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Liang Y, Chen Y, Chen C, Zhou X, Jia W, Wu Y, Wu Q, Guo L, Wang H, Guo WQ. Sequential bio-treatment of ammonia-rich wastewater from Chinese medicine residue utilization: Regulation of dissolved oxygen. BIORESOURCE TECHNOLOGY 2024; 406:131041. [PMID: 38925404 DOI: 10.1016/j.biortech.2024.131041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/15/2024] [Accepted: 06/24/2024] [Indexed: 06/28/2024]
Abstract
To effectively treat actual ammonia-rich Chinese medicine residue (CMR) resource utilization wastewater, we optimized an anaerobic-microaerobic two-stage expanded granular sludge bed (EGSB) and moving bed sequencing batch reactor (MBSBR) combined process. By controlling dissolved oxygen (DO) levels, impressive removal efficiencies were achieved. Microaeration, contrasting with anaerobic conditions, bolstered dehydrogenase activity, enhanced electron transfer, and enriched the functional microorganism community. The increased relative abundance of Synergistetes and Proteobacteria facilitated hydrolytic acidification and fostered nitrogen and phosphorus removal. Furthermore, we examined the impact of DO concentration in MBSBR on pollutant removal and microbial metabolic activity, pinpointing 2.5 mg/L as the optimal DO concentration for superior removal performance and energy conservation.
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Affiliation(s)
- Yongqi Liang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yihong Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chuchu Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xianjiao Zhou
- Heilongjiang Province Daqing Ecological and Environment Monitoring Center, Daqing 163000, China
| | - Wenrui Jia
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yaohua Wu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qinglian Wu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Liang Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Huazhe Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Wan-Qian Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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2
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Lin Y, Wang Y, Wang W, Hao T, Su K. Mechanistic study on the ferric chloride-based rapid cultivation and enhancement of aerobic granular sludge. ENVIRONMENTAL TECHNOLOGY 2023; 44:3281-3293. [PMID: 35318893 DOI: 10.1080/09593330.2022.2057235] [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: 10/17/2021] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Aerobic granular sludge (AGS) can achieve simultaneous carbon, nitrogen and phosphorus removal owing to its three-dimensional oxygen gradient structure. However, long start-up period and poor operational stability restrict its application and promotion. A novel rapid granulation strategy, viz., the short-term (7 days) addition of ferric chloride at the commissioning stage, was developed and verified in this study. The granulation period was shortened by 9 days, and the formed granules were compact and dense with an Fe3+ concentration of 250 mg L-1. The addition of flocculant not only maintained a high sludge concentration during the initial stages of granulation (5.3 g L-1), but also stimulated the secretion of TB-EPS and increased protein and polysaccharide contents, thereby expediting granule formation. Additionally, ferric chloride induced a diverse microbial community in granules, resulting in the emergence of new genera, such as Thaurea, Brevundimonas and Kinneretia, which improved pollutant removal performance and flocculent aggregation. The removal efficiencies of COD, PO43--P, and NH4+-N stabilized at 94.2, 62.4, and 71.3%, respectively. Therefore, it has been demonstrated that short-term ferric chloride dosing has a synergistic effect on aerobic granulation.
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Affiliation(s)
- Yuxin Lin
- Department of Civil Engineering, Hefei University of Technology, Hefei, People's Republic of China
- Harbour and Waterway Development Center of Department of Transport of Jiangsu Province, Nanjing, People's Republic of China
| | - Yuyin Wang
- Department of Resources and Environmental Engineering, Hefei University of Technology, Hefei, People's Republic of China
- Civil Engineering, College of Science and Engineering, National University of Ireland, Galway, Ireland
| | - Wei Wang
- Department of Civil Engineering, Hefei University of Technology, Hefei, People's Republic of China
| | - Tianwei Hao
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, People's Republic of China
| | - Kuizu Su
- Department of Civil Engineering, Hefei University of Technology, Hefei, People's Republic of China
- Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei, People's Republic of China
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3
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Li J, Feng Y, Qiu Y, Chen D, Liang D, Zhou J, Liu G. Recovery of electron and carbon source from agricultural waste corncob by microbial electrochemical system to enhance wastewater denitrification. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:162926. [PMID: 36933715 DOI: 10.1016/j.scitotenv.2023.162926] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/28/2023] [Accepted: 03/13/2023] [Indexed: 05/13/2023]
Abstract
The denitrification process in wastewater treatment plants (WWTPs) is limited by insufficient carbon sources. Agricultural waste corncob was investigated for its feasibility as a low-cost carbon source for efficient denitrification. The results showed that the corncob as the carbon source exhibited a similar denitrification rate (19.01 ± 0.03 gNO3--N/m3d) to that of the traditional carbon source sodium acetate (19.13 ± 0.37 gNO3--N/m3d). When filling corncob into a microbial electrochemical system (MES) three-dimensional anode, the release of corncob carbon sources was well controlled with an improved denitrification rate (20.73 ± 0.20 gNO3--N/m3d). Carbon source and electron recovered from corncob led to autotrophic denitrification and heterotrophic denitrification occurred in the MES cathode, which synergistically improved the denitrification performance of the system. The proposed strategy for enhanced nitrogen removal by autotrophic coupled with heterotrophic denitrification using agricultural waste corncob as the sole carbon source opened up an attractive route for low-cost and safe deep nitrogen removal in WWTPs and resource utilization for agricultural waste corncob.
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Affiliation(s)
- Jiannan Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China
| | - Ye Qiu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China
| | - Dahong Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China
| | - Dandan Liang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China
| | - Jiajie Zhou
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China
| | - Guohong Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. Harbin 150090, China.
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4
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Ma Q, Pang M, Pang Y, Zhang L, Huang Z. Arrhenius equation construction and nitrate source identification of denitrification at the Lake Taihu sediment - water interface with 15 N isotope. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:65702-65711. [PMID: 37093390 DOI: 10.1007/s11356-023-27122-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 11/17/2022] [Indexed: 05/03/2023]
Abstract
Total nitrogen in Taihu Lake, China has gradually decreased since 2015 while the total phosphorus concentration has exhibited an increasing trend, indicating an asynchronous change. The dominant nitrogen removal process in freshwater ecosystems is denitrification which primarily occurs at the sediment-water interface. In this study, 15 N isotope incubation experiments were attempted to analyze the effect of water temperature on denitrification, to construct the regional denitrification Arrhenius equations considering water temperature, and to identify the nitrate source of denitrification in Lake Taihu sediments. The results indicated that the potential N2 production rates and denitrification rates generally decreased in the west to east direction, which was significantly positively correlated with the nitrate concentration of overlying water by Pearson correlation coefficient analysis (P < 0.05). In addition, when the water temperature was lower than 30 °C, the rates of the potential N2 production and denitrification were higher with an increase in water temperature, but when the water temperature was overhigh, denitrification was inhibited. The ratio of the total denitrification rate of nitrate from the water column in the sediment to the total denitrification rate during the incubation experiment was above 0.5 at each sampling site. This indicated that the denitrification in the Lake Taihu sediment primarily occurred at the expense of nitrate from the water column. The research results of Arrhenius equation construction and nitrate source identification of denitization can be applied to improve the accuracy of water quality model of Taihu Lake, which is of great significance to improve Taihu Lake water quality, and can act as a reference for the water environment treatment of other shallow eutrophic lakes in China and abroad.
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Affiliation(s)
- Qiuxia Ma
- College of Environment, Hohai University, Nanjing, 210098, China
| | - Min Pang
- School of Environmental Science and Technology, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yong Pang
- College of Environment, Hohai University, Nanjing, 210098, China.
| | - Lu Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Zhilin Huang
- College of Environment, Hohai University, Nanjing, 210098, China
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Rogińska J, Philippon T, Hoareau M, P. A. Jorand F, Barrière F, Etienne M. Challenges and Applications of Nitrate-Reducing Microbial Biocathodes. Bioelectrochemistry 2023; 152:108436. [PMID: 37099858 DOI: 10.1016/j.bioelechem.2023.108436] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 03/31/2023] [Accepted: 04/01/2023] [Indexed: 04/08/2023]
Abstract
Bioelectrochemical systems which employ microbes as electrode catalysts to convert chemical energy into electrical energy (or conversely), have emerged in recent years for water sanitation and energy recovery. Microbial biocathodes, and especially those reducing nitrate are gaining more and more attention. The nitrate-reducing biocathodes can efficiently treat nitrate-polluted wastewater. However, they require specific conditions and they have not yet been applied on a large scale. In this review, the current knowledge on nitrate-reducing biocathodes will be summarized. The fundamentals of microbial biocathodes will be discussed, as well as the progress towards applications for nitrate reduction in the context of water treatment. Nitrate-reducing biocathodes will be compared with other nitrate-removal techniques and the challenges and opportunities of this approach will be identified.
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6
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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: 0] [Impact Index Per Article: 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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7
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Sun Q, Zhu G. Deciphering the effects of antibiotics on nitrogen removal and bacterial communities of autotrophic denitrification systems in a three-dimensional biofilm electrode reactor. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 315:120476. [PMID: 36272603 DOI: 10.1016/j.envpol.2022.120476] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/12/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
In this study, three-dimensional biofilm electrode reactors (3D-BERs) were constructed, and the effects of metronidazole (MNZ) on the nitrogen removal performance and bacterial communities of autotrophic denitrification systems were evaluated. The results showed that nitrogen removal decreased slightly as the MNZ concentration increased. Specifically, nitrate-nitrogen removal efficiency decreased from 97.98% to 89.39%, 86.93%, 82.64%, and 82.77% within 12 h after the addition of 1, 3, 5, and 10 mg/L MNZ, respectively. The 3D-BERs showed excellent MNZ degradation ability, especially at a concentration of 10 mg/L. The MNZ removal efficiency could be as high as 94.38% within 6 h, and the average removal rate increased as the MNZ concentration increased. High-throughput sequencing results showed significant changes in the bacterial community under different MNZ concentrations. As the antibiotic concentration increased, the relative abundances of Hydrogenophaga and Silanimonas increased, from only 0.09% and 0.01% without antibiotics to 3.55% and 2.35%, respectively, at an antibiotic concentration of 10 mg/L. Changes in antibiotic concentration altered the abundances of genes involved in nitrogen metabolism. Redundancy analysis showed that MNZ removal efficiency was positively correlated with SBR1031, SC-I-84, Hydrogenophaga, Silanimonas and Denitratesoma, whereas the removal efficiencies of nitrate-nitrogen and total nitrogen were negatively correlated with these genera. The results of this study provide a theoretical basis for studying the toxic effects of antibiotics on the denitrification process and also provide guidance for the control of antibiotics and nitrogen pollution in ecosystems.
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Affiliation(s)
- Qi Sun
- School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China.
| | - Guangcan Zhu
- School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, China; Key Laboratory of Water Pollution Control and Ecological Restoration of Xizang, National Ethnic Affairs Commission, Xizang Minzu University, Xianyang, Shaanxi, 712082, China.
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8
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Chen L, Guo Y, Zhang S. Evaluation of electroactive denitrifiers at different potentials, temperatures and buffers based on microcalorimetry. J Microbiol Methods 2022; 203:106624. [PMID: 36402236 DOI: 10.1016/j.mimet.2022.106624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/12/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Electroactive denitrifiers contribute to the nitrate removal in a bioelectrochemical system, but their metabolism and growth parameters remain vague. In this study, microcalorimetry as a suitable method was used to evaluate the metabolism and growth parameters of electroactive denitrifiers at different cathode potentials, temperatures and buffer solutions. The suitable cathode potential and temperature for electroactive denitrifiers were deemed as -100 mV and 30 °C, respectively. The suitable buffer was found to be phosphate buffer solution but can be replaced by bicarbonate buffer solution. When cultivated with bicarbonate buffer solution at -100 mV and 30 °C, electroactive denitrifiers achieved a specific nitrate removal rate of 2.20 ± 0.08 × 10-10 mg NO3--N·(min·cell)-1 and two growth rate constants (k1 = 0.0051 ± 0.0004 min-1, k2 = 0.0030 ± 0.0004 min-1), with gaseous nitrogen as the end product. The bioelectrochemical denitrification behaved as a two-step process, in which the nitrite reduction to gaseous nitrogen was the rate-limiting step.
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Affiliation(s)
- Long Chen
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Yanli Guo
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Shaohui Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Fuel Cell, Wuhan University of Technology, Wuhan 430070, PR China.
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9
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Xu B, Yang X, Li Y, Yang K, Xiong Y, Yuan N. Pyrite-Based Autotrophic Denitrifying Microorganisms Derived from Paddy Soils: Effects of Organic Co-Substrate Addition. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11763. [PMID: 36142037 PMCID: PMC9517464 DOI: 10.3390/ijerph191811763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/12/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
The presence of organic co-substrate in groundwater and soils is inevitable, and much remains to be learned about the roles of organic co-substrates during pyrite-based denitrification. Herein, an organic co-substrate (acetate) was added to a pyrite-based denitrification system, and the impact of the organic co-substrate on the performance and bacterial community of pyrite-based denitrification processes was evaluated. The addition of organic co-substrate at concentrations higher than 48 mg L-1 inhibited pyrite-based autotrophic denitrification, as no sulfate was produced in treatments with high organic co-substrate addition. In contrast, both competition and promotion effects on pyrite-based autotrophic denitrification occurred with organic co-substrate addition at concentrations of 24 and 48 mg L-1. The subsequent validation experiments suggested that competition had a greater influence than promotion when organic co-substrate was added, even at a low concentration. Thiobacillus, a common chemolithoautotrophic sulfur-oxidizing denitrifier, dominated the system with a relative abundance of 13.04% when pyrite served as the sole electron donor. With the addition of organic co-substrate, Pseudomonas became the dominant genus, with 60.82%, 61.34%, 70.37%, 73.44%, and 35.46% abundance at organic matter concentrations of 24, 48, 120, 240, and 480 mg L-1, respectively. These findings provide an important theoretical basis for the cultivation of pyrite-based autotrophic denitrifying microorganisms for nitrate removal in soils and groundwater.
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Affiliation(s)
- Baokun Xu
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
- Key Laboratory of River Regulation and Flood Control of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China
| | - Xiaoxia Yang
- Chongqing Water Resources Bureau, Chongqing 401147, China
| | - Yalong Li
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
| | - Kejun Yang
- School of Law, Zhongnan University of Economics and Law, Wuhan 430073, China
- Agricultural and Rural Department of Hubei Province, Wuhan 430070, China
| | - Yujiang Xiong
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
| | - Niannian Yuan
- Agricultural Water Conservancy Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
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10
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Mao W, Yang R, Shi H, Feng H, Chen S, Wang X. Identification of key water parameters and microbiological compositions triggering intensive N 2O emissions during landfill leachate treatment process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155135. [PMID: 35405234 DOI: 10.1016/j.scitotenv.2022.155135] [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: 12/15/2021] [Revised: 03/16/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Landfill leachate treatment processes tend to emit more N2O compared to domestic wastewater treatment. This discrepancy may be ascribed to leachate water characteristics such as high refractory COD, ammonium (NH4+) content, and salinity. In this work, the leachate influent was varied to examine the N2O emission scenarios. NH4+-N, COD, and Cl- concentrations ranged between 1000-2500, 1000-10,000, and 500-3000 mg L-1, respectively. Simultaneously, we attempted to combine statistical analysis with high-throughput sequencing to understand the microbial mechanism with regards to N2O emission. Results show that the strong N2O emissions occur in the nitrifying tank due to the intensive aeration. The system receiving the lowest COD shows the maximum N2O emission factor of 42.7% of the removed nitrogen. Both redundancy analysis and a structural equation model verify that insufficient degradable organics are the key water parameter triggering intensive N2O emission within the designed influent limits. Furthermore, two essential but non-abundant functional bacteria, Flavobacterium (acting as a denitrifier) and Nitrosomonas (acting as a nitrifier), are identified as the core functional species that dramatically influence N2O emissions. An increase in influent COD promotes the proliferation of Flavobacterium and inhibits Nitrosomonas, which in turn reduce N2O release. Meanwhile, two keystone species of Castellaniella and Saprospiraceae unclassified are recognized. They may supply a suitable niche and integrity of the microbial community for N-cycle functional bacteria. These findings reveal the essential role of non-abundant species in microbial community, and expand the current understanding of microbial interactions underlying N2O dynamics in leachate treatment systems.
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Affiliation(s)
- Wenlong Mao
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Ruili Yang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Huiqun Shi
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Hualiang Feng
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| | - Shaohua Chen
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| | - Xiaojun Wang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
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11
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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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12
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Lin Z, Cheng S, Li H, Jin B, He X. Highly selective and sensitive nitrite biocathode biosensor prepared by polarity inversion method coupled with selective removal of interfering electroactive bacteria. Biosens Bioelectron 2022; 214:114507. [DOI: 10.1016/j.bios.2022.114507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 11/02/2022]
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13
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Xiao Z, Jiang Q, Li Y, Zhou J, Chen D, Xia T. Enhanced microbial nitrate reduction using natural manganese oxide ore as an electron donor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 306:114497. [PMID: 35038669 DOI: 10.1016/j.jenvman.2022.114497] [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: 10/13/2021] [Revised: 01/04/2022] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Nitrate contamination of groundwater is a global problem. Enhanced biological nitrate reduction by liquid organics combined with low-cost natural materials (as electron donors) can cost-effectively remove nitrate from groundwater. Dissolved Mn(II) as an electron donor has been thoroughly investigated to support microbial nitrate reduction. However, most Mn in soil and sediments is in solid form, and the ability of solid-phase natural manganese oxide ore (NMO) as electron donor and for supporting microbial nitrate reduction is unknown. Therefore, a microcosm experiment was conducted to bridge this gap in knowledge. The results demonstrated that microbial nitrate reduction (mainly converted to nitrite) was enhanced by NMO (rich in cryptomelane). The electrochemical and X-ray photoelectron spectroscopy analyses suggested that NMO may be oxidized by microbial metabolism. Illumina Miseq sequencing results indicated that Acidovorax spp. played a crucial role in NMO-supported nitrate reduction. Further Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) analyses indicated that bacterial extracellular electron transfer may be one of the mechanisms for the microbial NMO oxidation. The results of our study highlight the potential importance of NMO in nitrate reduction in the natural environment and may pave the way for NMO-assisted technology for nitrate removal from groundwater with less usage of organic electron donors.
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Affiliation(s)
- Zhixing Xiao
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Qitao Jiang
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Yi Li
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Jun Zhou
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Dan Chen
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China.
| | - Ting Xia
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
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14
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Zhang L, Jiang M, Zhou S. Conversion of nitrogen and carbon in enriched paddy soil by denitrification coupled with anammox in a bioelectrochemical system. J Environ Sci (China) 2022; 111:197-207. [PMID: 34949349 DOI: 10.1016/j.jes.2021.03.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 03/15/2021] [Accepted: 03/15/2021] [Indexed: 06/14/2023]
Abstract
The aim of this study is to investigate conversion of nitrogen and COD in enriched paddy soil by nitrification coupled with anammox process in a dual chamber bioelectrochemical system. The paddy soil was enriched for denitrification coupled with anammox by microbial consortia and was acclimatized in the cathodic chamber of microbial fuel cells (MFCs). The bioelectrochemical systems were treated with different ammonium concentrations in the cathodic chamber: the MFC with low concentration ammonium (LA-MFC, 50 mg/L ammonium), the MFC with medium concentration ammonium (MA-MFC, 500 mg/L ammonium), and MFC with high concentration ammonium (HA-MFC, 1000 mg/L ammonium), and the initial COD in the anodic chamber was 1200 mg/L. The CK treatments were conducted with 1000 mg/L ammonium under the same conditions, except without inoculum in the cathode chamber. The consumption rate of ammonium in the cathodic chambers of CK, LA-MFC, MA-MFC, and HA-MFC were 9%, 64%, 84%, and 84%, respectively. The degradation rate for COD achieved in the anode chambers of CK, LA-MFC, MA-MFC, and HA-MFC were 70%, 86%, 93%, and 93%, respectively. The analysis of the microbial community of three treated MFCs in the cathode chamber indicated that the nitrification-denitrification process occurs in the cathode chamber. The dominant species for nitrification was Nitrospira, and the dominant species for denitrification were Denitratisoma, Dechloromonas, and Candidatus_Competibacter. Moreover, anammox process also observed in the cathode chamber. The functional genes nirS/K, hzsB, and 16S rDNA were assessed by qPCR analysis, and the results confirmed the presence of denitrification-coupled anammox in the cathodic chamber.
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Affiliation(s)
- Luan Zhang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Minghe Jiang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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15
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Lin Z, Cheng S, Yu Z, Yang J, Huang H, Sun Y. Enhancing bio-cathodic nitrate removal through anode-cathode polarity inversion together with regulating the anode electroactivity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 764:142809. [PMID: 33097251 DOI: 10.1016/j.scitotenv.2020.142809] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 09/29/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Bio-cathodic nitrate removal uses autotrophic nitrate-reducing bacteria as catalysts to realize the nitrate removal process and has been considered as a cost-effective way to remove nitrate contamination. However, the present bio-cathodic nitrate removal process has problems with long start-up time and low performance, which are urgently required to improve for its application. In this study, we investigated an anode-cathode polarity inversion method for rapidly cultivating high-performance nitrate-reducing bio-cathode by regulating bio-anodic bio-oxidation electroactivities under different external resistances and explored at the first time the correlation between the oxidation performance and the reduction performance of one mixed-bacteria bioelectrode. A high bio-electrochemical nitrate removal rate of 2.74 ± 0.03 gNO3--N m-2 d-1 was obtained at the bioelectrode with high bio-anodic bio-oxidation electroactivity, which was 4.0 times that of 0.69 ± 0.03 gNO3--N m-2 d-1 at the bioelectrode with low bio-oxidation electroactivity, and which was 1.3-7.9 times that of reported (0.35-2.04 gNO3--N m-2 d-1). 16S rRNA gene sequences and bacterial biomass analysis showed higher bio-cathodic nitrate removal came from higher bacterial biomass of electrogenic bacteria and nitrate-reducing bacteria. A good linear correlation between the bio-cathodic nitrate removal performance and the reversed bio-anodic bio-oxidation electroactivity was presented and likely implied that electrogenic biofilm had either action as autotrophic nitrate reduction or promotion to the development of autotrophic nitrate removal system. This study provided a novel strategy not only to rapidly cultivate high-performance bio-cathode but also to possibly develop the bio-cathode with specific functions for substance synthesis and pollutant detection.
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Affiliation(s)
- Zhufan Lin
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Shaoan Cheng
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China.
| | - Zhen Yu
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Jiawei Yang
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Haobin Huang
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Yi Sun
- State Key Laboratory of Clean Energy, Department of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China
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16
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Effect of Cathode Material and Its Size on the Abundance of Nitrogen Removal Functional Genes in Microcosms of Integrated Bioelectrochemical-Wetland Systems. SOIL SYSTEMS 2020. [DOI: 10.3390/soilsystems4030047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Constructed wetland-microbial electrochemical snorkel (CW-MES) systems, which are short-circuited microbial fuel cells (MFC), have emerged as a novel tool for wastewater management, although the system mechanisms are insufficiently studied in process-based or environmental contexts. Based on quantitative polymerase chain reaction assays, we assessed the prevalence of different nitrogen removal processes for treating nitrate-rich waters with varying cathode materials (stainless steel, graphite felt, and copper) and sizes in the CW-MES systems and correlated them to the changes of N2O emissions. The nitrate and nitrite removal efficiencies were in range of 40% to 75% and over 98%, respectively. In response to the electrochemical manipulation, the abundances of most of the nitrogen-transforming microbial groups decreased in general. Graphite felt cathodes supported nitrifiers, but nirK-type denitrifiers were inhibited. Anaerobic ammonium oxidation (ANAMMOX) bacteria were less abundant in the electrochemically manipulated treatments compared to the controls. ANAMMOX and denitrification are the main nitrogen reducers in CW-MES systems. The treatments with 1:1 graphite felt, copper, plastic, and stainless-steel cathodes showed higher N2O emissions. nirS- and nosZI-type denitrifiers are mainly responsible for producing and reducing N2O emissions, respectively. Hence, electrochemical manipulation supported dissimilatory nitrate reduction to ammonium (DNRA) microbes may play a crucial role in producing N2O in CW-MES systems.
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17
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Guo Y, Wang J, Shinde S, Wang X, Li Y, Dai Y, Ren J, Zhang P, Liu X. Simultaneous wastewater treatment and energy harvesting in microbial fuel cells: an update on the biocatalysts. RSC Adv 2020; 10:25874-25887. [PMID: 35518611 PMCID: PMC9055303 DOI: 10.1039/d0ra05234e] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 07/03/2020] [Indexed: 01/17/2023] Open
Abstract
The development of microbial fuel cell (MFC) makes it possible to generate clean electricity as well as remove pollutants from wastewater. Extensive studies on MFC have focused on structural design and performance optimization, and tremendous advances have been made in these fields. However, there is still a lack of systematic analysis on biocatalysts used in MFCs, especially when it comes to pollutant removal and simultaneous energy recovery. In this review, we aim to provide an update on MFC-based wastewater treatment and energy harvesting research, and analyze various biocatalysts used in MFCs and their underlying mechanisms in pollutant removal as well as energy recovery from wastewater. Lastly, we highlight key future research areas that will further our understanding in improving MFC performance for simultaneous wastewater treatment and sustainable energy harvesting.
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Affiliation(s)
- Yajing Guo
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Jiao Wang
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Shrameeta Shinde
- Department of Microbiology, Miami University Oxford OH 45056 USA
| | - Xin Wang
- Department of Microbiology, Miami University Oxford OH 45056 USA
| | - Yang Li
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Yexin Dai
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Jun Ren
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Pingping Zhang
- College of Food Science and Engineering, Tianjin Agricultural University Tianjin 300384 PR China
| | - Xianhua Liu
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
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18
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Sui M, Dong Y, Wang P, Zhang Y, Tan X, Li Y. Highly efficient nitrate reduction driven by an electrocoagulation system: An electrochemical and molecular mechanism. Bioelectrochemistry 2020; 133:107454. [DOI: 10.1016/j.bioelechem.2019.107454] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 12/27/2019] [Accepted: 12/28/2019] [Indexed: 11/28/2022]
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19
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Zhai S, Ji M, Zhao Y, Su X. Shift of bacterial community and denitrification functional genes in biofilm electrode reactor in response to high salinity. ENVIRONMENTAL RESEARCH 2020; 184:109007. [PMID: 32086003 DOI: 10.1016/j.envres.2019.109007] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 05/14/2023]
Abstract
High salinity suppresses denitrification by inhibiting microorganism activities. The shift of microbial community and denitrification functional genes under salinity gradient was systematically investigated in a biofilm electrode reactor (BER) and biofilm reactor (BR) systems. Denitrification efficiency of both BER and BR was not significantly inhibited during the period of low salinity (0-2.0%). As the salinity increased to 2.5%, BER could overcome the impact of high salinity and maintained a relatively stable denitrification performance, and the effluent NO3--N was lower than 1.5 mg/L. High salinity (>2.5%) impoverished microbial diversity and altered the microbial community in both BER and BR. However, two genera Methylophaga and Methyloexplanations were enriched in BER due to electrochemical stimulation, which can tolerate high salinity (>3.0%). The relative abundance of Methylophaga in BER was almost 10 times as much as in BR. Paracoccus is a hydrogen autotrophic denitrifier, which was obviously inhibited with 1.0% NaCl. The hetertrophic denitrifiers were primarily responsible for the nitrate removal in the BER compared to the autotrophic denitrifiers. The abundance and proportion of denitrifying functional genes confirmed that main denitrifiers shift to salt-tolerant species (nirK-type denitrifiers) to reduce the toxic effects. The napA (2.2 × 108 to 6.5 × 108 copies/g biofilm) and nosZ (2.2 × 107 to 4.4 × 107 copies/g biofilm) genes were more abundant in BER compared to BR's, which was attributed to the enrichment of Methylophaga alcalica and Methyloversatilis universalis FAM5 in the BER. The results proved that BER had greater denitrification potential under high salinity (>2.0%) stress at the molecular level.
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Affiliation(s)
- Siyuan Zhai
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Tianjin Engineering Center of Urban River Eco-Purification Technology, Tianjin, 300350, China
| | - Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Tianjin Engineering Center of Urban River Eco-Purification Technology, Tianjin, 300350, China.
| | - Xiao Su
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Tianjin Water Supply Group Co. Ltd, Tianjin, 300121, China
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20
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Zhang X, Zhang H, Wang C, Chen Q, Zhao Y, Zhou Q, Wu Z. Isolation of two iron-reducing facultative anaerobic electricigens and probing the application performance in eutrophication water. ANN MICROBIOL 2020. [DOI: 10.1186/s13213-020-01568-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Purpose
Sediment microbial fuel cell (SMFC) is a promising bioremediation technology in which microbes play an important role. Electricigens as the bio-catalysts have effect on pollution control and electricity generation. It is of great significance to screen the microorganisms with the ability of generating electricity.
Methods
The SMFC anode biofilm was used as microbiological source to study the feasibility of electricigens with iron-reducing property for eutrophication water treatment. Preliminarily, we isolated 20 facultative anaerobic pure bacteria and evaluated their cyclic voltammogram (CV) through the three-electrode system and electrochemical workstation. The power generation performance of strains was verified by air-cathode microbial fuel cells (AC-MFCs) under different single carbon sources.
Result
According to its morphological, physiological, and biochemical characteristics, along with phylogenetic analysis, the two strains (SMFC-7 and SMFC-17) with electrical characteristics were identified as Bacillus cereus. Compared with SMFC-7, SMFC-17 exhibited efficient NH4+-N and NO3−-N removal and PO43−-P accumulation from eutrophic solution with a removal rate of 79.91 ± 6.34% and 81.26 ± 1.11% and accumulation rate of 57.68 ± 4.36%, respectively.
Conclusion
The isolated bacteria SMFC-17 showed a good performance in eutrophic solution, and it might be a useful biocatalyst to enable the industrialized application of SMFC in eutrophic water treatment.
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21
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Brandon TA, Stamps BW, Cummings A, Zhang T, Wang X, Jiang D. Poised potential is not an effective strategy to enhance bio-electrochemical denitrification under cyclic substrate limitations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 713:136698. [PMID: 32019036 DOI: 10.1016/j.scitotenv.2020.136698] [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: 11/19/2019] [Revised: 01/12/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
Bio-electrochemical denitrification (BED) is a promising organic carbon-free nitrate remediation technology. However, the relationship between engineering conditions, biofilm community composition, and resultant functions in BED remains under-explored. This study used deep sequencing and variation partitioning analysis to investigate the compositional shifts in biofilm communities under varied poised potentials in the batch mode, and correlated these shifts to reactor-level functional differences. Interestingly, the results suggest that the proliferation of a key species, Thiobacillus denitrificans, and community diversity (the Shannon index), were almost equally important in explaining the reactor-to-reactor functional variability (e.g. variability in denitrification rates was 51% and 38% attributable to key species and community diversity respectively, with a 30% overlap), but neither was heavily impacted by the poised potential. The findings suggest that while enriching the key species may be critical in improving the functional efficiency of BED, poised potentials may not be an effective strategy to achieve the desired level of enrichment in substrate-limited real-world conditions.
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Affiliation(s)
- Taymee A Brandon
- Department of Environmental Engineering, Montana Technological University, Butte, MT 59701, USA
| | - Blake W Stamps
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, USA
| | - Ashton Cummings
- Department of Environmental Engineering, Montana Technological University, Butte, MT 59701, USA
| | - Tianyu Zhang
- Department of Mathematical Sciences, Montana State University, Bozeman, MT 59717, USA
| | - Xin Wang
- Department of Civil and Environmental Engineering, Nankai University, Tianjin 300071, China
| | - Daqian Jiang
- Department of Environmental Engineering, Montana Technological University, Butte, MT 59701, USA.
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22
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Al-Mamun A, Jafary T, Baawain MS, Rahman S, Choudhury MR, Tabatabaei M, Lam SS. Energy recovery and carbon/nitrogen removal from sewage and contaminated groundwater in a coupled hydrolytic-acidogenic sequencing batch reactor and denitrifying biocathode microbial fuel cell. ENVIRONMENTAL RESEARCH 2020; 183:109273. [PMID: 32105886 DOI: 10.1016/j.envres.2020.109273] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 02/09/2020] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
Developing cost-effective technology for treatment of sewage and nitrogen-containing groundwater is one of the crucial challenges of global water industries. Microbial fuel cells (MFCs) oxidize organics from sewage by exoelectrogens on anode to produce electricity while denitrifiers on cathode utilize the generated electricity to reduce nitrogen from contaminated groundwater. As the exoelectrogens are incapable of oxidizing insoluble, polymeric, and complex organics, a novel integration of an anaerobic sequencing batch reactor (ASBR) prior to the MFC simultaneously achieve hydrolytic-acidogenic conversion of complex organics, boost power recovery, and remove Carbon/Nitrogen (C/N) from the sewage and groundwater. The results obtained revealed increases in the fractions of soluble organics and volatile fatty acids in pretreated sewage by 52 ± 19% and 120 ± 40%, respectively. The optimum power and current generation with the pretreated sewage were 7.1 W m-3 and 45.88 A m-3, respectively, corresponding to 8% and 10% improvements compared to untreated sewage. Moreover, the integration of the ASBR with the biocathode MFC led to 217% higher carbon and 136% higher nitrogen removal efficiencies compared to the similar system without ASBR. The outcomes of the present study represent the promising prospects of using ASBR pretreatment and successive utilization of solubilized organics in denitrifying biocathode MFCs for simultaneous energy recovery and C/N removal from both sewage and nitrate nitrogen-contaminated groundwater.
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Affiliation(s)
- Abdullah Al-Mamun
- Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Muscat, Oman.
| | - Tahereh Jafary
- Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Muscat, Oman; Process Engineering Department, International Maritime College, Sohar, Oman
| | - Mahad Said Baawain
- Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Muscat, Oman
| | - Sadik Rahman
- Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Muscat, Oman
| | - Mahbuboor Rahman Choudhury
- Department of Civil and Environmental Engineering, Manhattan College, 4513 Manhattan College Parkway, Riverdale, NY, 10471, USA
| | - Meisam Tabatabaei
- Faculty of Plantation and Agrotechnology, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia; Biofuel Research Team (BRTeam), Karaj, Iran; Microbial Biotechnology Department, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Extension, and Education Organization (AREEO), Karaj, Iran; Faculty of Mechanical Engineering, Ho Chi Minh City University of Transport, Ho Chi Minh City, Viet Nam
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries Research (Akuatrop) & Institute of Tropical Biodiversity and Sustainable Development (Bio-D Tropika), Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
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23
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Enhancing Nitrate Removal from Waters with Low Organic Carbon Concentration Using a Bioelectrochemical System—A Pilot-Scale Study. WATER 2020. [DOI: 10.3390/w12020516] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Assessments of groundwater aquifers made around the world show that in many cases, nitrate concentrations exceed the safe drinking water threshold. This study assessed how bioelectrochemical systems could be used to enhance nitrate removal from waters with low organic carbon concentrations. A two-chamber microbial electrosynthesis cell (MES) was constructed and operated for 45 days with inoculum that was taken from a municipal wastewater treatment plant. A study showed that MES can be used to enhance nitrate removal efficiency from 3.66% day−1 in a control reactor to 8.54% day−1 in the MES reactor, if a cathode is able to act as an electron donor for autotrophic denitrifying bacteria or there is reducing oxygen in a cathodic chamber to favor denitrification. In the MES, greenhouse gas emissions were also lower compared to the control. Nitrous oxide average fluxes were −639.59 and −9.15 µg N m−2 h−1 for the MES and control, respectively, and the average carbon dioxide fluxes were −5.28 and 43.80 mg C m−2 h−1, respectively. The current density correlated significantly with the dissolved oxygen concentration, indicating that it is essential to keep the dissolved oxygen concentration in the cathode chamber as low as possible, not only to suppress oxygen’s inhibiting effect on denitrification but also to achieve better power efficiency.
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Abstract
Groundwater is the environmental matrix that is most frequently affected by anthropogenic hexavalent chromium contamination. Due to its carcinogenicity, Cr(VI) has to be removed, using environmental-friendly and economically sustainable remediation technologies. BioElectrochemical Systems (BESs), applied to bioremediation, thereby offering a promising alternative to traditional bioremediation techniques, without affecting the natural groundwater conditions. Some bacterial families are capable of oxidizing and/or reducing a solid electrode obtaining an energetic advantage for their own growth. In the present study, we assessed the possibility of stimulating bioelectrochemical reduction of Cr(VI) in a dual-chamber polarized system using an electrode as the sole energy source. To develop an electroactive microbial community three electrodes were, at first, inserted into the anodic compartment of a dual-chamber microbial fuel cell, and inoculated with sludge from an anaerobic digester. After a period of acclimation, one electrode was transferred into a polarized system and it was fixed at −0.3 V (versus standard hydrogen electrode, SHE), to promote the reduction of 1000 µg Cr(VI) L−1. A second electrode, served for the set-up of an open circuit control, operated in parallel. Cr(VI) dissolved concentration was analysed at the initial, during the experiment and final time by spectrophotometric method. Initial and final microbial characterization of the communities enriched in polarized system and open circuit control was performed by 16S rRNA gene sequencing. The bioelectrode set at −0.3 V showed high Cr(VI) removal efficiency (up to 93%) and about 150 µg L−1 day−1 removal rate. Similar efficiency was observed in the open circuit (OC) even at about half rate. Whereas, purely electrochemical reduction, limited to 35%, due to neutral operating conditions. These results suggest that bioelectrochemical Cr(VI) removal by polarized electrode offers a promising new and sustainable approach to the treatment of groundwater Cr(VI) plumes, deserving further research.
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Qian L, Duan H, Yan J, Tsang YF, Qiao J, Fu X, Wang L. Can multiple harvests of plants improve nitrogen removal from the point-bar soil of lake? JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 249:109371. [PMID: 31404853 DOI: 10.1016/j.jenvman.2019.109371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 07/28/2019] [Accepted: 08/05/2019] [Indexed: 06/10/2023]
Abstract
Point bar areas around lakes can provide ecological service functions. For example, plants growing on point bars absorb and remove nutrients from the soil and water. However, if the point-bar plants are unregulated, in the fall and winter, plant debris will decompose, releasing nutrients that then enter the water body and cause eutrophication. Therefore, any harvesting should be managed. But how to harvest plants and how often to harvest them, and there is little research on these. In this study, the point bar at Qingcaosha Reservoir was used to study the effects of three plant harvesting modes (M1: unharvested; M2: one harvest in the fall; and M3: one harvest in summer and one in the fall) on the removal of nitrogen (N) from point-bar soil. The largest amount of N was removed by the plants when the M3 mode was used (26.93 g/m2). However, the M2 mode removed the most N from the soil during the plant growth season (81.62 g/m2), which implied that the nitrification and denitrification effects of soil microorganisms make the largest contribution to N removal from this point-bar soil. The nitrification and denitrification activity of microorganisms was higher for M2 than for M1 and M3 in the following year. Additionally, summer harvesting (M3) had a negative effect on nitrification efficiency in the current season because anaerobic bacteria in the soil significantly increased and nitrifying bacteria significantly decreased after harvesting. However, after a period of recovery, the number of microbial nitrifiers increased again and nitrification activity rose in the following year. The reduction in oxygen supply after harvesting may be the main reason for low nitrification in the current season, but it was beneficial to nitrification and denitrification in the following year because there was luxuriant plant growth. Therefore, when considering both the current season and the following year, harvesting should not be too frequent and one harvest in the fall (M2) led to the largest removal of N from the soil.
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Affiliation(s)
- Liwei Qian
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, China
| | - Hao Duan
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, China
| | - Jianfang Yan
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, China
| | - Yiu Fai Tsang
- Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong SAR, China
| | - Junlian Qiao
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Xiaohua Fu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, China
| | - Lei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, China.
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26
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Chen Z, Zhang S, Zhong L. Simultaneous sulfide removal, nitrogen removal and electricity generation in a coupled microbial fuel cell system. BIORESOURCE TECHNOLOGY 2019; 291:121888. [PMID: 31374413 DOI: 10.1016/j.biortech.2019.121888] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
A coupled microbial fuel cell (MFC) system, consisting of a nitrifying sulfide removal MFC and a denitrifying sulfide removal MFC, was assembled to simultaneously treat ammonium and sulfide in wastewater. It provided a promising approach to recover electricity from wastewater containing sulfide and ammonium. Considering both substrate removal and electricity generation performance, the desirable feeding S/N molar ratio was deemed as 3 and the optimal temperature was found to be 30 °C. Under this condition, the coupled MFC achieved a sum coulomb production of 554.8 C/d, a total nitrogen removal efficiency of 58.7 ± 1.3% and a sulfur production percent of 27.4 ± 0.4-33.3 ± 0.9%. The introduction of nitrifiers and electroactive oxic microbes from the oxic-cathode chamber into the anoxic-cathode chamber favored nitrogen removal.
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Affiliation(s)
- Zhuang Chen
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Shaohui Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China; Hubei Key Laboratory of Fuel Cell, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Liuxiang Zhong
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
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Rathour R, Patel D, Shaikh S, Desai C. Eco-electrogenic treatment of dyestuff wastewater using constructed wetland-microbial fuel cell system with an evaluation of electrode-enriched microbial community structures. BIORESOURCE TECHNOLOGY 2019; 285:121349. [PMID: 31004945 DOI: 10.1016/j.biortech.2019.121349] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/11/2019] [Accepted: 04/13/2019] [Indexed: 06/09/2023]
Abstract
This work studied eco-electrogenic treatment of real dyestuff wastewater along with characterization of electrode-enriched microbial community structures in Fimbristylis dichotoma planted closed-circuit constructed wetland-microbial fuel cell (CW-MFC) system. The CW-MFC-2 (experimental system) achieved 82.2 ± 1.7% ADMI removal and 70 ± 2% COD reduction; that were found to be 9% and 7.4% higher than the standalone constructed wetland (CW) system (bioremediation control) respectively. Likewise, the CW-MFC-2 system achieved maximum power density of 198.8 mW/m2, which was 85.6 ± 2.47% higher than the CW-MFC-1 system (eco-electricity control). Quantitative reverse transcription PCR (qRT-PCR) assays revealed significant down-regulation of hepatic oxidative stress response biomarker genes in Oreochromis niloticus exposed to CW-MFC-2 system treated dyestuff wastewater as compared with untreated wastewater. The biofilms associated with the anode and cathode of the CW-MFC-2 system exhibited selective enrichment of electrochemically active and dye degrading microbial communities.
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Affiliation(s)
- Rohit Rathour
- P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology CHARUSAT Campus, Changa - 388421, Gujarat, India
| | - Dishant Patel
- P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology CHARUSAT Campus, Changa - 388421, Gujarat, India
| | - Shabnam Shaikh
- P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology CHARUSAT Campus, Changa - 388421, Gujarat, India
| | - Chirayu Desai
- P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology CHARUSAT Campus, Changa - 388421, Gujarat, India.
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Kamaraj SK, Rivera AE, Murugesan S, García-Mena J, Maya O, Frausto-Reyes C, Tapia-Ramírez J, Espino HS, Caballero-Briones F. Electricity generation from Nopal biogas effluent using a surface modified clay cup ( cantarito) microbial fuel cell. Heliyon 2019; 5:e01506. [PMID: 31183413 PMCID: PMC6495065 DOI: 10.1016/j.heliyon.2019.e01506] [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: 11/03/2018] [Revised: 01/21/2019] [Accepted: 04/08/2019] [Indexed: 12/22/2022] Open
Abstract
A modified clay cup (cantarito) microbial fuel cell (C-MFCs) was designed to digest the biomass effluent from a nopal biogas (NBE). To improve the process, commercial acrylic varnish (AV) was applied to the C-MFCs. The experiment was performed as:Both-C-MFCs, painting of AV on both sides of the clay cup; In-C-MFCs, painting of AV on the internal side, and Out-C-MFCs painting of AV on the external side. The order for the maximum volumetric power densities were Both-C-MFCs (1841.99 mW/m3)>Out-C-MFCs (1023.74 mW/m3) >In-C-MFCs (448.90 mW/m3). The control experiment without applied varnish did not show a stable potential, supporting the idea that the acryloyl group in varnish could favor the performance. Finally, a 4-digits clock was powered with two, Both-C-MFCs connected in series; the microbial diversity in this format was explored and a well-defined bacterial community including members of the phyla Actinobacteria, Bacteroidetes, Firmicutes, Proteobacteria, Synergistetes and candidate division TM7 was found.
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Affiliation(s)
- Sathish-Kumar Kamaraj
- Laboratorio de medio ambiente sostenible y Laboratorio de Cultivo de Tejidos Vegetales, Instituto Tecnológico El Llano (ITEL)/ Tecnológico Nacional de México (TecNM), Aguascalientes. Km 18 carr, Aguascalientes-San Luis Potosí, El Llano Ags., C.P. 20330, Mexico
| | - Alejandro Esqueda Rivera
- Universidad Politécnica de Aguascalientes, Ingeniería en Energía, Calle Paseo San Gerardo No. 207, Fracc. San Gerardo, Aguascalientes, Ags., 20342, Mexico
| | - Selvasankar Murugesan
- Departamento de Genética y Biología Molecular, Cinvestav-IPN, México DF, D.F. 07360, Mexico
| | - Jaime García-Mena
- Departamento de Genética y Biología Molecular, Cinvestav-IPN, México DF, D.F. 07360, Mexico
| | - Otoniel Maya
- Departamento de Genética y Biología Molecular, Cinvestav-IPN, México DF, D.F. 07360, Mexico
| | - Claudio Frausto-Reyes
- Centro de Investigaciones en Óptica, A.C., Unidad Aguascalientes, Prol. Constitución 607, Fracc. Reserva Loma Bonita Aguascalientes, 20200, Mexico
| | - José Tapia-Ramírez
- Departamento de Genética y Biología Molecular, Cinvestav-IPN, México DF, D.F. 07360, Mexico
| | - Hector Silos Espino
- Laboratorio de medio ambiente sostenible y Laboratorio de Cultivo de Tejidos Vegetales, Instituto Tecnológico El Llano (ITEL)/ Tecnológico Nacional de México (TecNM), Aguascalientes. Km 18 carr, Aguascalientes-San Luis Potosí, El Llano Ags., C.P. 20330, Mexico
| | - Felipe Caballero-Briones
- Instituto Politécnico Nacional, Materials and Technologies for Energy, Health and Environment (GESMAT), CICATA Altamira, Km 14.5 Carretera Tampico-Puerto Industrial Altamira, 89600, Altamira, Mexico
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Xiao Z, Wang W, Chen D, Yu Y, Huang H. pH control of an upflow pyrite-oxidizing denitrifying bioreactor via electrohydrogenesis. BIORESOURCE TECHNOLOGY 2019; 281:41-47. [PMID: 30785000 DOI: 10.1016/j.biortech.2019.02.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/04/2019] [Accepted: 02/06/2019] [Indexed: 06/09/2023]
Abstract
Maintenance of stable pH during pyrite-oxidizing denitrification process is important. Here, we demonstrated effective pH control (7.80 ± 0.20-8.40 ± 0.30) in an electrochemical-H2 and pyrite-oxidizing denitrifying bioreactor (HPR) through in situ electrohydrogenesis. HPR achieved a higher nitrate removal activity (maximum:19.66 ± 0.63 mg NO3--N/(L·h)) with excellent resistance to high nitrate loading (up to 400 mg/L NO3--N) compared to that of the control groups. Nitrate removal rate of HPR fitted the Michaelis-Menten kinetic model (R2 = 0.98, p < 0.01) well, and the denitrification followed the zero-order rate law. The results of the biofilm community analyses suggested that Thauera was the dominant bacteria in the cathode biofilm of HPR and may prefer hydrogen as an electron donor for autotrophic denitrification, while the relative abundance of Pseudomonas were similar in the cathode biofilm and pyrite biofilm. This study provides a new alternative for effective pH control in denitrifying bioreactors with pyrite as a packing material.
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Affiliation(s)
- Zhixing Xiao
- College of Urban Construction, Nanjing Tech University, Nanjing 211816, China
| | - Weidong Wang
- Oil Production Research Institute, Shengli Oilfield Company, Sinopec, Dongying 257000, China
| | - Dan Chen
- College of Urban Construction, Nanjing Tech University, Nanjing 211816, China.
| | - Yadong Yu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - He Huang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
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30
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Sun J, Xu W, Yuan Y, Lu X, Kjellerup BV, Xu Z, Zhang H, Zhang Y. Bioelectrical power generation coupled with high-strength nitrogen removal using a photo-bioelectrochemical fuel cell under oxytetracycline stress. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Tong S, Liu H, Feng C, Chen N, Zhao Y, Xu B, Zhao J, Zhu M. Stimulation impact of electric currents on heterotrophic denitrifying microbial viability and denitrification performance in high concentration nitrate-contaminated wastewater. J Environ Sci (China) 2019; 77:363-371. [PMID: 30573101 DOI: 10.1016/j.jes.2018.09.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/11/2018] [Accepted: 09/11/2018] [Indexed: 06/09/2023]
Abstract
Electric current stimulation has been shown to have a positive influence on heterotrophic denitrifying microbial viability and has the potential to improve wastewater denitrification performance. This study investigated the effects of varying current densities on microbial activity and NO3- removal efficiency under heterotrophic conditions.NO3- removal rate was highest at an applied current density of 400 mA/m2. However, the optimum removal efficiency of total inorganic nitrogen (TIN; 99%) was achieved when the current density was fixed at 200 mA/m2. Accumulation of NH4+-N and NO2--N byproducts were also minimized at this current density. The activity of heterotrophic denitrifying microorganisms was much higher at both 200 and 400 mA/m2. Moreover, the average adenosine-5'-triphosphate (ATP) content (an indicator of cell metabolism) at a current density of 1600 mA/m2 was lower than that under no current, indicating heterotrophic denitrifying microbial activity can be inhibited at high current densities. Hence, direct electrical stimulation on the activity of heterotrophic denitrifying microorganisms in the developed system should be lower than 1600 mA/m2. This study improves the understanding of electric current influence on heterotrophic denitrifying microorganisms and promotes the intelligent application of direct electrical stimulation on wastewater treatment processes.
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Affiliation(s)
- Shuang Tong
- Beijing Key Laboratory of Meat Processing Technology, China Meat Research Center, Beijing 100068, China; School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Hengyuan Liu
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Chuanping Feng
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Nan Chen
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Yan Zhao
- Beijing Key Laboratory of Meat Processing Technology, China Meat Research Center, Beijing 100068, China
| | - Baocai Xu
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Jiamin Zhao
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Ming Zhu
- Beijing Key Laboratory of Meat Processing Technology, China Meat Research Center, Beijing 100068, China
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32
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Vijay A, Chhabra M, Vincent T. Microbial community modulates electrochemical performance and denitrification rate in a biocathodic autotrophic and heterotrophic denitrifying microbial fuel cell. BIORESOURCE TECHNOLOGY 2019; 272:217-225. [PMID: 30342426 DOI: 10.1016/j.biortech.2018.10.030] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/10/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
A comparison of autotrophic (AD) and heterotrophic (HD) cathodic denitrification in a Microbial Fuel Cell (MFC) was made in this study. Denitrifying microbial consortia were developed from cow manure and soil and acclimatized under AD and HD conditions. The AD MFC supported the power output of 4.45 W m-3 while removing nitrate nitrogen (NO3--N) at the rate of 0.118 kg NO3--N m-3 d-1. Significant power output (3.02 W m-3) and nitrate removal rate (2.06 kg NO3--N m-3 d-1) were achieved in HD MFC. Further, 16S rDNA based community analysis revealed higher diversity in HDMFC. The genus Thauera and Pseudomonas were predominant in ADMFC while genus Klebsiella and Alkaliphilus were abundant in HDMFC. The abundance of the denitrifying genes namely narG, nirS, and nosZ were assessed with the help of quantitative PCR and presence of all the genes in both the conditions ensured the necessary molecular requirements for complete denitrification.
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Affiliation(s)
- Ankisha Vijay
- Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur 342037, Rajasthan, India
| | - Meenu Chhabra
- Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur 342037, Rajasthan, India.
| | - Tessy Vincent
- Process Development Division, Nuclear Recycle Group, Bhabha Atomic Research Centre (BARC), Trombay, 400085 Mumbai, India
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33
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Ren X, Chen Y, Guo L, She Z, Gao M, Zhao Y, Shao M. The influence of Fe 2+, Fe 3+ and magnet powder (Fe 3O 4) on aerobic granulation and their mechanisms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 164:1-11. [PMID: 30092387 DOI: 10.1016/j.ecoenv.2018.07.072] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 07/18/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
This study aimed to develop an aerobic granular sludge and understand the granulation process of the multi-iron ions. Four sequencing batch reactors (SBRs) were applied to elucidate the effect of Fe2+, Fe3+ and Fe3O4 addition on aerobic granulation. The results confirmed that the start-up time of aerobic granulation with Fe3O4 addition (11 days) was notably less than that with Fe2+ (16 days) and Fe3+ (27 days) addition. Larger granules achieved with Fe3O4 addition with a sludge volume index (SVI30) of 28.50 mL/g and settling velocity of 49.68 m/h. Scanning electron microscope (SEM) analysis further revealed that the presence of mineral crystal in the granule core with Fe2+ and Fe3O4 addition accelerated the granule formation and maintained the stability of the structure. Extracellular polymeric substances (EPS) were studied using three-dimensional-excitation emission matrix (3D-EEM) fluorescence spectra technology to gain a comprehensive view of the interactions between EPS and Fe2+, Fe3+ and Fe3O4. Around 94.76% and 97.68% removal rate was noted for COD and ammonia in the granulation process. Finally, the dominant functional species involved in biological nutrients removal and granule formation were identified by high throughput sequencing technology to assess the effects of Fe2+, Fe3+ and Fe3O4 to granule at the molecular level.
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Affiliation(s)
- Xiaomin Ren
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yue Chen
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environmental and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
| | - Zonglian She
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Mengchun Gao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yangguo Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Mengyu Shao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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34
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Comparison of performance and microbial communities in a bioelectrochemical system for simultaneous denitrification and chromium removal: Effects of pH. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.08.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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35
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Kinetic competition between microbial anode respiration and nitrate respiration in a bioelectrochemical system. Bioelectrochemistry 2018; 123:241-247. [DOI: 10.1016/j.bioelechem.2018.06.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 12/07/2022]
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36
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Xing W, Li J, Li D, Hu J, Deng S, Cui Y, Yao H. Stable-Isotope Probing Reveals the Activity and Function of Autotrophic and Heterotrophic Denitrifiers in Nitrate Removal from Organic-Limited Wastewater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7867-7875. [PMID: 29902378 DOI: 10.1021/acs.est.8b01993] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Combined heterotrophic and autotrophic denitrification (HAD) is a sustainable and practical method for removing nitrate from organic-limited wastewater. However, the active microorganisms responsible for denitrification in wastewater treatment have not been clearly identified. In this study, a combined microelectrolysis, heterotrophic, and autotrophic denitrification (CEHAD) process was established. DNA-based stable isotope probing was employed to identify the active denitrifiers in reactors fed with either 13C-labeled inorganic or organic carbon sources. The total nitrogen removal efficiencies reached 87.2-92.8% at a low organic carbon concentration (20 mg/L COD). Real-time polymerase chain reaction of the nirS gene as a function of the DNA buoyant density following the ultracentrifugation of the total DNA indicated marked 13C-labeling of active denitrifiers. High-throughput sequencing of the fractionated DNA in H13CO3-/12CH312COO--fed and H12CO3-/13CH313COO--fed reactors revealed that Thermomonas-like phylotypes were labeled by 13C-bicarbonate, while Thauera-like and Comamonas-like phylotypes were labeled by 13C-acetate. Meanwhile, Arenimonas-like and Rubellimicrobium-like phylotypes were recovered in the "heavy" DNA fractions from both reactors. These results suggest that nitrate removal in CEHAD is catalyzed by various active microorganisms, including autotrophs, heterotrophs, and mixotrophs. Our findings provide a better understanding of the mechanism of nitrogen removal from organic-limited water and wastewater and can be applied to further optimize such processes.
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Affiliation(s)
- Wei Xing
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard , Beijing 100044 , China
| | - Jinlong Li
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
| | - Desheng Li
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard , Beijing 100044 , China
| | - Jincui Hu
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
| | - Shihai Deng
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
| | - Yuwei Cui
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
| | - Hong Yao
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard , Beijing 100044 , China
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37
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Zhang S, Bao R, Lu J, Sang W. Simultaneous sulfide removal, nitrification, denitrification and electricity generation in three-chamber microbial fuel cells. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.12.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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38
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An alternative carbon source withdrawn from anaerobic fermentation of soybean wastewater to improve the deep denitrification of tail water. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.01.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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39
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Yun H, Liang B, Kong D, Wang A. Improving biocathode community multifunctionality by polarity inversion for simultaneous bioelectroreduction processes in domestic wastewater. CHEMOSPHERE 2018; 194:553-561. [PMID: 29241129 DOI: 10.1016/j.chemosphere.2017.12.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/05/2017] [Accepted: 12/06/2017] [Indexed: 06/07/2023]
Abstract
Bioelectrochemical systems (BESs) have been tentatively applied for wastewater treatment processes, but the complex composition of wastewater could lead to difficulties in establishing functional biofilm or result in performance instability. Few studies have investigated the enrichment of biocathode with domestic wastewater (DW) and the function. A biocathode with multi-pollutant removal capabilities was enriched based on polarity inverted bioanode, which was established with DW. The biocathode function was examined using model pollutants (nitrate, nitrobenzene and Acid Orange 7) supplemented as sole or mixed electron acceptors. When compared to the anaerobic control treatment, the biofilm demonstrated significantly enhanced reduction abilities in the open circuit. For the closed circuit, their removal efficiencies were further enhanced for both the sole and mixed substrates conditions. The bioanodes community structure and diversity markedly changed after operating for 50 d as biocathodes. The biocathode multifunctionality and stability could be related to the maintenance of organic matters fermentative bacteria (mainly belonging to Bacteroidetes, Firmicutes and Synergistetes) and the enrichment of versatile pollutant-reducing bacteria (e.g. Pseudomonas, Thauera and Comamonas from Proteobacteria). Other pollutants, such as perchlorate, sulfate, heavy metals, and halogenated organics, may also work as potential electron acceptors. This study provides a new strategy to improve the biocathode community multifunctionality for simultaneous bioelectroreduction, which can be combined with other wastewater treatment processes in actual application.
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Affiliation(s)
- Hui Yun
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, China
| | - Bin Liang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Deyong Kong
- Shenyang Academy of Environmental Sciences, Shenyang, 110167, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Aijie Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
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40
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Mamet SD, Ma B, Ulrich A, Schryer A, Siciliano SD. Who Is the Rock Miner and Who Is the Hunter? The Use of Heavy-Oxygen Labeled Phosphate (P 18O 4) to Differentiate between C and P Fluxes in a Benzene-Degrading Consortium. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:1773-1786. [PMID: 29378402 DOI: 10.1021/acs.est.7b05773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Phosphorus availability and cycling in microbial communities is a key determinant of bacterial activity. However, identifying organisms critical to P cycling in complex biodegrading consortia has proven elusive. Here we assess a new DNA stable isotope probing (SIP) technique using heavy oxygen-labeled phosphate (P18O4) and its effectiveness in pure cultures and a nitrate-reducing benzene-degrading consortium. First, we successfully labeled pure cultures of Gram-positive Micrococcus luteus and Gram-negative Bradyrhizobium elkanii and separated isotopically light and heavy DNA in pure cultures using centrifugal analyses. Second, using high-throughput amplicon sequencing of 16S rRNA genes to characterize active bacterial taxa (13C-labeled), we found taxa like Betaproteobacteria were key in denitrifying benzene degradation and that other degrading (nonhydrocarbon) inactive taxa (P18O4-labeled) like Staphylococcus and Corynebacterium may promote degradation through production of secondary metabolites (i.e., "helper" or "rock miner" bacteria). Overall, we successfully separated active and inactive taxa in contaminated soils, demonstrating the utility of P18O4-DNA SIP for identifying actively growing bacterial taxa. We also identified potential "miner" bacteria that choreograph hydrocarbon degradation by other microbes (i.e., the "hunters") without directly degrading contaminants themselves. Thus, while several taxa degrade benzene under denitrifying conditions, microbial benzene degradation may be enhanced by both direct degraders and miner bacteria.
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Affiliation(s)
- Steven D Mamet
- Department of Soil Science, University of Saskatchewan , Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Bin Ma
- Department of Civil and Environmental Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Ania Ulrich
- Department of Civil and Environmental Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Aimée Schryer
- Department of Soil Science, University of Saskatchewan , Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Steven D Siciliano
- Department of Soil Science, University of Saskatchewan , Saskatoon, Saskatchewan S7N 5A8, Canada
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41
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Effect of long-term fertilization strategies on bacterial community composition in a 35-year field experiment of Chinese Mollisols. AMB Express 2018; 8:20. [PMID: 29442257 PMCID: PMC5811423 DOI: 10.1186/s13568-018-0549-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/05/2018] [Indexed: 11/10/2022] Open
Abstract
Bacteria play vital roles in soil biological fertility; however, it remains poorly understood about their response to long-term fertilization in Chinese Mollisols, especially when organic manure is substituted for inorganic nitrogen (N) fertilizer. To broaden our knowledge, high-throughput pyrosequencing and quantitative PCR were used to explore the impacts of inorganic fertilizer and manure on bacterial community composition in a 35-year field experiment of Chinese Mollisols. Soils were collected from four treatments: no fertilizer (CK), inorganic phosphorus (P) and potassium (K) fertilizer (PK), inorganic P, K, and N fertilizer (NPK), and inorganic P and K fertilizer plus manure (MPK). All fertilization differently changed soil properties. Compared with CK, the PK and NPK treatments acidified soil by significantly decreasing soil pH from 6.48 to 5.53 and 6.16, respectively, while MPK application showed no significant differences of soil pH, indicating alleviation of soil acidification. Moreover, all fertilization significantly increased soil organic matter (OM) and soybean yields, with the highest observed under MPK regime. In addition, the community composition at each taxonomic level varied considerably among the fertilization strategies. Bacterial taxa, associated with plant growth promotion, OM accumulation, disease suppression, and increased soil enzyme activity, were overrepresented in the MPK regime, while they were present at low abundant levels under NPK treatment, i.e. phyla Proteobacteria and Bacteroidetes, class Alphaproteobacteria, and genera Variovorax, Chthoniobacter, Massilia, Lysobacter, Catelliglobosispora and Steroidobacter. The application of MPK shifted soil bacterial community composition towards a better status, and such shifts were primarily derived from changes in soil pH and OM.
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Wang X, Ye C, Zhang Z, Guo Y, Yang R, Chen S. Effects of temperature shock on N 2O emissions from denitrifying activated sludge and associated active bacteria. BIORESOURCE TECHNOLOGY 2018; 249:605-611. [PMID: 29091844 DOI: 10.1016/j.biortech.2017.10.070] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 10/15/2017] [Accepted: 10/18/2017] [Indexed: 06/07/2023]
Abstract
To investigate the effects of temperature shock on N2O emissions, four treatments with rapidly changing incubation temperature from the control (20 °C) to 4, 12, 25, or 34 °C were conducted. Results showed that higher N2O emissions (0.023-0.37%) were observed when reactor contents received temperature shocks. N2O emissions increased as the temperature interval increased. Nitrate, nitrite, and nitrous oxide reduction rates generally followed the order: 34 °C > 25 °C > 20 °C > 12 °C > 4°C. Overall, the low-temperature shocks down-regulated and high-temperature shocks up-regulated the expression of denitrifying genes. However, the transcription rate of norB/nosZ and nirS/nosZ could not explain higher N2O emission. The increased N2O emissions might be more related to post-transcriptional regulation and enzyme activity (Q10 value). The results of cDNA sequencing showed that the active microbial community was relatively stable. Among the members of top 15 genera with active transcripts, Flavobacterium, Comamonadaceae and Xanthomonadales were the dominant denitrifying bacteria.
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Affiliation(s)
- Xiaojun Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Chengsong Ye
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Zhaoji Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yan Guo
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Ruili Yang
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Shaohua Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
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43
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Bacterial community composition in the gut content of Lampetra japonica revealed by 16S rRNA gene pyrosequencing. PLoS One 2017; 12:e0188919. [PMID: 29206846 PMCID: PMC5716533 DOI: 10.1371/journal.pone.0188919] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/15/2017] [Indexed: 11/26/2022] Open
Abstract
The composition of the bacterial communities in the hindgut contents of Lampetrs japonica was surveyed by Illumina MiSeq of the 16S rRNA gene. An average of 32385 optimized reads was obtained from three samples. The rarefaction curve based on the operational taxonomic units tended to approach the asymptote. The rank abundance curve representing the species richness and evenness was calculated. The composition of microbe in six classification levels was also analyzed. Top 20 members in genera level were displayed as the classification tree. The abundance of microorganisms in different individuals was displayed as the pie charts at the branch nodes in the classification tree. The differences of top 50 genera in abundance between individuals of lamprey are displayed as a heatmap. The pairwise comparison of bacterial taxa abundance revealed that there are no significant differences of gut microbiota between three individuals of lamprey at a given rarefied depth. Also, the gut microbiota derived from L. japonica displays little similarity with other aquatic organism of Vertebrata after UPGMA analysis. The metabolic function of the bacterial communities was predicted through KEGG analysis. This study represents the first analysis of the bacterial community composition in the gut content of L. japonica. The investigation of the gut microbiota associated with L. japonica will broaden our understanding of this unique organism.
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44
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Tang R, Wu D, Chen W, Feng C, Wei C. Biocathode denitrification of coke wastewater effluent from an industrial aeration tank: Effect of long-term adaptation. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2017.05.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Zhang Y, Xu W, Xiang Y, Xie B, Liu H, Wu L, Liang D. Kinetics and gene diversity of denitrifying biocathode in biological electrochemical systems. RSC Adv 2017. [DOI: 10.1039/c7ra04070a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biocathodic nitrogen degradation kinetics match Monod model and Pseudomonas play an important role on denitrification biocathodes with different nitrogen substrates.
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Affiliation(s)
- Yongjia Zhang
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Space & Environment
- Beihang University
- Beijing 100191
- PR China
| | - Weiwei Xu
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Space & Environment
- Beihang University
- Beijing 100191
- PR China
| | - Yan Xiang
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Space & Environment
- Beihang University
- Beijing 100191
- PR China
| | - Beizhen Xie
- Institution of Environmental Biology and Life Support Technology
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- PR China
| | - Hong Liu
- Institution of Environmental Biology and Life Support Technology
- School of Biological Science and Medical Engineering
- Beihang University
- Beijing 100191
- PR China
| | - Lina Wu
- School of Environment and Energy Engineering
- Beijing University of Civil Engineering and Architecture
- Beijing 100044
- PR China
| | - Dawei Liang
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Space & Environment
- Beihang University
- Beijing 100191
- PR China
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46
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Hu D, Zhou Z, Niu T, Wei H, Dou W, Jiang LM, Lv Y. Co-treatment of reject water from sludge dewatering and supernatant from sludge lime stabilization process for nutrient removal: A cost-effective approach. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.08.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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47
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Zhang X, Hua X, Yue X. Comparison of bacterial community characteristics between complete and shortcut denitrification systems for quinoline degradation. Appl Microbiol Biotechnol 2016; 101:1697-1707. [PMID: 27853855 DOI: 10.1007/s00253-016-7949-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 10/12/2016] [Accepted: 10/18/2016] [Indexed: 01/29/2023]
Abstract
For quinoline-denitrifying degradation, very few researches focused on shortcut denitrification process and its bacterial community characteristics. In this study, complete and shortcut denitrification systems were constructed simultaneously for quinoline degradation. By calculation, specific quinoline removal rates were 0.905 and 1.123 g/(gVSS d), respectively, in the complete and shortcut systems, and the latter was 1.24 times of the former. Polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), high-throughput sequencing, and quantitative PCR (qPCR) techniques based on 16S rRNA were jointly applied to compare microbial community structures of two systems. Many denitrifying bacteria phyla, classes, and genera were detected in the two systems. Phylum Proteobacteria, Class Gammaproteobacteria, and Genus Alicycliphilus denitrificans were the dominant contributors for quinoline-denitrifying degradation. In the shortcut denitrification system, main and specific strains playing crucial roles were more; the species richness and the total abundance of functional genes (narG, nirS, nirK, and nosZ) were higher compared with the complete denitrification system. It could be supposed that inorganic-nitrogen reductase activity of bacterial community was stronger in the shortcut denitrification system, which was the intrinsic reason to result in higher denitrification rate.
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Affiliation(s)
- Xiaomei Zhang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Xiufu Hua
- Department of Scientific Research and Development, Tsinghua University, Beijing, 100084, China.
| | - Xiuping Yue
- Environmental Science and Engineering Institute, Taiyuan University of Technology, 79 Yingze West St., Taiyuan, 030024, China
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48
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Xiao Z, Awata T, Zhang D, Zhang C, Li Z, Katayama A. Enhanced denitrification of Pseudomonas stutzeri by a bioelectrochemical system assisted with solid-phase humin. J Biosci Bioeng 2016; 122:85-91. [DOI: 10.1016/j.jbiosc.2015.11.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 10/21/2015] [Accepted: 11/12/2015] [Indexed: 11/27/2022]
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49
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Zhao H, Zhao J, Li F, Li X. Performance of Denitrifying Microbial Fuel Cell with Biocathode over Nitrite. Front Microbiol 2016; 7:344. [PMID: 27047462 PMCID: PMC4801849 DOI: 10.3389/fmicb.2016.00344] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 03/03/2016] [Indexed: 11/13/2022] Open
Abstract
Microbial fuel cell (MFC) with nitrite as an electron acceptor in cathode provided a new technology for nitrogen removal and electricity production simultaneously. The influences of influent nitrite concentration and external resistance on the performance of denitrifying MFC were investigated. The optimal effectiveness were obtained with the maximum total nitrogen (TN) removal rate of 54.80 ± 0.01 g m(-3) d(-1). It would be rather desirable for the TN removal than electricity generation at lower external resistance. Denaturing gradient gel electrophoresis suggested that Proteobacteria was the predominant phylum, accounting for 35.72%. Thiobacillus and Afipia might benefit to nitrite removal. The presence of nitrifying Devosia indicated that nitrite was oxidized to nitrate via a biochemical mechanism in the cathode. Ignavibacterium and Anaerolineaceae was found in the cathode as a heterotrophic bacterium with sodium acetate as substrate, which illustrated that sodium acetate in anode was likely permeated through proton exchange membrane to the cathode.
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Affiliation(s)
- Huimin Zhao
- Department of Environmental Engineering, School of Environmental Science and Engineering, Chang'an UniversityXi'an, China; Department of Chemistry and Chemical Engineering, Heze UniversityHeze, China
| | - Jianqiang Zhao
- Department of Environmental Engineering, School of Environmental Science and Engineering, Chang'an University Xi'an, China
| | - Fenghai Li
- Department of Chemistry and Chemical Engineering, Heze University Heze, China
| | - Xiaoling Li
- Department of Environmental Engineering, School of Environmental Science and Engineering, Chang'an University Xi'an, China
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50
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Zhang L, Jiang X, Shen J, Xu K, Li J, Sun X, Han W, Wang L. Enhanced bioelectrochemical reduction of p-nitrophenols in the cathode of self-driven microbial fuel cells. RSC Adv 2016. [DOI: 10.1039/c6ra04293g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Reduction from PNP to PAP was enhanced by diverse bacteria on the cathode, with no energy input to the system.
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Affiliation(s)
- Libin Zhang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Xinbai Jiang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Jinyou Shen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Kaichun Xu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Jiansheng Li
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Xiuyun Sun
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Weiqing Han
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Lianjun Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
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