemporal differences in O2 availability within and among soils.
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Affiliation(s)
- Steven J. Hall
- Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, IA, United States
- *Correspondence: Steven J. Hall,
| | - Wenjuan Huang
- Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, IA, United States
| | | | - Eric Roden
- Department of Geoscience, University of Wisconsin-Madison, Madison, WI, United States
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9
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Hou B, Peng S, Deng R, Ren B, Song Y. Biological nutrients removal performance under starvation stress: Efficacy deterioration and recovery. BIORESOURCE TECHNOLOGY 2022; 351:126977. [PMID: 35276376 DOI: 10.1016/j.biortech.2022.126977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/28/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Biological nutrients removal performance affected by starvation stress was investigated via the addition of pre-anoxic stage to SBR. COD removal efficiency maintained at around 90% regardless of the starvation stress. Starvation stress presented significant impact on nitrogen and phosphorus removal, with noticeable reduction of TN removal and remarkable deterioration of TP removal as prolonging the pre-anoxic time, which was mainly attributed to the integrative effect of carbon source competition, depression of denitrification and invalid P release as well as the variation of microbial community. It was notable that starvation stress exerted distinct evolution on microbial community. The improvement in relative abundance of the certain genera relating to denitrification was the main reason for the partial recovery of nitrogen removal after eliminating stress starvation. The promotion of P uptake capacity accompanied with the relief of invalid P release and the enriched DPAOs accounted for the complete recovery of phosphorus removal.
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Affiliation(s)
- Baolin Hou
- School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Sining Peng
- School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Renjian Deng
- School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
| | - Bozhi Ren
- School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
| | - Yujia Song
- School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
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10
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Apollo S. A review of sludge production in South Africa municipal wastewater treatment plants, analysis of handling cost and potential minimization methods. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2021-0234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The government of South Africa through the department of water and sanitation has installed numerous activated sludge systems in most of the municipal wastewater treatment plants (MWWTPs) to ensure adequate sanitation. However, secondary sludge generation and handling is a major challenge of the AS process. This work reviews the sludge production potential in selected regions in South Africa including Midvaal, Emfuleni and Lesedi municipalities. Further, the sludge handling cost and potential methods of sludge minimization are discussed. This study found that the selected MWWTPs discharge effluent volume of between 3 and 65 ML/day with average COD of about 350 mg/L leading to sludge production of between 5 and 23 tons/day with an estimated handling cost of €57,000 to €320,000 per year. Some of the technologies reviewed for sludge minimization to cut down plant operation cost include chemical oxidation using ozone and potassium ferrate (K2FeO4), application of oxic-settling-anaerobic (OSA) process, anaerobic/anoxic/oxic (AAO) combined with K2FeO4 oxidation side stream reactor (SSR), SANI® technology and use of anaerobic side stream reactor (ASSR) in the conventional activated sludge (AS) line.
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Affiliation(s)
- Seth Apollo
- Department of Chemical Engineering , Vaal University of Technology , Private Bag X21 , Vanderbijlpark , South Africa
- Department of Physical Sciences , University of Embu , P.O. Box 6-60100 , Embu , Kenya
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11
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Li J, Wang Y, Liu J, Peng Y, Zhang L, Lin J. Intensified nitrogen removal by endogenous denitrification in a full-scale municipal wastewater treatment plant. ENVIRONMENTAL RESEARCH 2022; 205:112564. [PMID: 34906589 DOI: 10.1016/j.envres.2021.112564] [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: 11/14/2021] [Revised: 12/10/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
In this study, for the first time, endogenous denitrification (ED) was enhanced in a practical anaerobic-anoxic-oxic-[post-anoxic]-[post-oxic] (AAO-AO) process, contributing to a remarkable increase in the nitrogen removal efficiency (NRE). The long-term operation (203 days) result showed that the NRE was improved by 7% compared to the theoretical maximum NRE (68-70%) of AAO processes, with the effluent total nitrogen (TN) decreasing from 13.7 (1 d) to 6.1 mg/L (203 d). Approximately 99.4% of the influent COD was transformed to poly-β-hydroxyalkanoates (PHAs) in the anaerobic zone. The synthesized PHAs were consumed in the following zones and the secondary sedimentation tank accompanied by over 32.5% N-loss, indicating that the ED process could be responsible for the enhanced NRE. 16S rRNA amplicon sequencing results further confirmed that denitrifying glycogen-accumulating organisms, which are capable of ED, were enriched with the relative abundance of 2.10%. Our findings provide a novel cost- and energy-efficient strategy to improve nitrogen removal without external carbon additions but by enhancing ED performance.
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Affiliation(s)
- Jia Li
- State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
| | - Yayi Wang
- State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China.
| | - Jie Liu
- Beijing Capital Eco- Environment Production Group Company Limited, Beijing, 100044, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Jia Lin
- Beijing Capital Eco- Environment Production Group Company Limited, Beijing, 100044, China.
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12
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Impact of Uneven Flow Wastewater Distribution on the Technological Efficiency of a Sequencing Batch Reactor. SUSTAINABILITY 2022. [DOI: 10.3390/su14042405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Variability in the load of pollutants significantly influences the efficiency of activated sludge technology in municipal wastewater treatment plants, both in terms of flow systems and in sequencing batch reactors (SBR). Diversified inflow of wastewater to the treatment plant has a significant impact on the technological efficiency of sequencing batch reactors. Additionally, this problem is intensified in technological systems in which there is no storage tank for raw wastewater. It is assumed, however, that the flexible operation of an SBR reactor allows it to be easily adapted to a variable load of pollutants. The aim of the article is to present the effects of uneven wastewater inflow on the operation of sequencing batch reactors using the example of the wastewater treatment plant in Rabka-Zdrój (Poland). The conducted research has shown that, in wastewater treatment plants, the use of sequencing batch reactors as an independent element of biological wastewater treatment does not always ensure a high degree of pollutant removal in the event of a very uneven wastewater inflow. Therefore, the use treated wastewater equalizing tanks is recommended, which can additionally clean residual contaminants from wastewater.
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13
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Gao R, Peng Y, Li J, Liu Y, Deng L, Li W, Kao C. Mainstream partial denitrification-anammox (PD/A) for municipal sewage treatment from moderate to low temperature: Reactor performance and bacterial structure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150267. [PMID: 34600206 DOI: 10.1016/j.scitotenv.2021.150267] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/05/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Anammox is sensitive to temperature, which can limit its practical application in wastewater treatment. In this study, a step-feed anoxic-oxic (A/O) process coupled with PD/A was operated steadily from 26.8 °C to 13.1 °C for wastewater treatment for 200 days. The effluent total inorganic nitrogen (TIN) and phosphorus concentrations were 10.2 mg/L and 0.29 mg/L at C/N ratio of 4.6 and 15.0 °C even with increasing nitrogen loading rate (NLR). The anammox activity was 5.60 mg NH4+-N/gMLSS/d even at 14 °C, moreover, anammox abundance on the biocarriers increased with decreasing temperature. It was observed that the effect of partial denitrification (PD) was enhanced under low temperature, thus the contribution of anammox for nitrogen removal was improved. The pathway of anammox for nitrogen removal accounted for 48% and the effect of effluent did not deteriorate under low temperature. This study states that PD/A has advantages under low temperature operation, which is suitable for treatment of wastewater with low C/N ratio.
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Affiliation(s)
- Ruitao 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
| | - 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.
| | - Jianwei 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
| | - Ying Liu
- Zhongshan Public Utilities Water Co.Ltd., Zhongshan 528400, PR China
| | - Liyan Deng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Wenyu 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
| | - Chengkun Kao
- 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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14
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Luo L, Zhou W, Yuan Y, Zhong H, Zhong C. Effects of salinity shock on simultaneous nitrification and denitrification by a membrane bioreactor: Performance, sludge activity, and functional microflora. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 801:149748. [PMID: 34467905 DOI: 10.1016/j.scitotenv.2021.149748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/14/2021] [Accepted: 08/14/2021] [Indexed: 06/13/2023]
Abstract
Physical and chemical treatments of Tungsten smelting wastewater, with high salt content and low C/N ratio, are often tedious. As a solution, this study suggested a simultaneous nitrification and denitrification membrane bioreactor (SND-MBR) for salinity gradient domestication. During the salinity acclimation period, we observed 20% and 11% removal of NH4+-N and Chemical Oxygen Demand (COD), respectively. However, the SND efficiency reached 95.55% after stable operation at 3.0% salinity. Through stoichiometric and kinetic analyses, we confirmed that increased salinity significantly inhibited electron transport system activity, nitrification, and denitrification, evidenced by the extremely low ammonia monooxygenase and nitrite reductase activities. Further high-throughput sequencing showed that Nitrosomonas dominated the functional microbial flora succession and denitrification in high salinity environments. In comparison with a control, the Kyoto Encyclopedia of Genes and Genomes analysis showed that wastewater salinity weakened the functional gene level of MBR microbial flora, and the enzyme key to the assimilation nitrate reduction changed from nitrate reductase to assimilation nitrate reductase.
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Affiliation(s)
- Ling Luo
- College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Wenwang Zhou
- College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Ye Yuan
- College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Hui Zhong
- College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Changming Zhong
- College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China; Key Laboratory of Environmental Pollution Control of Mining and Metallurgy in Jiangxi Province, Ganzhou 341000, China.
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15
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Gao R, Peng Y, Li J, Li X, Zhang Q, Deng L, Li W, Kao C. Nutrients removal from low C/N actual municipal wastewater by partial nitritation/anammox (PN/A) coupling with a step-feed anaerobic-anoxic-oxic (A/A/O) system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149293. [PMID: 34364274 DOI: 10.1016/j.scitotenv.2021.149293] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/07/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
In this study, a novel combined strategy was successfully established by partial nitritation/anammox (PN/A) within a step-feed A/A/O process integrated with fixed-biocarriers to treat municipal sewage for 200 days. The excellent nutrients removal performance of this system compared with national level of discharging standard were achieved: low total inorganic nitrogen (7.1 mg/L) and phosphorus (0.3 mg/L) in the effluent with the influent (51.1 and 4.2 mg/L) at C/N ratios of 3.4 ± 0.5, mainly attributed to the stable PN (oxic zone) and subsequently anammox effect (anoxic zone). Nitrogen mass balance indicated that anammox contribution in anoxic zones to nitrogen loss could be up to 42% at stable phase. Therefore, aeration and carbon cost could be greatly reduced under low DO, low C/N and aerobic hydraulic retention time (HRT) of 7.4 h condition. The low DO and anammox bacteria retention in anoxic chambers promoted the washout of NOB and combination of anammox and partial nitritation process. During long-term operation, the activity of AOB effectively maintained while that of NOB drastically reduced to 0.1 mg N / g MLSS / h resulting in high and stable nitrite accumulation ratios (about 90%). The achievement of partial nitritation was mainly due to low DO (0.4-0.5 mg/L) and effective retention of anammox bacteria even with a low temperature (14.5 °C). Notedly, anammox activity gradually increased both on the biocarriers and in the flocs while a higher anammox abundance was observed on the biocarriers (2.48%) than that in suspend flocs (0.03%). As above, this study indicated that the novel combined strategies could be applicable to mainstream anammox, and a pilot-scale reactor will be established to verify and promote the industrial application of mainstream anammox.
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Affiliation(s)
- Ruitao 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
| | - 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.
| | - Jianwei 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
| | - 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
| | - Liyan Deng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Wenyu 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
| | - Chengkun Kao
- 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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16
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Zhang Z, Zhong M, Sun Y, Liang Y, Liu M, Li J, Cui H, Meng F, Huang Z, Cui L. Efficient treatment of digested piggery wastewater via an improved anoxic/aerobic process with Myriophyllum spicatum and bionic aquatic weed. BIORESOURCE TECHNOLOGY 2021; 341:125825. [PMID: 34481299 DOI: 10.1016/j.biortech.2021.125825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
The traditional anoxic/aerobic process (A/O) process is widely used for treating digested piggery wastewater, but the lack of carbon sources leads to poor efficiency. Therefore, the process needs optimization to achieve high-efficiency and low-cost operation mode. In this study, an improved A/O system with bionic aquatic weed and Myriophyllum sp. was established to decontaminate digested piggery wastewater. The average removal efficiencies of chemical oxygen demand (COD), NH4+-N, and total nitrogen (TN) by the improved A/O system was satisfactory. The average removal efficiencies of COD, NH4+-N, and TN were 62.1%, 87.5%, and 61.9%, respectively. High-throughput sequencing identified a number of dominant microorganisms. The relative abundance of Nitrosomonas (ammonia-oxidizing bacteria) and Nitrospira (nitrite-oxidizing bacteria) was 0.07%-3.52% and 0.32%-1.30%, respectively. Combining bionic aquatic weed and Myriophyllum sp. altered the microbial community structure and metabolic pathways. The results demonstrate a cost-effective method for treating digested piggery wastewater.
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Affiliation(s)
- Ze Zhang
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Mingjun Zhong
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Yaping Sun
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Yuhai Liang
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Mengxue Liu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Jing Li
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Hongcan Cui
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhujian Huang
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China
| | - Lihua Cui
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China.
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17
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Wu ZY, Zhu WP, Liu Y, Zhou LL, Liu PX, Xu J. An integrated biological-electrocatalytic process for highly-efficient treatment of coking wastewater. BIORESOURCE TECHNOLOGY 2021; 339:125584. [PMID: 34303099 DOI: 10.1016/j.biortech.2021.125584] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/10/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Coking wastewater is typically refractory, mainly due to its biological toxicity and complex composition. In this study, a novel integrated biological-electrocatalytic process consisting of two three-dimensional electrochemical reactors (3DERs), two biological aerated filters (BAFs), and a three-dimensional biofilm electrode reactor (3DBER) is developed for the advanced treatment of coking wastewater. 73.21% of chemical oxygen demand (COD), 38.02% of ammonium nitrogen (NH4+-N) and 91.46% of nitrate nitrogen (NO3--N) are removed by 3DERs. BAFs mainly convert NH4+-N to NO3--N through microbial nitrification. The 3DBER removes the residual NO3--N by bio-electrochemical denitrification. The integrated system can eliminate 74.72-83.27% of COD, 99.38-99.74% of NH4+-N, and 69.64-99.83% of total nitrogen from coking wastewater during the continuous operation, as well as significantly reducing the toxicity of the wastewater. The superiorities of the integrated 3DERs/BAFs/3DBER system recommend the application of such biological-electrocatalytic technology in the treatment of highly toxic wastewater.
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Affiliation(s)
- Zhen-Yu Wu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Wei-Ping Zhu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Yang Liu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Lu-Lu Zhou
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Peng-Xi Liu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Juan Xu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China; Institute of Eco-Chongming (IEC), No. 20 Cuiniao Road, ChenJiazhen, Shanghai 202162, China.
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18
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Renuka N, Ratha SK, Kader F, Rawat I, Bux F. Insights into the potential impact of algae-mediated wastewater beneficiation for the circular bioeconomy: A global perspective. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 297:113257. [PMID: 34303940 DOI: 10.1016/j.jenvman.2021.113257] [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: 01/31/2021] [Revised: 06/28/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
Algae-based technologies are one of the emerging solutions to societal issues such as accessibility to clean water and carbon-neutral energy and are a contender for the circular bioeconomy. In this review, recent developments in the use of different algal species for nutrient recovery and biomass production in wastewater, challenges, and future perspectives have been addressed. The ratio and bioavailability of nutrients in wastewater are vital parameters, which significantly impact nutrient recovery efficiency and algal biomass production. However, the optimum nutrient concentration and ratio may vary depending upon the microalgal species as well as cultivation conditions. The use of indigenous algae and algae-based consortia with other microorganisms has been proved promising in improving nutrient recovery efficiency and biomass production in pilot scale operations. However, environmental and cultivation conditions also play a significant role in determining the feasibility of the process. This review further focused on the assessment of the potential benefits of algal biomass production, renewable biofuel generation, and CO2 sequestration using wastewater in different countries on the basis of available data on wastewater generation and estimated nutrient contents. It was estimated that 5-10% replacement of fossil crude requirement with algal biofuels would require ~952-1903 billion m3 of water, 10-21 billion tons of nitrogen, and 2-4 billion tons of phosphorus fertilizers. In this context, coupling wastewater treatment and algal biomass production seem to be the most sustainable option with potential global benefits of polishing wastewater through nutrients recycling and carbon dioxide sequestration.
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Affiliation(s)
- Nirmal Renuka
- Institute for Water and Wastewater Technology, Durban University of Technology, P.O Box 1334, Durban, 4000, South Africa
| | - Sachitra Kumar Ratha
- Institute for Water and Wastewater Technology, Durban University of Technology, P.O Box 1334, Durban, 4000, South Africa; Phycology Laboratory, CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, 226001, India
| | - Farzana Kader
- Institute for Water and Wastewater Technology, Durban University of Technology, P.O Box 1334, Durban, 4000, South Africa
| | - Ismail Rawat
- Institute for Water and Wastewater Technology, Durban University of Technology, P.O Box 1334, Durban, 4000, South Africa
| | - Faizal Bux
- Institute for Water and Wastewater Technology, Durban University of Technology, P.O Box 1334, Durban, 4000, South Africa.
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19
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Li Y, Wu Y, Wang S, Jia L. Effect of organic loading on phosphorus forms transformation and microbial community in continuous-flow A 2/O process. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:2640-2651. [PMID: 34115619 DOI: 10.2166/wst.2021.158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A continuous-flow Anaerobic/Anoxic/Oxic (A2/O) system was operated at different organic concentrations to systematically investigate the effect on the nutrient removal, secretion characteristics of extracellular polymer, phosphorus forms transformation and changes in functional flora in this system. The results showed that high organic loading was more conducive to promote the secretion of extracellular polymeric substance (EPS), the increase of polysaccharide content was more obvious compared with protein, the impact of organic loading on the components of loosely bound EPS (LB-EPS) was higher than that of tight-bound EPS (TB-EPS). Phosphorus in sludge floc mainly existed in the form of inorganic phosphorus (IP), and IP mainly existed in the form of apatite inorganic phosphorus (AP). High organic load showed higher phosphorus storage in EPS, and the phosphorus content in EPS was positively correlated with the content of EPS. Non-apatite phosphorus (NAIP) content played an important role in the extracellular dephosphorization. The abundance of Nitrosomonas and Nitrospira responsible for nitrification decreased with the increase in organic loading. The group of denitrifiers was large, and Azospira was the most abundant genus among them. Dechloromonas, Acinetobacter, Povalibacter, Chryseolinea and Pirellula were the functional genera closely associated with phosphorus removal.
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Affiliation(s)
- Yajing Li
- School of Environmental and Municipal Engineering, TCU, Tianjin 300384, China E-mail: ; Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China
| | - Yaping Wu
- School of Environmental and Municipal Engineering, TCU, Tianjin 300384, China E-mail:
| | - Shaopo Wang
- School of Environmental and Municipal Engineering, TCU, Tianjin 300384, China E-mail: ; Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China
| | - Liyuan Jia
- Tianjin IKWEN Water Treatment Co., Ltd, Tianjin 300000, China
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20
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Jiang Y, Huang H, Tian Y, Yu X, Li X. Stochasticity versus determinism: Microbial community assembly patterns under specific conditions in petrochemical activated sludge. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124372. [PMID: 33338810 DOI: 10.1016/j.jhazmat.2020.124372] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/21/2020] [Accepted: 10/21/2020] [Indexed: 06/12/2023]
Abstract
The pattern of microbial community assembly in petrochemical sludge is not well-explained. In this study, three kinds of petrochemical activated sludge (AS) from the same seed sludge were investigated to determine their microbial assembly pattern for long-term adaptation. Beta Nearest Taxon Index analysis revealed that the assembly strategies of the abundant and rare operational taxonomic unit (OTU) sub-communities are different for archaeal and bacterial communities. Abundant OTUs preferred deterministic processes, whereas rare OTUs randomly formed due to weak selection. Canonical correspondence analysis/variation partition analysis and Mantel testing results revealed that ammonium, petroleum, and chromium (Cr (VI)) mainly structured the abundant sub-communities. On the other hand, environmental variables, including ammonium, petroleum, and heavy metals, shaped the rare sub-communities. The PICRUSt2 tool was used to predict the functions. Results indicated a greater abundance of microbes harboring the hydrocarbon degradation pathway and heavy-metal-resistant enzymes. Cross-treatment experiments using one type of AS to treat the other two kinds of wastewater were conducted. The results of the cross-treatment experiments and qPCR both suggest the functional adaptation of the microbial community. We revealed selection strategies for the adaptation of bacteria and archaea in AS during environmental changes, providing a theoretical basis for petrochemical wastewater treatment.
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Affiliation(s)
- Yiming Jiang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China; Institute of Virology, Helmholtz Center Munich/ Technical University of Munich, Germany
| | - Haiying Huang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China; Institute of Virology, Helmholtz Center Munich/ Technical University of Munich, Germany
| | - Yanrong Tian
- Sewage Disposal Plant, Lanzhou Petrochemical Company, PetroChina, Huanxingdonglu #88, Lanzhou, Gansu 730060, PR China
| | - Xuan Yu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China
| | - Xiangkai Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
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21
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Xu W, Zhang T, Wan J, Li H, Chen Y, Wang Y. Phosphorus recovery via the formation of hydroxyapatite crystals at various nitrogen loading rate in an anammox-based UAFB. BIORESOURCE TECHNOLOGY 2021; 326:124628. [PMID: 33515914 DOI: 10.1016/j.biortech.2020.124628] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/23/2020] [Accepted: 12/25/2020] [Indexed: 06/12/2023]
Abstract
A strategy that integrates the anammox and hydroxyapatite crystallization in an up-flow anaerobic fixed-bed reactor (UAFB) was investigated to simultaneously remove nitrogen and recover phosphorus. During the 430 days of operation, 73.1 ± 6.6% of influent phosphorus was removed with an efficient nitrogen removal efficiency of 87.8 ± 1.7%. After long-term operation, numerous acicular and micron-sized crystals were observed on the matured biofilm, of which the phosphorus content was around 10.21% (wt%) and hydroxyapatite was the main form of crystals through SEM-EDS, FT-IR and XRD analysis. The variation of substrates along the axial length of UAFB showed that phosphate removal was positively correlated with anammox and pH. Moreover, three anammox bacteria including Candidatus Brocadia (19.73%), Candidatus Jettenia (0.49%) and Candidatus Kuenenia (0.85%) were detected at the bottom of UAFB, while Candidatus Jettenia (4.67%) was dominant at the top. Hence, the anammox-based biofilm system could be alternative for the recovery of phosphorus from nutrient-rich wastewater.
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Affiliation(s)
- Wenjie Xu
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China
| | - Tianyi Zhang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China
| | - Junfeng Wan
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China; Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Haisong Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China
| | - Yun Chen
- School of Environment, Nanjing Normal University, Nanjing 210023, PR China
| | - Yan Wang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China
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22
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He W, Wang Q, Zhu Y, Wang K, Mao J, Xue X, Shi Y. Innovative technology of municipal wastewater treatment for rapid sludge sedimentation and enhancing pollutants removal with nano-material. BIORESOURCE TECHNOLOGY 2021; 324:124675. [PMID: 33434870 DOI: 10.1016/j.biortech.2021.124675] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 06/12/2023]
Abstract
This study aims to develop a novel technology for actual municipal wastewater treatment to achieve rapid sludge sedimentation and high pollutants removal efficiency. The SBRs were modified and operated with periodic addition of 20 μL·L-1 nanofloc®. Results revealed that NH4+-N and chemical oxygen demand (COD) was efficiently removed in both laboratory- and pilot-scale SBRs, and the average removal efficiency of total nitrogen (TN) and total phosphorus (TP) was as high as 72.43 ± 2.66% and 98.63 ± 0.74%, respectively, with hydraulic retention time (HRT) of 8 h. Besides, the sludge volume index at 30 min (SVI30) was only 40.06 ± 1.99 mL·g-1, comparable with aerobic granular sludge (AGS). This novel technology could be proposed as a competitive method to upgrade, reconstruct and delay the expansion of municipal wastewater treatment plants (WWTPs) due to its rapid sludge sedimentation and efficient pollutants removal with low HRT.
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Affiliation(s)
- Wenyan He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China; College of Geology and Environment, Xi'an University of Science and Technology, Xi'An 710054, PR China
| | - Qibin Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China; Beijing Enterprises Water Group (China) Investment Limited, Beijing 100102, PR China
| | - Yue Zhu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jianhua Mao
- Beijing Enterprises Water Group (China) Investment Limited, Beijing 100102, PR China
| | - Xiaofei Xue
- Beijing Enterprises Water Group (China) Investment Limited, Beijing 100102, PR China
| | - Yanwei Shi
- Beijing Enterprises Water Group (China) Investment Limited, Beijing 100102, PR China
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23
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Zhang C, Xu P, Wang XC, Xu L. Bacterial viability and diversity in a landscape lake replenished with reclaimed water: a case study in Xi'an, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:32796-32808. [PMID: 32519106 DOI: 10.1007/s11356-020-08910-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
To understand the characteristics of bacterial viability and diversity in landscape waters replenished with reclaimed water, the typical landscape lake using reclaimed water was investigated in this study. Samples were collected from a reclaimed water inlet (P1), a reclaimed water distribution outlet (P2), and a landscape lake replenished by reclaimed water (P3). By means of measuring adenosine triphosphate (ATP), flow cytometry (FCM), and 16S rRNA gene high-throughput sequencing, the bacterial viability and diversity in reclaimed water distribution system and landscape lake were illustrated. The bacterial ATP contents at P1, P2, and P3 were 3.55 ± 1.79 ng/L, 3.31 ± 1.43 ng/L, and 18.97 ± 6.39 μg/L, and the intact bacterial cell concentrations were 5.91 ± 0.52 × 104 cells/mL, 7.95 ± 2.58 × 104 cells/mL, and 5.65 ± 2.10 × 106 cells/mL, respectively. These results indicated a significant increase of bacterial viability in the landscape lake. The Shannon diversity index of 6.535, 7.05, and 6.886 at P1, P2, and P3, respectively, demonstrated no notable change of bacterial diversity from reclaimed water distribution system to landscape lake. However, the relative abundance of Pseudomonas sp. at P3 was significantly higher than that at P1. These findings indicated that viable but non-culturable (VBNC) bacteria could be revived in the landscape lake. The bacterial viability during reclaimed water reuse should deserve special attention.
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Affiliation(s)
- Chongmiao Zhang
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Engineering Technology Research Center for Wastewater Treatment and Reuse, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Pengcheng Xu
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Engineering Technology Research Center for Wastewater Treatment and Reuse, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xiaochang C Wang
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Engineering Technology Research Center for Wastewater Treatment and Reuse, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Limei Xu
- International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Engineering Technology Research Center for Wastewater Treatment and Reuse, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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24
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Iannacone F, Di Capua F, Granata F, Gargano R, Esposito G. Simultaneous nitrification, denitrification and phosphorus removal in a continuous-flow moving bed biofilm reactor alternating microaerobic and aerobic conditions. BIORESOURCE TECHNOLOGY 2020; 310:123453. [PMID: 32371322 DOI: 10.1016/j.biortech.2020.123453] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/22/2020] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
A continuous-flow moving bed biofilm reactor (IAMBBR) alternating microaerobic and aerobic conditions was used to remove carbon, nitrogen and phosphorus through simultaneous nitrification and denitrification coupled to phosphorus removal (SNDPR). The IAMBBR was operated under different dissolved oxygen (DO) ranges (0.2-2, 0.2-3 and 0.2-4 mg L-1) and feed C/N ratios (2.8, 3.6 and 4.2) at HRT of 1 day. At a DO range of 0.2-3 mg L-1 and feed C/N ratio of 3.6, the IAMBBR achieved simultaneous removal of dissolved organic carbon (DOC), total inorganic nitrogen (TIN) and P-PO43- with average efficiencies of 100%, 62% and 75%, respectively. Illumina sequencing revealed the coexistence of nitrifiers and P-accumulating denitrifiers (e.g. Hydrogenophaga) in the IAMBBR biofilm. Batch activity tests showed that phosphorus uptake did not occur under stable anaerobic or anoxic conditions, nor under aerobic conditions in absence of nitrate.
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Affiliation(s)
- Francesca Iannacone
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Gaetano di Biasio 43, 03043 Cassino, Italy.
| | - Francesco Di Capua
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy
| | - Francesco Granata
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Gaetano di Biasio 43, 03043 Cassino, Italy
| | - Rudy Gargano
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Gaetano di Biasio 43, 03043 Cassino, Italy
| | - Giovanni Esposito
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy
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25
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Li T, Guo Z, She Z, Zhao Y, Guo L, Gao M, Jin C, Ji J. Comparison of the effects of salinity on microbial community structures and functions in sequencing batch reactors with and without carriers. Bioprocess Biosyst Eng 2020; 43:2175-2188. [PMID: 32661564 DOI: 10.1007/s00449-020-02403-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 07/03/2020] [Indexed: 11/30/2022]
Abstract
This study investigated and compared the microbial communities between a sequencing batch reactor (SBR) without carriers and a hybrid SBR with addition of carriers for the treatment of saline wastewater. The two systems were operated over 292 days with alternating aerobic/anoxic mode (temperature: 28℃, salinity: 0.0-3.0%). High removal efficiency of chemical oxygen demand (COD) and total inorganic nitrogen (TIN) was achieved in both the SBR (above 86.7 and 95.4% respectively) and hybrid SBR (above 84.4 and 94.0%) at 0.0-2.5% salinity. Further increasing salinity to 3.0% decreased TIN removal efficiency to 78.4% in the hybrid SBR. Steep decline of biodiversity and relative abundance of ammonia-oxidizing bacteria (AOB) contributed to the worse performance. More genera related to sulfide-oxidizing and sulfate-reducing bacteria were detected in the hybrid SBR than the SBR at 3.0% salinity. The abundance of halotolerant bacteria increased with the salinity increase for both reactors, summing up to 25.5% in the suspended sludge (S-sludge) from the SBR, 28.9 and 22.9% in the S-sludge and biofilm taken from the hybrid SBR, respectively. Nitrification and denitrification via nitrate was the main nitrogen removal pathway in the SBR and hybrid SBR at 0.0 and 0.5% salinity, while partial nitrification and denitrification via nitrite became the key process for nitrogen removal in the two reactors when the salinity was increased to 1.0-3.0%. Higher abundance of anaerobic ammonium-oxidizing (ANAMMOX) and sulfide-oxidizing autotrophic denitrification (SOAD) bacteria were found in the hybrid SBR at 3.0% salinity.
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Affiliation(s)
- Ting Li
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Zixuan Guo
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Zonglian She
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China. .,College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
| | - Yangguo Zhao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Liang Guo
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Chunji Jin
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
| | - Junyuan Ji
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China
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26
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Qiang J, Zhou Z, Wang K, Qiu Z, Zhi H, Yuan Y, Zhang Y, Jiang Y, Zhao X, Wang Z, Wang Q. Coupling ammonia nitrogen adsorption and regeneration unit with a high-load anoxic/aerobic process to achieve rapid and efficient pollutants removal for wastewater treatment. WATER RESEARCH 2020; 170:115280. [PMID: 31759237 DOI: 10.1016/j.watres.2019.115280] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/05/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
In this study, an ammonium nitrogen (NH4+-N) adsorption and regeneration (AAR) was constructed by a zeolite-packed column and NaClO-NaCl regeneration unit, and coupled with an anoxic/aerobic (AO) system to achieve efficient removal of carbon, nitrogen and phosphorus under short hydraulic retention time (HRT) and sludge retention time (SRT). Compared to conventional anaerobic/anoxic/aerobic (AAO) process, the proposed AO-AAR process achieved more efficient and stable nitrogen removal with greatly shorter HRT (5.6 h) and SRT (8 d) at 10.4 °C, with NH4+-N and total nitrogen in the effluent below 1.5 and 8.0 mg/L, respectively. The AO-AAR also obtained efficient phosphorus removal (<0.5 mg/L) by dosing aluminum in aerobic tank. High load and short SRT deteriorated sludge settleability and dewaterability, but enhanced methane production by improving sludge biodegradability. Dosing aluminum made the AO operating module more stable with improved settleability and dewaterability, and further enhanced methane production. Short HRT and SRT also resulted in the thriving of filamentous bacteria (Thiothrix) and heterotrophic nitrifiers (Acinetobacter, Pseudomonas and Rhodobacter) in the AO module, which helped in enhancing denitrification potential and nitrification efficiency under low temperature. Long-term operation showed that exchange capacity and physicochemical properties of zeolite were unchanged under NaClO-NaCl regeneration by introducing the tail gas from aerobic tank into the used regenerant to remove Ca2+ and Mg2+ exchanged from effluent of the AO module. Techno-economic analysis showed that the AO-AAR process is attractive and sustainable for municipal wastewater treatment by significantly improving nitrogen removal, greatly reducing land occupancy, enhancing methane production and achieving efficient reduction of carbon dioxide emission.
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Affiliation(s)
- Jiaxin Qiang
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Zhen Zhou
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
| | - Kaichong Wang
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Zhan Qiu
- Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai, 201203, China
| | - Hui Zhi
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Yao Yuan
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Yubin Zhang
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Yuexi Jiang
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Xiaodan Zhao
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
| | - Zhiwei Wang
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Qiaoying Wang
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
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27
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Ma X, Zhao B, Zhang X, Xie F, Cui Y, Li H, Yue X. Effect of periodic temperature shock on nitrogen removal performance and microbial community structure in plug-flow microaerobic sludge blanket. CHEMOSPHERE 2020; 241:124934. [PMID: 31604192 DOI: 10.1016/j.chemosphere.2019.124934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 09/05/2019] [Accepted: 09/21/2019] [Indexed: 06/10/2023]
Abstract
The positive effects nitrogen removal capability in a plug-flow microaerobic sludge blanket at low temperature are confirmed by inducing periodic high temperature shocks. This method enables enhancement of metabolic activity and an optimized bacterial community structure of microbes under the conditions of low C/N ratio and temperature. The control reactor was operated at a constant temperature of 20 °C, and the plug-flow microaerobic sludge blanket was subjected to a high temperature shock treatment with three cycles for 94 d. Starting with the initial temperature of 20 °C, after three cycles at temperature (30 °C) shock, the removal efficiencies of ammonium and total nitrogen at the terminal period increased to 68.0% and 54.7% from 51.1% to 35.6%, respectively. The activity and relative abundance of ammonia oxidizing bacteria, nitrite oxidizing bacteria, and anammox bacteria, dominated by Candidatus Brocadia at low temperature, were accordingly enhanced after periodic temperature shocks.
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Affiliation(s)
- Xiao Ma
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Bowei Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China.
| | - Xiao Zhang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Fei Xie
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Ying Cui
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Hui Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China.
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28
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Xia Z, Wang Q, She Z, Gao M, Zhao Y, Guo L, Jin C. Nitrogen removal pathway and dynamics of microbial community with the increase of salinity in simultaneous nitrification and denitrification process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 697:134047. [PMID: 31491641 DOI: 10.1016/j.scitotenv.2019.134047] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/16/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
In this study, simultaneous nitrification and denitrification (SND) process was successfully established in a hybrid sequencing batch biofilm reactor (HSBBR). High removal efficiency of NH4+-N (98.0±2.4% to 99.8±0.4%) and COD (86.6±4.0% to 91.6±1.8%) was observed in the salinity range of 0.0 to 2.4%. SND via nitrite, replacing SND via nitrate, became the main nitrogen removal pathway at 1.6% and 2.4% salinity. Suspended sludge and biofilm shared similar microbial composition. Dominant genera were substituted by salt-adaptable microbes as salinity increasing. Abundance of autotrophic ammonia-oxidizing bacteria (Nitrosomonas) increased with elevated salinity, while autotrophic nitrite-oxidizing bacteria (Nitrospira) exhibited extreme sensitivity to salinity. The presence of Gemmata demonstrated that heterotrophic nitrification co-existed with autotrophic nitrification in the SND process. Aerobic denitrifiers (Denitratisoma and Thauera) were also identified. Thiothrix, Sedimenticola, Sulfuritalea, Arcobacter (sulfide-based autotrophic denitrifier) and Hydrogenophaga (hydrogen-based autotrophic denitrifier) were detected in both S-sludge and biofilm. The occurrence of ANAMMOX bacteria Pirellula and Planctomyces indicated that ANAMMOX process was another pathway for nitrogen removal. Nitrogen removal in the HSBBR was accomplished via diverse pathways, including traditional autotrophic nitrification/heterotrophic denitrification, heterotrophic nitrification, aerobic and autotrophic denitrification, and ANAMMOX.
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Affiliation(s)
- Zhengang Xia
- College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Qun Wang
- College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Zonglian She
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China.
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Yangguo Zhao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Liang Guo
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Chunji Jin
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
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29
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Lin J, He F, Su B, Sun M, Owens G, Chen Z. The stabilizing mechanism of cadmium in contaminated soil using green synthesized iron oxide nanoparticles under long-term incubation. JOURNAL OF HAZARDOUS MATERIALS 2019; 379:120832. [PMID: 31276925 DOI: 10.1016/j.jhazmat.2019.120832] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/08/2019] [Accepted: 06/26/2019] [Indexed: 05/02/2023]
Abstract
Despite numerous studies having been conducted on the stabilization of heavy metal contaminated soil, our understanding of the mechanisms involved remains limited. Here green synthesized iron oxide nanoparticles (GION) were applied to stabilize cadmium (Cd) in a contaminated soil. GION not only stabilized soil Cd, but also improved soil properties within one year of incubation. After GION application both the exchangeable and carbonate bound Cd fractions decreased by 14.2-83.5% and 18.3-85.8% respectively, and most of the Cd was translocated to the residual Cd fraction. The application of GION also strongly altered soil bacterial communities. In GION treatments, the abundance of Gemmatimonadetes, Proteobacteria, and Saccharibacteria increased which led to a shift in the dominant bacterial genera from Bacillus to Candidatus koribacter. The variation in bacteria confirmed the restoration of the contaminated soil. The most abundant bacterial genus and species found in GION treatments were related to (i) plant derived biomass decomposition; (ii) ammoxidation and denitrification; and (iii) Fe oxidation. GION application may enhance the formation of larger soil aggregates with anaerobic centers and coprecipitation coupled Fe (II) oxidization, ammoxidation and nitrite reduction followed by Fe mineral ripening may be involved in Cd stabilization. The predominant stabilization mechanism was thus coprecipitation-ripening-stabilization.
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Affiliation(s)
- Jiajiang Lin
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China
| | - Fengxin He
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China
| | - Binglin Su
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China
| | - Mengqiang Sun
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Zuliang Chen
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China; Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, SA, 5095, Australia.
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30
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Limayem A, Wasson S, Mehta M, Pokhrel AR, Patil S, Nguyen M, Chen J, Nayak B. High-Throughput Detection of Bacterial Community and Its Drug-Resistance Profiling From Local Reclaimed Wastewater Plants. Front Cell Infect Microbiol 2019; 9:303. [PMID: 31637218 PMCID: PMC6787911 DOI: 10.3389/fcimb.2019.00303] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/07/2019] [Indexed: 11/30/2022] Open
Abstract
Treated wastewater from reclaimed facilities (WWTP) has become a reusable source for a variety of applications, such as agricultural irrigation. However, it is also a potential reservoir of clinically-relevant multidrug resistant (MDR) pathogens, including ESKAPE (Enterococcus faecium and Streptococcus surrogates, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species along with the emerging nosocomial Escherichia strains). This study was performed to decipher the bacterial community structure through Illumina high throughput 16S rRNA gene sequencing, and to determine the resistance profile using the Sensititre antimicrobial susceptibility test (AST) conforming to clinical lab standards (NCCLS). Out of 1747 bacterial strains detected from wastewater influent and effluent, Pseudomonas was the most predominant genus related to ESKAPE in influent, with sequence reads corresponding to 21.356%, followed by Streptococcus (6.445%), Acinetobacter (0.968%), Enterococcus (0.063%), Klebsiella (0.038%), Escherichia (0.028%) and Staphylococcus (0.004%). Despite the different treatment methods used, the effluent still revealed the presence of some Pseudomonas strains (0.066%), and a wide range of gram-positive cocci, including Staphylococcus (0.194%), Streptococcus (0.63%) and Enterococcus (0.037%), in addition to gram-negative Acinetobacter (0.736%), Klebsiella (0.1%), and Escherichia sub-species (0.811%). The AST results indicated that the strains Escherichia along with Klebsiella and Acinetobacter, isolated from the effluent, displayed resistance to 11 antibiotics, while Pseudomonas was resistant to 7 antibiotics, and Streptococcus along with Staphylococcus were resistant to 9 antibiotics. Results herein, proved the existence of some nosocomial MDR pathogens, known for ESKAPE, with potential drug resistance transfer to the non-pathogen microbes, requiring targeted remediation.
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Affiliation(s)
- Alya Limayem
- Graduate Program, Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, United States.,Division of Translational Medicine, Center for Education in Nanobioengineering, University of South Florida, Tampa, FL, United States
| | - Sarah Wasson
- Graduate Program, Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, United States
| | - Mausam Mehta
- Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Anaya Raj Pokhrel
- Graduate Program, Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, United States
| | - Shrushti Patil
- Graduate Program, Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, United States
| | - Minh Nguyen
- College of Public Health, University of South Florida, Tampa, FL, United States.,College of Arts and Sciences, University of South Florida, Tampa, FL, United States
| | - Jing Chen
- Graduate Program, Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, United States
| | - Bina Nayak
- Pinellas County Utilities, Water Quality Division, Largo, FL, United States
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31
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Chang M, Wang Y, Pan Y, Zhang K, Lyu L, Wang M, Zhu T. Nitrogen removal from wastewater via simultaneous nitrification and denitrification using a biological folded non-aerated filter. BIORESOURCE TECHNOLOGY 2019; 289:121696. [PMID: 31252319 DOI: 10.1016/j.biortech.2019.121696] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 06/09/2023]
Abstract
A conventional biological filter has been shown to be a viable method for removing nitrogenous compounds from wastewater, but it still has many disadvantages. In this study, a biological folded non-aerated filter (BFNAF) was designed, and its feasibility for nitrogen-loaded wastewater treatment has been confirmed. Effects of the HRT and the COD/N ratio on the performance of BFNAF were investigated. Through response surface method, when the COD/N ratio and the HRT were 5.39 and 10.83 h, removal efficiencies of NH4+, COD and TN reached maximum values of 88.62 ± 0.81%, 76.12 ± 0.57%, and 50.48 ± 1.02%, respectively. In addition, it was found that several denitrifying bacteria, such as Azoarcus, Arcobacter, Flavobacterium, along with many ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, co-existed in the community of the biofilm. All the results showed that the BFNAF could realize the simultaneous nitrification and denitrification (SND) process effectively.
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Affiliation(s)
- Mingdong Chang
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China
| | - Youzhao Wang
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China
| | - Yuan Pan
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China
| | - Kuo Zhang
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China
| | - Liting Lyu
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China
| | - Min Wang
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China
| | - Tong Zhu
- School of Mechanical Engineering and Automation, Northeastern University, 3-11, Wenhua Road, Heping District, Shenyang 110819, China.
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32
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Sun C, Yuan J, Xu H, Huang S, Wen X, Tong N, Zhang Y. Simultaneous removal of nitric oxide and sulfur dioxide in a biofilter under micro-oxygen thermophilic conditions: Removal performance, competitive relationship and bacterial community structure. BIORESOURCE TECHNOLOGY 2019; 290:121768. [PMID: 31323510 DOI: 10.1016/j.biortech.2019.121768] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 07/03/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
The efficiency of a biofilter to simultaneously remove nitric oxide (NO) and sulfur dioxide (SO2) was investigated under thermophilic (48 ± 2 °C) micro-oxygen (3 vol%) conditions. After the start-up stage (Days 0-14), the stable operation period was divided into three stages. SO2 inlet concentration remained 500 mg/m3, NO inlet concentrations were 300 mg/m3 (Days 15-40), 500 mg/m3 (Days 41-70) and 700 mg/m3 (Days 71-100). In each stable stage, the removal efficiency of NO and SO2 exceeded 90%, the maximum removal rates of NO and SO2 were 98.08% and 99.61%, respectively. The final products of SO2 were mostly sulphur. Nitrate-reducing bacteria inhibited sulphate-reducing bacteria. Illumina high-throughput sequencing confirmed that the relative abundance of nitrate-reducing bacteria was positively correlated with NO removal efficiency, the relative abundance of sulphate-reducing bacteria was related to the conversion rate of sulphur.
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Affiliation(s)
- Congcong Sun
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Jianqi Yuan
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Hao Xu
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China.
| | - Xiangyu Wen
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Na Tong
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Yongqing Zhang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
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33
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Li J, Peng Y, Zhang L, Liu J, Wang X, Gao R, Pang L, Zhou Y. Quantify the contribution of anammox for enhanced nitrogen removal through metagenomic analysis and mass balance in an anoxic moving bed biofilm reactor. WATER RESEARCH 2019; 160:178-187. [PMID: 31146189 DOI: 10.1016/j.watres.2019.05.070] [Citation(s) in RCA: 186] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 05/14/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
In this study, enhanced nitrogen removal through in situ enrichment of anammox bacteria was successfully obtained in a full-scale municipal wastewater treatment plant (WWTP). The WWTP was an anaerobic-anoxic-oxic (AAO) process and upgraded by adding moving carriers into the anoxic zone. Enhanced nitrogen removal was obtained during almost two years of operation. The significant nitrogen removal might be associated with the in situ enrichment of anammox bacteria on the adding carriers, as revealed by the comprehensive results of molecular analysis and 15N-stable isotope tracing tests. Quantitative PCR results indicated that anammox bacteria in the anoxic-carrier biofilms presented a higher abundance than flocculent sludge (16S rRNA: P < 0.005; HzsB: P < 0.042). The 16S rRNA amplicon sequencing showed significant differences in the phylum Planctomycetes (P < 0.001) between anoxic-carrier biofilms and flocculent sludge. And metagenomic sequencing analysis further revealed the anammox relative abundance in the anoxic-carrier biofilms was significantly higher than the reported level in the flocculent sludge of conventional WWTPs. In addition, 15N-stable isotope tracing tests showed that anammox could be combined with nitrate reduction by the anoxic-carrier biofilms. Thus, enriched anammox bacteria might contribute to nitrogen loss and lead to improvements in the nitrogen removal, which was also supported by the mass balance analysis of organic carbon, nitrogen, and phosphorus of the WWTP. Overall, this study suggests that anoxic-carrier biofilms might be a candidate to enhance nitrogen removal through partial anammox in municipal WWTPs.
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Affiliation(s)
- Jianwei 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.
| | - 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
| | - Xiaodan 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
| | - Ruitao 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
| | - Lu Pang
- Xi'an Water Group Company Limited, Shaanxi, 710018, PR China
| | - Yaxu Zhou
- Xi'an Water Group Company Limited, Shaanxi, 710018, PR China
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Fu J, Lin Z, Zhao P, Wang Y, He L, Zhou J. Establishment and efficiency analysis of a single-stage denitrifying phosphorus removal system treating secondary effluent. BIORESOURCE TECHNOLOGY 2019; 288:121520. [PMID: 31132597 DOI: 10.1016/j.biortech.2019.121520] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/17/2019] [Accepted: 05/18/2019] [Indexed: 06/09/2023]
Abstract
For advanced phosphorus and nitrogen removal, denitrifying phosphorus removal (DPR) was used to treat secondary effluent of sewage plants based on alternating anoxic/anaerobic process within single-stage biofilter. Under the hydraulic load of 3 m3/(m2·h), average removal rates of TP and TN in the system were 61.05% and 90.54%. 82.7% of the NO3--N removal occurred in the upper of the packing layer. TP removal occurred in upper and lower of the packing layer, accounting for 42.02% and 57.98% of the total removal, respectively. Biomass and bioactivity decreased proportional to the height incensement of packing layer. Nitrogen and phosphorus removal rates increased with anaerobic time while decreased with hydraulic load. 16S rDNA sequencing results showed dominant DNPAOs in the system included Acinetobacter and Dechloromonas, while dominant denitrifying bacteria included Flavobacterium, Comamonadaceae, Hydrogenophaga, Thauera and Azospira. The study further provided an effective and feasible way for advanced wastewater treatment.
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Affiliation(s)
- Jiahao Fu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Ziyuan Lin
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Pengcheng Zhao
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Yingmu Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Lei He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Jian Zhou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
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Huang W, She Z, Gao M, Wang Q, Jin C, Zhao Y, Guo L. Effect of anaerobic/aerobic duration on nitrogen removal and microbial community in a simultaneous partial nitrification and denitrification system under low salinity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:859-870. [PMID: 30253368 DOI: 10.1016/j.scitotenv.2018.09.218] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 09/13/2018] [Accepted: 09/14/2018] [Indexed: 05/25/2023]
Abstract
In this study, the simultaneous partial nitrification and denitrification (SPND) process was investigated in a hybrid sequencing batch biofilm reactor (HSBBR) fed with synthetic wastewater with 1.2% salinity. Different anaerobic/aerobic (An/Ae) durations were selected for evaluating the removal performance of contaminants and the succession of the microbial community in the reactor. The highest organic matter removal efficiency was obtained at An/Ae hour ratio of 0/6.5, with an average chemical oxygen demand (COD) removal of 89.6% at the steady state. Similarly high nitrogen removal efficiencies were achieved at An/Ae hour ratios of 1/5.5, 1.5/5 and 2/4.5,with over 92% of average total nitrogen removed. This represents an increase of more than 10% compared to the mode with An/Ae hour ratio of 0/6.5. High-throughput sequencing analysis revealed that the increase of the An/Ae hour ratio changed the characteristics of the community structures in the HSBBR. Azoarcus was the most dominant genus when the An/Ae hour ratio was 0/6.5 in both suspended sludge (S-sludge) and biofilm, while Candidatus_Competibacter was the most abundant genus at An/Ae hour ratios of 2/4.5 and 3/3.5. Nitrosomonas was the only ammonia oxidizing bacteria (AOB) detected in this study. Nitrospira, a kind of nitrite oxidizing bacteria (NOB), was sensitive to salinity and altering the An/Ae mode; this was detected only in S-sludge samples in a fully aerobic mode with a low percentage of 0.1%. S-sludge and biofilm samples shared a similar bacterial composition. This research demonstrated that efficient nitrogen and carbon removal could be achieved via the SPND process by the symbiotic functional groups in a hybrid S-sludge and biofilm reactor.
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Affiliation(s)
- Wuyi Huang
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China
| | - Zonglian She
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China.
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Qun Wang
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China
| | - Chunji Jin
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Yangguo Zhao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
| | - Liang Guo
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China, 266100 Qingdao, China
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Hou B, Kuang Y, Han H, Liu Y, Ren B, Deng R, Hursthouse AS. Enhanced performance and hindered membrane fouling for the treatment of coal chemical industry wastewater using a novel membrane electro-bioreactor with intermittent direct current. BIORESOURCE TECHNOLOGY 2019; 271:332-339. [PMID: 30292132 DOI: 10.1016/j.biortech.2018.09.063] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
A membrane electro-bioreactor (MEBR) embracing biological treatment, electrokinetic phenomena and membrane filtration was established by applying intermittent direct current (DC) to MBR. MEBR exhibited significant improvement of treatment performance and reduction of membrane fouling. COD and total phenols removal efficiencies increased to 83.53% and 93.28% at an exposure mode of 24'-OFF/6'-ON, compared to 71.24% and 82.43% in MBR. Trans-membrane pressure increment rate declined dramatically in MEBR, which was mainly attributed to the increase of sludge floc size and decrease of zeta potential, soluble microbial products and specific resistance to filtration, resulted from electrokinetic effects such as electrocoagulation, electrophoresis, electroosmosis and electromigration of ions. It was notable that DC exposure exerted distinct evolution on microbial community, with the improvement of microbial community richness and diversity. The relative abundances of functional genera were promoted noticeably in MEBR. An interactive relevance existed among microbial community structure, mixed liquor properties and operational parameters.
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Affiliation(s)
- Baolin Hou
- Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
| | - Yu Kuang
- Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ye Liu
- Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Bozhi Ren
- Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Renjian Deng
- Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Andrew S Hursthouse
- Hunan Provincial Key Laboratory of Shale Gas Resource Utilization, School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; School of Science & Sport, University of the West of Scotland, Paisley PA1 2BE, UK
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Zhang X, Zhao B, Meng J, Zhou A, Yue X, Niu Y, Cui Y. Efficiency, granulation, and bacterial populations related to pollutant removal in an upflow microaerobic sludge reactor treating wastewater with low COD/TN ratio. BIORESOURCE TECHNOLOGY 2018; 270:147-155. [PMID: 30216924 DOI: 10.1016/j.biortech.2018.08.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 07/31/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
In this study, a novel upflow microaerobic sludge reactor (UMSR) was constructed to conduct anaerobic digestion of municipal wastewater with low carbon and nitrogen ratio (C/N). Oxygen in the UMSR was supplied by falling water and external recirculation. Excellent nitrogen removal performance was obtained in the UMSR for treating wastewater with low C/N ratio at a temperature of 25 °C and a hydraulic retention time of 24 h. Ammonium and total nitrogen removal efficiencies averaged 92.35% and 90.41%, respectively, and sludge granulation occurred during acclimation. The inferred metabolism of nitrogen removal and ecological positions of functional microbe were integrated into a granule model by scanning electron microscopy. Additionally, the analysis of microbial community indicated that aerobic nitrifying bacteria and heterotrophic bacteria survived on the surface of sludge floc and granules while the anaerobic autotrophic, heterotrophic denitrifying, and anaerobic ammonia oxidation bacteria were present in the inner layer.
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Affiliation(s)
- Xiao Zhang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Bowei Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Jia Meng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
| | - Yukun Niu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Ying Cui
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
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Gu YQ, Li TT, Li HQ. Biofilm formation monitored by confocal laser scanning microscopy during startup of MBBR operated under different intermittent aeration modes. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.08.032] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Xu H, Tong N, Huang S, Hayat W, Fazal S, Li J, Li S, Yan J, Zhang Y. Simultaneous autotrophic removal of sulphate and nitrate at different voltages in a bioelectrochemical reactor (BER): Evaluation of degradation efficiency and characterization of microbial communities. BIORESOURCE TECHNOLOGY 2018; 265:340-348. [PMID: 29913289 DOI: 10.1016/j.biortech.2018.06.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/11/2018] [Accepted: 06/12/2018] [Indexed: 06/08/2023]
Abstract
The autotrophic removal of sulphate and nitrate in bioelectrochemical reactors was investigated at different external voltages (0.2, 0.4, 0.6, 0.8 and 1.0 V) under anaerobic conditions. Sulphate and nitrate removal, nitrite accumulation, reduction trend of nitrate and sulphate and microbial community structure were explored. Results indicate the highest removal efficiencies of nitrate and sulphate at 43.3 ± 2.8 and 7.1 ± 0.2 mg·l-1·d-1 when the voltage is 0.6 V. Moreover, nitrite accumulation decreases with increased voltage from 0.2 V to 1.0 V. Illumina high-throughput sequencing results show similar richness and diversity of bacterial species with increased voltage from 0.2 V to 0.8 V. However, with further increased voltage to 1.0 V, bacterial diversity and richness decrease significantly. Overall, significant differences in community compositions are observed at different voltages.
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Affiliation(s)
- Hao Xu
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Na Tong
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China.
| | - Waseem Hayat
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Saima Fazal
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
| | - Jianjun Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratrory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, PR China
| | - Shuang Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Jinwu Yan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Yongqing Zhang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China
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Zhang X, Zhou Y, Zhao S, Zhang R, Peng Z, Zhai H, Zhang H. Effect of Fe (II) in low-nitrogen sewage on the reactor performance and microbial community of an ANAMMOX biofilter. CHEMOSPHERE 2018; 200:412-418. [PMID: 29501031 DOI: 10.1016/j.chemosphere.2018.02.131] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/01/2018] [Accepted: 02/21/2018] [Indexed: 06/08/2023]
Abstract
In this study, the effect of Fe (II) on Anaerobic Ammonium Oxidation (ANAMMOX) process was investigated by step-wise increasing the Fe (II) in influent from 1 to 50 mg L-1. The nitrogen removal, biofilm property and the microbial community were analyzed in each phase. Results showed that, the anaerobic ammonia-oxidizing bacteria (AAOB) bioactivity and the nitrogen removal of ANAMMOX system were slightly improved to 0.58 from the initial 0.51 kg m-3 d-1 by Fe (II) in 1-5 mg L-1. The nitrogen removal was suppressed and could recover to the initial level during the same period under 10-20 mg L-1 Fe (II), while it did not recover to the initial level under 30 mg L-1 Fe (II) and showed no recovery performance under 50 mg L-1 Fe (II). The irreversible suppression threshold of Fe (II) was calculated as 50 mg L-1. The iron content in ANAMMOX biofilm presented linear correlation with the influent Fe (II) in 1-20 mg L-1, which then tended to be stable when Fe (II) was higher. Dehydrogenase activity (DHA) showed similar and faster response to Fe (II) than the microbial activity, and it was an effective pre-indicator for the nitrogen removal performance in the ANAMMOX system suffered Fe (II). The Fe (II) feeding firstly led to the relative abundance of AAOB decreased to 11.04% from the initial 35.46%, and finally picked up to 19.39% after the long-term acclimatization.
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Affiliation(s)
- Xiaojing Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
| | - Yue Zhou
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Siyu Zhao
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Rongrong Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Zhaoxue Peng
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Hanfei Zhai
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Hongzhong Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
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Zhang Q, Wang C, Jiang L, Qi J, Wang J, He X. Impact of dissolved oxygen on the microbial community structure of an intermittent biological aerated filter (IBAF) and the removal efficiency of gasification wastewater. BIORESOURCE TECHNOLOGY 2018; 255:198-204. [PMID: 29414167 DOI: 10.1016/j.biortech.2018.01.115] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/15/2018] [Accepted: 01/22/2018] [Indexed: 06/08/2023]
Abstract
A novel IBAF system (altered conventional biological aerated filter (BAF) for intermittent aeration) was used to treat BDD anodes electrochemical oxidation gasification wastewater effluent, after which 454 pyrosequencing was applied to investigate the bacterial community of IBAF and demonstrate the relationship between dissolved oxygen (DO) and the bacterial community. The results showed that the concentration of COD, NH4+-N and NO3--N reached 55.08, 7.64 and 7.76 mg/L, respectively, in IBAF effluent because of changes in the DO concentration at 30 days after system start-up. The bacterial community results revealed that the 40 cm sample had the highest bacterial diversity. The bacterial species were approximate in total samples at phylum and family level, but the relative abundance was significantly different because of change in DO concentration. In addition, sample distance analysis indicated that the similarity of different samples was related to the DO concentration at different heights.
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Affiliation(s)
- Qi Zhang
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China
| | - Chunrong Wang
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China.
| | - Longxin Jiang
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China
| | - Ji Qi
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China
| | - Jianbing Wang
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China
| | - Xuwen He
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China
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Chen H, Li A, Wang Q, Cui D, Cui C, Ma F. Nitrogen removal performance and microbial community of an enhanced multistage A/O biofilm reactor treating low-strength domestic wastewater. Biodegradation 2018; 29:285-299. [DOI: 10.1007/s10532-018-9829-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 04/06/2018] [Indexed: 12/20/2022]
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