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Jiang X, Wang M, Yang S, He D, Fang F, Yang L. The response of structure and nitrogen removal function of the biofilm on submerged macrophytes to high ammonium in constructed wetlands. J Environ Sci (China) 2024; 142:129-141. [PMID: 38527879 DOI: 10.1016/j.jes.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/27/2023] [Accepted: 07/04/2023] [Indexed: 03/27/2024]
Abstract
The ammonium exceedance discharge from sewage treatment plants has a great risk to the stable operation of subsequent constructed wetlands (CWs). The effects of high ammonium shocks on submerged macrophytes and epiphytic biofilms on the leaves of submerged macrophytes in CWs were rarely mentioned in previous studies. In this paper, the 16S rRNA sequencing method was used to investigate the variation of the microbial communities in biofilms on the leaves of Vallisneria natans plants while the growth characteristics of V. natans plants were measured at different initial ammonium concentrations. The results demonstrated that the total chlorophyll and soluble sugar synthesis of V. natans plants decreased by 51.45% and 57.16%, respectively, and malondialdehyde content increased threefold after 8 days if the initial NH4+-N concentration was more than 5 mg/L. Algal density, bacterial quantity, dissolved oxygen, and pH increased with high ammonium shocks. The average removal efficiencies of total nitrogen and NH4+-N reached 73.26% and 83.94%, respectively. The heat map and relative abundance analysis represented that the relative abundances of phyla Proteobacteria, Cyanobacteria, and Bacteroidetes increased. The numbers of autotrophic nitrifiers and heterotrophic nitrification aerobic denitrification (HNAD) bacteria expanded in biofilms. In particular, HNAD bacteria of Flavobacterium, Hydrogenophaga, Acidovorax, Acinetobacter, Pseudomonas, Aeromonas, and Azospira had higher abundances than autotrophic nitrifiers because there were organic matters secreted from declining leaves of V. natans plants. The analysis of the nitrogen metabolic pathway showed aerobic denitrification was the main nitrogen removal pathway. Thus, the nitrification and denitrification bacterial communities increased in epiphytic biofilms on submerged macrophytes in constructed wetlands while submerged macrophytes declined under ammonium shock loading.
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Affiliation(s)
- Xue Jiang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Mengmeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shunqing Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Di He
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Fei Fang
- School of Resources and Environment, Anqing Normal University, Anqing 246133, China
| | - Liuyan Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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2
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Liu M, Xia M, Li X, Li Y, Wu J. Removal efficiency and abundance of nitrogen cycling microorganism in three bio-matrix materials to treat swine wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:42991-43004. [PMID: 38880844 DOI: 10.1007/s11356-024-33997-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 06/11/2024] [Indexed: 06/18/2024]
Abstract
A bio-matrix material (BMM) system is used to pretreat swine wastewater and reduce the nitrogen (N) concentration to the tolerance range of plants in constructed wetlands. In this study, rice straw (RS), wheat straw (WS), and corn stalk (CS) were applied to treat pollutants from swine wastewater, respectively. This one year-long field experiment make up for the lack of long-term experiments and mechanistic investigations of BMM. The pollutant removal efficiency, degradation process of crop straw, and the abundance of nitrogen cycling genes were determined in different BMM systems. The results showed that the removal efficiency of COD, TN, NH4+, and NO3- was the best in the initial 6 months. Furthermore, RS and WS exhibited favorable annual removal efficiency of TN and NH4+, which were 32.81% and 32.99%, 35.3% and 34.97%, respectively. Moreover, the removal efficiency of COD was 30.81% in three BMM systems. Meanwhile, it was found that the dry matter (DM) degradation of crop straws was fast in the first 4-5 months. The degradation rates of cellulose, hemicellulose, and lignin were 94.19%, 94.36%, and 87.32%, respectively, in 1 year. The abundance of nitrogen cycling genes significantly increased by adding BMM, compared with CK (P < 0.05). This showed the abundance of the hzsB gene in RS was the highest, while nirK, nirS, AOA, and AOB were the highest in WS. The addition of RS and WS was better than that of CS in promoting the abundance of nitrogen cycling microorganisms. The results indicated that adding BMM could enhance the anaerobic ammonia oxidation, nitrification, and denitrification. This study not only extends our comprehension of BMM mechanisms in swine wastewater treatment but also serves as a guiding light for numerous farms in similar climate regions.
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Affiliation(s)
- Mingyu Liu
- Key Laboratory of Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Menghua Xia
- Key Laboratory of Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xi Li
- Key Laboratory of Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China.
- Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China.
| | - Yuyuan Li
- Key Laboratory of Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
| | - Jinshui Wu
- Key Laboratory of Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan, 410125, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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3
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Zhang X, Song X, Cheng X, Huang Z, Dong D, Li X. Enhanced denitrification of biodegradable polymers using Bacillus pumilus in aerobic denitrification bioreactors: Performance and mechanism. BIORESOURCE TECHNOLOGY 2024; 394:130240. [PMID: 38160849 DOI: 10.1016/j.biortech.2023.130240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/20/2023] [Accepted: 12/20/2023] [Indexed: 01/03/2024]
Abstract
Nitrate accumulation is an important issue that affects animal health and causes eutrophication. This study combined biodegradable polymers with degrading bacteria to lead to high denitrification efficiency. The results showed polycaprolactone had the highest degradation and carbon release rate (0.214 mg/g∙d) and nitrogen removal was greatest when the Bacillus pumilus and Halomonas venusta ratio was 1:2. When the hydraulic retention time was extended to 12 h, the nitrate removal rate for H. venusta with B. pumilus and polycaprolactone increased by 48 %. Furthermore, the group with B. pumilus contained more Proteobacteria (77.34 %) and denitrifying functional enzymes than the group without B. pumilus. These findings indicated B.pumilus can enhance the degradation of biodegradable polymers especially polycaprolactone to improve the denitrification of the aerobic denitrification bacteria H.venusta when treating maricultural wastewater.
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Affiliation(s)
- Xiangyu Zhang
- Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, Qingdao, Shandong Province 266003, China
| | - Xiefa Song
- Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, Qingdao, Shandong Province 266003, China
| | - Xiaojing Cheng
- Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, Qingdao, Shandong Province 266003, China
| | - Zhitao Huang
- Norwegian Institute for Water Research (NIVA), Thormøhlengate 53 D, 5006 Bergen, Norway
| | - Dengpan Dong
- Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, Qingdao, Shandong Province 266003, China
| | - Xian Li
- Key Laboratory of Mariculture (Ministry of Education), Fisheries College, Ocean University of China, Qingdao, Shandong Province 266003, China.
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4
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Niu S, Gao S, Zhang K, Li Z, Wang G, Li H, Xia Y, Tian J, Yu E, Xie J, Zhang M, Gong W. Effects of hydraulic retention time and influent nitrate concentration on solid-phase denitrification system using wheat husk as carbon source. PeerJ 2023; 11:e15756. [PMID: 37520256 PMCID: PMC10373648 DOI: 10.7717/peerj.15756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/26/2023] [Indexed: 08/01/2023] Open
Abstract
Solid-phase denitrification shows promise for removing nitrate (NO3--N) from water. Biological denitrification uses external carbon sources to remove nitrogen from wastewater, among which agriculture waste is considered the most promising source due to its economic and efficiency advantages. Hydraulic retention time (HRT) and influent nitrate concentration (INC) are the main factors influencing biological denitrification. This study explored the effects of HRT and INC on solid-phase denitrification using wheat husk (WH) as a carbon source. A solid-phase denitrification system with WH carbon source was constructed to explore denitrification performance with differing HRT and INC. The optimal HRT and INC of the wheat husk-denitrification reactor (WH-DR) were 32 h and 50 mg/L, respectively. Under these conditions, NO3--N and total nitrogen removal rates were 97.37 ± 2.68% and 94.08 ± 4.01%, respectively. High-throughput sequencing revealed that the dominant phyla in the WH-DR operation were Proteobacteria, Bacteroidetes, and Campilobacterota. Among the dominant genera, Diaphorobacter (0.85%), Ideonella (0.38%), Thiobacillus (4.22%), and Sulfurifustis (0.60%) have denitrification functions; Spirochaeta (0.47%) is mainly involved in the degradation of WH; and Acidovorax (0.37%) and Azospira (0.86%) can both denitrify and degrade WH. This study determined the optimal HRT and INC for WH-DR and provides a reference for the development and application of WH as a novel, slow-release carbon source in treating aquaculture wastewater.
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Affiliation(s)
- Shuhui Niu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Shuwei Gao
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Kai Zhang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Zhifei Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Guangjun Wang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Hongyan Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Yun Xia
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Jingjing Tian
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Ermeng Yu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Jun Xie
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
| | - Minting Zhang
- Guangdong Shunde Junjian Modern Agricultural Technology Co., Ltd, Foshan, China
| | - Wangbao Gong
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China
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5
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Tadda MA, Gouda M, Shitu A, Yu Q, Zhao X, Ying L, Zhu S, Liu D. Baobab fruit powder promotes denitrifiers’ abundance and improves poly(butylene succinate) biodegradation for a greener environment. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2023; 11:109654. [DOI: 10.1016/j.jece.2023.109654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
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6
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Zhong J, Liu J, Hu R, Pan D, Shao S, Wu X. Performance of nitrification-denitrification and denitrifying phosphorus removal driven by in-situ generated biogenic manganese oxides in a moving bed biofilm reactor. BIORESOURCE TECHNOLOGY 2023; 377:128957. [PMID: 36965588 DOI: 10.1016/j.biortech.2023.128957] [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: 03/06/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
Simultaneous removal of NH4+-N, NO3--N, COD, and P by manganese redox cycling in nutrient wastewater was established with two moving bed biofilm reactors (MBBRs) with in-situ generated biogenic manganese oxides (BioMnOx) and non-BioMnOx. In-situ generated BioMnOx preferentially promoted the denitrification, and the average removal of NO3--N, NH4+-N, and TN in the experimental MBBR with BioMnOx increased to 89.00%, 70.64%, and 76.06% compared with the control MBBR with non-BioMnOx. The relevant enzymes activity, extracellular polymeric substance (EPS), electron transport system activity (ETSA), and reactive oxygen species (ROS) were investigated. The element valence and morphology of purified BioMnOx were characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), as well as the effect of BioMnOx on nitrogen and phosphorus removal. The results suggested that BioMnOx could improve nitrogen conversion. Electrochemical characteristic and microbial community were detected. This study provided a new strategy for nutrients removal in BioMnOx-mediated wastewater treatment.
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Affiliation(s)
- Jinfeng Zhong
- College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China
| | - Jiamin Liu
- College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China
| | - Rui Hu
- College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China
| | - Dandan Pan
- College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China
| | - Sicheng Shao
- College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China.
| | - Xiangwei Wu
- College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China
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7
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Cargnin JMR, Júnior HLP, João JJ. Sustainable technology: potential of biomass (Bambusa tuldoides) for biological denitrification of wastewater generated in shrimp farming. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:736. [PMID: 37233845 DOI: 10.1007/s10661-023-11351-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 05/04/2023] [Indexed: 05/27/2023]
Abstract
Wastewater from shrimp farming is rich in organic material, solids, and nutrients, which cause a series of environmental problems when released into the environment. Currently, for the removal of nitrogen compounds from wastewater, among the most studied methods is biological denitrification. The objective of this study was to evaluate the operational parameters for the development of a more sustainable technology for the removal of nitrogen compounds from shrimp farm wastewater, using Bambusa tuldoides (a species of bamboo) as a source of carbon and a material conducive to the development of selected denitrifying bacteria. To optimize the process, biological denitrification assays were performed varying the following parameters: bamboo length (cm), pH, temperature, and stoichiometric proportions of C and N. The operational stability of the process with the reuse of the bamboo biomass was also evaluated. Cronobacter sakazakii and Bacillus cereus were identified as denitrifying microorganisms present in reactor with bamboo biomass. The best operational conditions observed were pH 6 to 7 and temperature 30 to 35 °C, and the addition of an external carbon source was not necessary for the denitrification process to occur efficiently. Under these conditions, biological denitrification occurred with an average efficiency above 90% based on the removal of the nitrogen contaminants evaluated (NO3-N and NO2-N). Regarding operational stability, 8 cycles were performed using the same source of carbon without reducing the efficiency of the process.
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Affiliation(s)
| | - Harry Luiz Pilz Júnior
- Postgraduate Program in Environmental Microbiology, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande Do Sul, Brazil
| | - Jair Juarez João
- Postgraduate Program in Environmental Sciences, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil.
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8
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Yang Z, Lou Y, Pan H, Wang H, Yang Q, Zhuge Y, Hu J. Improved Denitrification Performance of Polybutylene Succinate/Corncob Composite Carbon Source by Proper Pretreatment: Performance, Functional Genes and Microbial Community Structure. Polymers (Basel) 2023; 15:polym15040801. [PMID: 36850087 PMCID: PMC9958998 DOI: 10.3390/polym15040801] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
Blending biodegradable polymers with plant materials is an effective method to improve the biodegradability of solid carbon sources and save denitrification costs, but the recalcitrant lignin in plant materials hinders the microbial decomposition of available carbon sources. In the present study, corncob pretreated by different methods was used to prepare polybutylene succinate/corncob (PBS/corncob) composites for biological denitrification. The PBS/corncob composite with alkaline pretreatment achieved the optimal NO3--N removal rate (0.13 kg NO3--N m-3 day-1) with less adverse effects. The pretreatment degree, temperature, and their interaction distinctly impacted the nitrogen removal performance and dissolved organic carbon (DOC) release, while the N2O emission was mainly affected by the temperature and the interaction of temperature and pretreatment degree. Microbial community analysis showed that the bacterial community was responsible for both denitrification and lignocellulose degradation, while the fungal community was primarily in charge of lignocellulose degradation. The outcomes of this study provide an effective strategy for improving the denitrification performance of composite carbon sources.
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Wu H, Li A, Yang X, Wang J, Liu Y, Zhan G. The research progress, hotspots, challenges and outlooks of solid-phase denitrification process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159929. [PMID: 36356784 DOI: 10.1016/j.scitotenv.2022.159929] [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: 08/23/2022] [Revised: 10/30/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen pollution is one of the main reasons for water eutrophication. The difficulty of nitrogen removal in low-carbon wastewater poses a huge potential threat to the ecological environment and human health. As a clean biological nitrogen removal process, solid-phase denitrification (SPD) was proposed for long-term operation of low-carbon wastewater. In this paper, the progress, hotspots, and challenges of the SPD process based on different solid carbon sources (SCSs) are reviewed. Compared with synthetic SCS and natural SCS, blended SCSs have more application potential and have achieved pilot-scale application. Differences in SCSs will lead to changes in the enrichment of hydrolytic microorganisms and hydrolytic genes, which indirectly affect denitrification performance. Moreover, the denitrification performance of the SPD process is also affected by the physical and chemical properties of SCSs, pH of wastewater, hydraulic retention time, filling ratio, and temperature. In addition, the strengthening of the SPD process is an inevitable trend. The strengthening measures including SCSs modification and coupled electrochemical technology are regarded as the current research hotspots. It is worth noting that the outbreak of the COVID-19 epidemic has led to the increase of disinfection by-products and antibiotics in wastewater, which makes the SPD process face challenges. Finally, this review proposes prospects to provide a theoretical basis for promoting the efficient application of the SPD process and coping with the challenge of the COVID-19 epidemic.
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Affiliation(s)
- Heng Wu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Anjie Li
- College of Grassland and Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xu Yang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Jingting Wang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Yiliang Liu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Guoqiang Zhan
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
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10
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Sun Q, Zhu G. Simultaneous denitrification and antibiotic degradation of low-C/N-ratio wastewater by a three-dimensional biofilm-electrode reactor: Performance and microbial response. ENVIRONMENTAL RESEARCH 2022; 210:112856. [PMID: 35150713 DOI: 10.1016/j.envres.2022.112856] [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: 11/27/2021] [Revised: 01/21/2022] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
Three-dimensional biofilm-electrode reactors (3D-BERs) were fabricated and used to simultaneously remove nitrate and metronidazole (MNZ) from low-C/N-ratio wastewater. The results showed that 1 mg/L MNZ significantly promoted nitrate removal. After MNZ was added to the reactor, the removal efficiencies of total nitrogen (TN) and NO3--N increased significantly from 18.97% and 52.09% to 71.63% and 99.98% within 6 h, respectively. The MNZ-removal kinetics conformed to a pseudo-first-order model, and the removal rate constant reached a maximum value of 0.853 h-1, which was 4.1 and 2.8 times higher than that of pure microorganisms and pure electrochemical reactors, respectively. This indicated that the 3D-BERs constructed in this study were capable of simultaneous MNZ degradation and denitrification. In the presence of nitrate, six MNZ-degradation intermediates were identified, and four MNZ transformation pathways were proposed, including cleavage of hydroxyethyl groups, reduction of nitro groups, N-denitration, and deprotonation of side-chain hydroxyl groups. High-throughput sequencing revealed that the reactor was rich in various MNZ-degraders and denitrifiers, such as Hydrogenophaga, Methylomonas, Crenohrix, Dechloromonas, and Methylophilus. A function prediction analysis of nitrogen metabolism showed that the 3D-BER reactor with MNZ had higher denitrification activity than the other reactors tested. It was speculated that the intermediates produced by MNZ could act as carbon sources allowing denitrifying bacteria to perform denitrification, which made a nonnegligible contribution to the removal of nitrogen.
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Affiliation(s)
- Qi Sun
- School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, Jiangsu, 210096, China
| | - Guangcan Zhu
- School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, Jiangsu, 210096, China.
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11
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Wang Z, Zheng M, He C, Hu Z, Yu Y, Wang W. Enhanced treatment of low-temperature and low carbon/nitrogen ratio wastewater by corncob-based fixed bed bioreactor coupled sequencing batch reactor. BIORESOURCE TECHNOLOGY 2022; 351:126975. [PMID: 35276374 DOI: 10.1016/j.biortech.2022.126975] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
In this study, a combined corncob-based fixed bed bioreactor and sequencing batch reactor system (CCF-SBR) was developed to treat low-temperature (3-12 °C) and low carbon/nitrogen ratio (C/N = 2) wastewater with a single SBR as the control. Results showed similarly low COD concentration of CCF-SBR (20.4 ± 3.7 mg·L-1) and control SBR (24.9 ± 6.7 mg·L-1) effluent. However, the total nitrogen (TN) removal rate of CCF-SBR was significantly higher than that of control SBR (29.6 ± 2.7% vs 8.6 ± 2.3%). According to the nitrification and denitrification activities and the analysis of microbial community, CCF mainly played the role of denitrification based on fermentation genera and denitrifying genera, and SBR mainly implemented nitrification with Nitrospira and Acinetobacter. This study explores a promising way for agricultural waste resource utilization and wastewater treatment under low-temperature and low C/N ratio.
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Affiliation(s)
- Zhiming Wang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei 230009, China; Anhui Province Key Laboratory of Industrial Wastewater and Environmental Treatment, Hefei 230024, China
| | - Mengqi Zheng
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei 230009, China; Anhui Province Key Laboratory of Industrial Wastewater and Environmental Treatment, Hefei 230024, China.
| | - Chunhua He
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei 230009, China; Anhui Province Key Laboratory of Industrial Wastewater and Environmental Treatment, Hefei 230024, China
| | - Zhenhu Hu
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei 230009, China; Anhui Province Key Laboratory of Industrial Wastewater and Environmental Treatment, Hefei 230024, China
| | - Yipeng Yu
- Hefei Municipal Design Institute Co., Ltd, Hefei 230041, China
| | - Wei Wang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei 230009, China; Anhui Province Key Laboratory of Industrial Wastewater and Environmental Treatment, Hefei 230024, China
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12
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Fu X, Hou R, Yang P, Qian S, Feng Z, Chen Z, Wang F, Yuan R, Chen H, Zhou B. Application of external carbon source in heterotrophic denitrification of domestic sewage: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 817:153061. [PMID: 35026271 DOI: 10.1016/j.scitotenv.2022.153061] [Citation(s) in RCA: 91] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 06/14/2023]
Abstract
The carbon source is essential as an electron donor in the heterotrophic denitrification process. When there is a lack of organic carbon sources in the system, an external carbon source is needed to improve denitrification efficiency. This review compiles the effects of liquid, solid and gaseous carbon sources on denitrification. Sodium acetate has better denitrification efficiency and is usually the first choice for external carbon sources. Fermentation by-products have been demonstrated to have the same denitrification efficiency as sodium acetate. Compared with cellulose-rich materials, biodegradable polymers have better and more stable denitrification performance in solid-phase nitrification, but their price is higher than the former. Methane as a gaseous carbon source is studied mainly by aerobic methane oxidation coupled with denitrification, which is feasible using methane as a carbon source. Liquid carbon sources are better controlled and utilized than solid carbon sources and gaseous carbon sources. In addition, high carbon to nitrogen ratio and hydraulic retention time can promote denitrification, while high dissolved oxygen (DO>2.0 mg L-1) will inhibit the denitrification process. At the same time, high temperature is conducive to the decomposition of carbon sources by microorganisms. This review also considers the advantages and disadvantages of different carbon sources and cost analysis to provide a reference for looking for more economical and effective external carbon sources in the future.
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Affiliation(s)
- Xinrong Fu
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Rongrong Hou
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Peng Yang
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Shengtao Qian
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhuqing Feng
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhongbing Chen
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha, Suchdol 165 00, Czech Republic
| | - Fei Wang
- School of Environment, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, 100875, Beijing, China
| | - Rongfang Yuan
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China.
| | - Huilun Chen
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China.
| | - Beihai Zhou
- School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
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13
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Xia L, Li X, Fan W, Wang J. Denitrification performance and microbial community of bioreactor packed with PHBV/PLA/rice hulls composite. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 803:150033. [PMID: 34492486 DOI: 10.1016/j.scitotenv.2021.150033] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/16/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
In this study, a novel biodegradable PHBV/PLA/rice hulls (PPRH) composite was applied and tested as biofilm attachment carrier and carbon source in two bioreactors for biological denitrification process. The denitrification performance, effect of operational conditions and microbial community structure of PPRH biofilm were evaluated. The batch experiment results showed that PPRH-packed bioreactor could completely remove 50 mg L-1 of NO3--N at natural pH (ca. 7.5) and room temperature. The continuous flow experiments indicated that high NO3--N removal efficiency (77%-99%) was achieved with low nitrite (<0.48 mg L-1) and ammonia (<0.81 mg L-1) accumulation, when influent NO3--N concentration was 30 mg L-1 and hydraulic retention time was 2-6 h. Furthermore, the microbial community analysis indicated that bacteria belonging to genus Diaphorobacter in phylum Proteobacteria were the most dominant and major denitrifiers in denitrification. In summary, PPRH composite was a promising carbon source for biological nitrate removal from water and wastewater.
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Affiliation(s)
- Lin Xia
- School of Space and Environment, Beihang University, No. 37, XueYuan Road, Haidian District, Beijing 100191, PR China; Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China
| | - Xiaomin Li
- School of Space and Environment, Beihang University, No. 37, XueYuan Road, Haidian District, Beijing 100191, PR China
| | - Wenhong Fan
- School of Space and Environment, Beihang University, No. 37, XueYuan Road, Haidian District, Beijing 100191, PR China
| | - Jianlong Wang
- Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing 100084, PR China.
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14
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Tadda MA, Gouda M, Lin X, Shitu A, Abdullahi HS, Zhu S, Li X, Liu D. Impacts of Baobab (Adansonia digitata) Powder on the Poly(Butylene Succinate) Polymer Degradability to Form an Eco-Friendly Filler-Based Composite. FRONTIERS IN MATERIALS 2021; 8. [DOI: 10.3389/fmats.2021.768960] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Poly (butylene succinate) (PBS) is one of the most common biodegradable plastic polymers that has recently been used in the green environmental field. Enhancement of physicochemical characteristics of these polymers by using plant-based materials like Baobab (Adansonia digitata) will improve its industrial application. This study evaluated Baobab (Adansonia digitata) powder (BP) and PBS composites under various ratios (PBS/BP: 90/10, 80/20, 70/30, 60/40, and 50/50 wt%) for their thermo-mechanical and other physicochemical properties for the industrial application. The nanoscale morphological and elemental characterization were also measured by scanning electron microscope-dispersive X-ray spectroscopy (SEM-EDS). The results revealed that PBS/BP blends of 90/10 and 50/50 showed a significantly reduced melting temperature (Tm) up to 94°C (p < 0.05) compared to PBS (114°C). Also, the dynamic viscosity, storage modulus, and loss modulus showed a significant decrease with increasing the ratio of BP in PBS/BP composite, which confirmed faster degradation than the pure PBS. In conclusion, the novel PBS/BP biomaterial is recommended for use as a carbon source for denitrification processes, as an eco-friendly faster degradable natural filler-based polymer. Besides, they could be use in food packaging and biomedical industries.
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15
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Zhang F, Ma C, Huang X, Liu J, Lu L, Peng K, Li S. Research progress in solid carbon source-based denitrification technologies for different target water bodies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 782:146669. [PMID: 33839669 DOI: 10.1016/j.scitotenv.2021.146669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 02/25/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
Nitrogen pollution in water bodies is a serious environmental issue which is commonly treated by various methods such as heterotrophic denitrification. In particular, solid carbon source (SCS)-based denitrification has attracted widespread research interest due to its gradual carbon release, ease of management, and long-term operation. This paper reviews the types and properties of SCSs for different target water bodies. While both natural (wheat straw, wood chips, and fruit shells) and synthetic (polybutylene succinate, polycaprolactone, polylactic acid, and polyhydroxyalkanoates) SCSs are commonly used, it is observed that the denitrification performance of the synthetic sources is generally superior. SCSs have been used in the treatment of wastewater (including aquaculture wastewater), agricultural subsurface drainage, surface water, and groundwater; however, the key research aspects related to SCSs differ markedly based on the target waterbody. These key research aspects include nitrogen pollutant removal rate and byproduct accumulation (ordinary wastewater); water quality parameters and aquatic product yield (recirculating aquaculture systems); temperature and hydraulic retention time (agricultural subsurface drainage); the influence of dissolved oxygen (surface waters); and nitrate-nitrogen load, HRT, and carbon source dosage on denitrification rate (groundwater). It is concluded that SCS-based denitrification is a promising technique for the effective elimination of nitrate-nitrogen pollution in water bodies.
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Affiliation(s)
- Feifan Zhang
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, People's Republic of China
| | - Chengjin Ma
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, People's Republic of China
| | - Xiangfeng Huang
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, People's Republic of China
| | - Jia Liu
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, People's Republic of China
| | - Lijun Lu
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, People's Republic of China
| | - Kaiming Peng
- College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, People's Republic of China
| | - Shiyang Li
- Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and chemical engineering, Shanghai University, Shanghai 200092, People's Republic of China.
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16
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A Review on Green Composites Based on Natural Fiber-Reinforced Polybutylene Succinate (PBS). Polymers (Basel) 2021; 13:polym13081200. [PMID: 33917740 PMCID: PMC8068185 DOI: 10.3390/polym13081200] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/03/2021] [Accepted: 04/04/2021] [Indexed: 11/17/2022] Open
Abstract
The need for utilization of environmentally friendly materials has emerged due to environmental pollution that is caused by non-biodegradable materials. The usage of non-biodegradable plastics has increased in the past decades in many industries, and, as a result, the generation of non-biodegradable plastic wastes has also increased. To solve the problem of non-biodegradable plastic wastes, there is need for fabrication of bio-based polymers to replace petroleum-based polymers and provide strategic plans to reduce the production cost of bioplastics. One of the emerging bioplastics in the market is poly (butylene succinate) (PBS) and it has been the biopolymer of choice due to its biodegradability and environmental friendliness. However, there are some disadvantages associated with PBS such as high cost, low gas barrier properties, and softness. To lower the cost of PBS and enhance its properties, natural lignocellulosic fibers are incorporated into the PBS matrix, to form environmentally friendly composites. Natural fiber-based biocomposites have emerged as materials of interest in important industries such as packaging, automobile, and construction. The bonding between the PBS and natural fibers is weak, which is a major problem for advanced applications of this system. As a result, this review paper discusses various methods that are employed for surface modification of the Fibers The paper provides an in-depth discussion on the preparation, modification, and morphology of the natural fiber-reinforced polybutylene succinate biocomposites. Furthermore, because the preparation as well as the modification of the fiber-reinforced biocomposites have an influence on the mechanical properties of the biocomposites, mechanical properties of the biocomposites are also discussed. The applications of the natural fiber/PBS biocomposites for different systems are also reported.
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17
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Yang Z, Sun H, Zhou Q, Zhao L, Wu W. Nitrogen removal performance in pilot-scale solid-phase denitrification systems using novel biodegradable blends for treatment of waste water treatment plants effluent. BIORESOURCE TECHNOLOGY 2020; 305:122994. [PMID: 32105842 DOI: 10.1016/j.biortech.2020.122994] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/07/2020] [Accepted: 02/08/2020] [Indexed: 06/10/2023]
Abstract
In this study, three pilot-scale solid-phase denitrification (SPD) systems filled with poly-3-hydroxybutyrate-co-hyroxyvelate (PHBV), PHBV-Rice hulls (PHBV-RH) and PHBV-Sawdust (PHBV-S) were operated to treat effluent of waste water treatment pangts (WWTPs). The fast start-up and intensified nitrogen removal performance were obtained in PHBV-RH and PHBV-S systems. Besides, the optimal total nitrogen (TN) removal efficiency was obtained in PHBV-S system (91.65 ± 4.12%) with less ammonia accumulation and dissolved organic carbon (DOC) release. The significant enrichment of amx 16S rRNA and nirS genes in PHBV-RH and PHBV-S systems indicated the possible coexistence of anammox and denitrification. Miseq sequencing analysis exhibited more complex community diversity, more abundant denitrifying and fermenting bacteria in PHBV-RH and PHBV-S systems. The co-existence of denitrification and anammox might contribute to better control of nitrogen and dissolved organic carbon in PHBV-S system. The outcomes provide an economical and eco-friendly alternative to improve nitrogen removal of WWTPs effluent.
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Affiliation(s)
- Zhongchen Yang
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Haimeng Sun
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Qi Zhou
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Liu Zhao
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Weizhong Wu
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China.
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18
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Yang Z, Sun H, Wu W. Intensified simultaneous nitrification and denitrification performance in integrated packed bed bioreactors using PHBV with different dosing methods. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:21560-21569. [PMID: 32279252 DOI: 10.1007/s11356-020-08290-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
To explore an effective approach of simultaneous nitrification and denitrification in wastewater with low C/N ratios, integrated packed bed bioreactors based on poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) with different dosing methods were designed. The removal efficiency of NH4+-N in bioreactor with aeration was 88.62%, and higher NO3--N removal efficiency was observed in bioreactor filled with grainy PHBV (95.21%) than bioreactor filled with strip PHBV (93.34%). Microbial study indicated that microbes harboring amoA and nirS genes preferred to attach on the surface of ceramsite, and significant differences in microbial community compositions at phylum and genus levels were observed. To summarize, it is feasible to utilize grainy PHBV for simultaneous and efficient removal of NH4+-N and NO3--N from wastewater with low C/N ratios.
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Affiliation(s)
- Zhongchen Yang
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, People's Republic of China
| | - Haimeng Sun
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, People's Republic of China
| | - Weizhong Wu
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, People's Republic of China.
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19
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16S rRNA Gene Amplicon Sequencing of Microbiota in Polybutylene Succinate Adipate-Packed Denitrification Reactors Used for Water Treatment of Land-Based Recirculating Aquaculture Systems. Microbiol Resour Announc 2019; 8:8/47/e01295-19. [PMID: 31753952 PMCID: PMC6872894 DOI: 10.1128/mra.01295-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Information on the microbiota in polybutylene succinate adipate (PBSA)-packed denitrification reactors is limited. Here, we provide 439,817 high-quality reads of the 16S rRNA gene sequences of microbiota in PBSA-packed denitrification reactors used for land-based recirculating aquaculture. The predominant microorganisms belonged to the following families: Nocardiaceae, Chitinophagaceae, Xanthobacteraceae, Burkholderiaceae, Rhodocyclaceae, Pseudomonadaceae, Rhodanobacteraceae, and Xanthomonadaceae. Information on the microbiota in polybutylene succinate adipate (PBSA)-packed denitrification reactors is limited. Here, we provide 439,817 high-quality reads of the 16S rRNA gene sequences of microbiota in PBSA-packed denitrification reactors used for land-based recirculating aquaculture. The predominant microorganisms belonged to the following families: Nocardiaceae, Chitinophagaceae, Xanthobacteraceae, Burkholderiaceae, Rhodocyclaceae, Pseudomonadaceae, Rhodanobacteraceae, and Xanthomonadaceae.
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20
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Zhang Q, Chen X, Wu H, Luo W, Liu X, Feng L, Zhao T. Comparison of Clay Ceramsite and Biodegradable Polymers as Carriers in Pack-bed Biofilm Reactor for Nitrate Removal. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16214184. [PMID: 31671860 PMCID: PMC6862475 DOI: 10.3390/ijerph16214184] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 10/22/2019] [Accepted: 10/22/2019] [Indexed: 11/16/2022]
Abstract
In recent years, there is a trend of low C/N ratio in municipal domestic wastewater, which results in serious problems for nitrogen removal from wastewater. The addition of an external soluble carbon source has been the usual procedure to achieve denitrification. However, the disadvantage of this treatment process is the need of a closed, rather sophisticated and costly process control as well as the risk of overdosing. Solid-phase denitrification using biodegradable polymers as biofilm carrier and carbon source was considered as an attractive alternative for biological denitrification. The start-up time of the novel process using PCL (polycaprolactone) as biofilm carrier and carbon source was comparable with that of conventional process using ceramsite as biofilm carrier and acetate as carbon source. Further, the solid-phase denitrification process showed higher nitrogen removal efficiency under shorter hydraulic retention time (HRT) and low carbon to nitrogen (C/N) ratio since the biofilm was firmly attached to the clear pores on the surface of PCL carriers and in this process bacteria that could degrade PCL carriers to obtain electron donor for denitrification was found. In addition, solid-phase denitrification process had a stronger resistance of shock loading than that in conventional process. This study revealed, for the first time, that the physical properties of the biodegradable polymer played a vital role in denitrification, and the different microbial compositions of the two processes was the main reason for the different denitrification performances under low C/N ratio.
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Affiliation(s)
- Qian Zhang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
| | - Xue Chen
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
| | - Heng Wu
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
| | - Wandong Luo
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
| | - Xiangyang Liu
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
| | - Li Feng
- Chongqing Academy of Environmental Science, Chongqing 401147, China.
| | - Tiantao Zhao
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China.
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21
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Li L, Yan G, Wang H, Chu Z, Li Z, Ling Y, Wu T. Denitrification and microbial community in MBBR using A. donax as carbon source and biofilm carriers for reverse osmosis concentrate treatment. J Environ Sci (China) 2019; 84:133-143. [PMID: 31284905 DOI: 10.1016/j.jes.2019.04.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 04/30/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
In this study, raw Arundo donax (A. donax) pieces were applied as carbon source and biofilm carriers for denitrification in a lab-scale moving bed biofilm reactor (MBBR) for the treatment of reverse osmosis concentrate gathered from local wastewater reuse plant. At stable phase (about 60 days), efficient denitrification performance was obtained with 73.2% ± 19.5% NO3--N average removal and 8.10 ± 3.45 g N/(m3·day) NO3--N average volumetric removal rate. Mass balance analysis showed that 4.84 g A. donax was required to remove 1 g TN. Quantitative real-time PCR analysis results showed that the copy numbers of 16S r-RNA, narG, nirS, nosZ and anammox gene of carrier biofilm and suspended activated sludge in the declination phase (BF2 and AS2) were lower than those of samples in the stable phase (BF1 and AS1), and relatively higher copy numbers of nirS and nirK genes with lower abundance of narG and nosZ genes were observed. High-throughput sequencing analysis was conducted for BF2 and AS2, and similar dominant phyla and classes with different abundance were obtained. The class Gammaproteobacteria affiliated with the phylum Proteobacteria was the most dominant microbial community in both BF2 (52.6%) and AS2 (41.7%). The PICRUSt prediction results indicated that 33 predictive specific genes were related to denitrification process, and the relative abundance of 18 predictive specific genes in BF2 were higher than those in AS2.
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Affiliation(s)
- Li Li
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Engineering Center for Environmental Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Guokai Yan
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Engineering Center for Environmental Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Haiyan Wang
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Engineering Center for Environmental Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Zhaosheng Chu
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Zewen Li
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Engineering Center for Environmental Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yu Ling
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Engineering Center for Environmental Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Tong Wu
- State Key Laboratory of Environmental Criteria And Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Engineering Center for Environmental Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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22
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Li C, Li J, Liu G, Deng Y, Zhu S, Ye Z, Shao Y, Liu D. Performance and microbial community analysis of Combined Denitrification and Biofloc Technology (CDBFT) system treating nitrogen-rich aquaculture wastewater. BIORESOURCE TECHNOLOGY 2019; 288:121582. [PMID: 31176936 DOI: 10.1016/j.biortech.2019.121582] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
This study proposed two novel Combined Denitrification and Biofloc Technology (CDBFT) systems (one under blue LED light (L1) and the other without light (C1), each containing a denitrification (DE) reactor and a biofloc-based reactor) for the enhanced total nitrogen (TN) removal. Long-term operation (110 days) suggested that simultaneous nitrification and denitrification was achieved in both C1 and L1. Significantly higher total nitrogen removal efficiency (TNRE) was observed in L1-CDBFT (92.2%) than C1-CDBFT (87.5%, P < 0.05; after day 14). Further 24-hour nitrogen transformation test showed the boosted nitrate removal of L1-BFT than C1-BFT. High-throughput sequencing analysis revealed that phyla Rotifera and Nematoda which were indispensable for aquatic animal larviculture, were only found in L1-BFT. Nevertheless, CDBFT effluent from both systems was suitable for tilapia culture based on water quality, biofloc characteristics and tilapia survival rates. Overall, this study highlights the significance of developing CDBFT for TN removal especially under lights.
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Affiliation(s)
- Changwei Li
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Jiawei Li
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Gang Liu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yale Deng
- Aquaculture and Fisheries Group, Department of Animal Sciences, Wageningen University, 6708 WD Wageningen, The Netherlands
| | - Songming Zhu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Zhangying Ye
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yufang Shao
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Dezhao Liu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
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Zhao Y, Liu D, Huang W, Yang Y, Ji M, Nghiem LD, Trinh QT, Tran NH. Insights into biofilm carriers for biological wastewater treatment processes: Current state-of-the-art, challenges, and opportunities. BIORESOURCE TECHNOLOGY 2019; 288:121619. [PMID: 31202712 DOI: 10.1016/j.biortech.2019.121619] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/03/2019] [Accepted: 06/05/2019] [Indexed: 06/09/2023]
Abstract
Biofilm carriers play an important role in attached growth systems for wastewater treatment processes. This study systematically summarizes the traditional and novel biofilm carriers utilized in biofilm-based wastewater treatment technology. The advantages and disadvantages of traditional biofilm carriers are evaluated and discussed in light of basic property, biocompatibility and applicability. The characteristics, applications performance, and mechanism of novel carriers (including slow-release carriers, hydrophilic/electrophilic modified carriers, magnetic carriers and redox mediator carriers) in wastewater biological treatment were deeply analyzed. Slow release biofilm carriers are used to provide a solid substrate and electron donor for the growth of microorganisms and denitrification for anoxic and/or anaerobic bioreactors. Carriers with hydrophilic/electrophilic modified surface are applied for promoting biofilm formation. Magnetic materials-based carriers are employed to shorten the start-up time of bioreactor. Biofilm carriers acting as redox mediators are used to accelerate biotransformation of recalcitrant pollutants in industrial wastewater.
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Affiliation(s)
- Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Duo Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Wenli Huang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ying Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Long Duc Nghiem
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Quang Thang Trinh
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam
| | - Ngoc Han Tran
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; NUS Environmental Research Institute, National University of Singapore, 1-Create Way, #15-02 Create Tower, Singapore 138602, Singapore.
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