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Ye Y, Yan X, Luo H, Kang J, Liu D, Ren Y, Ngo HH, Guo W, Cheng D, Jiang W. Comparative study of the removal of sulfate by UASB in light and dark environment. Bioprocess Biosyst Eng 2024; 47:943-955. [PMID: 38703203 DOI: 10.1007/s00449-024-03024-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 04/23/2024] [Indexed: 05/06/2024]
Abstract
At present, the application of sewage treatment technologies is restricted by high sulfate concentrations. In the present work, the sulfate removal was biologically treated using an upflow anaerobic sludge blanket (UASB) in the absence/presence of light. First, the start-up of UASB for the sulfate removal was studied in terms of COD degradation, sulfate removal, and effluent pH. Second, the impacts of different operation parameters (i.e., COD/SO42- ratio, temperature and illumination time) on the UASB performance were explored. Third, the properties of sludge derived from the UASB at different time were analyzed. Results show that after 28 days of start-up, the COD removal efficiencies in both the photoreactor and non-photoreactor could reach a range of 85-90% while such reactors could achieve > 90% of sulfate being removed. Besides, higher illumination time could facilitate the removal of pollutants in the photoreactor. To sum up, the present study can provide technical support for the clean removal of sulfate from wastewater using photoreactors.
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Affiliation(s)
- Yuanyao Ye
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, China
- Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Xueyi Yan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, China
- Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Hui Luo
- Chengdu Garbage Sorting Management & Service Center, Chengdu, 610095, China
| | - Jianxiong Kang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, China
- Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Dongqi Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, China
- Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Yongzheng Ren
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, China
- Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Dongle Cheng
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China
| | - Wei Jiang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan, 430074, China.
- Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China.
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2
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Stiegler A, Cecchetti AR, Scholes RC, Sedlak DL. Persistent Trace Organic Contaminants Are Transformed Rapidly under Sulfate- and Fe(III)-Reducing Conditions in a Nature-Based Subsurface Water Treatment System. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:16616-16627. [PMID: 37856881 PMCID: PMC10620999 DOI: 10.1021/acs.est.3c03719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/25/2023] [Accepted: 09/28/2023] [Indexed: 10/21/2023]
Abstract
Subsurface treatment systems, such as constructed wetlands, riverbank filtration systems, and managed aquifer recharge systems, offer a low-cost means of removing trace organic contaminants from treated municipal wastewater. To assess the processes through which trace organic contaminants are removed in subsurface treatment systems, pharmaceuticals and several major metabolites were measured in porewater, sediment, and plants within a horizontal levee (i.e., a subsurface flow wetland that receives treated municipal wastewater). Concentrations of trace organic contaminants in each wetland compartment rapidly declined along the flow path. Mass balance calculations, analysis of transformation products, microcosm experiments, and one-dimensional transport modeling demonstrated that more than 60% of the contaminant removal could be attributed to transformation. Monitoring of the system with and without nitrate in the wetland inflow indicated that relatively biodegradable trace organic contaminants, such as acyclovir and metoprolol, were rapidly transformed under both operating conditions. Trace organic contaminants that are normally persistent in biological treatment systems (e.g., sulfamethoxazole and carbamazepine) were removed only when Fe(III)- and sulfate-reducing conditions were observed. Minor structural modifications to trace organic contaminants (e.g., hydroxylation) altered the pathways and extents of trace organic contaminant transformation under different redox conditions. These findings indicate that subsurface treatment systems can be designed to remove both labile and persistent trace organic contaminants via transformation if they are designed and operated in a manner that results in sulfate-and Fe(III)-reducing conditions.
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Affiliation(s)
- Angela
N. Stiegler
- Department
of Civil & Environmental Engineering, University of California, Berkeley Berkeley, California 94720, United States
- Engineering
Research Center (ERC) for Reinventing the Nation’s Urban Water
Infrastructure (ReNUWIt), Stanford University, Stanford, California 94305, United States
| | - Aidan R. Cecchetti
- Department
of Civil & Environmental Engineering, University of California, Berkeley Berkeley, California 94720, United States
- Engineering
Research Center (ERC) for Reinventing the Nation’s Urban Water
Infrastructure (ReNUWIt), Stanford University, Stanford, California 94305, United States
| | - Rachel C. Scholes
- Department
of Civil & Environmental Engineering, University of California, Berkeley Berkeley, California 94720, United States
- Engineering
Research Center (ERC) for Reinventing the Nation’s Urban Water
Infrastructure (ReNUWIt), Stanford University, Stanford, California 94305, United States
| | - David L. Sedlak
- Department
of Civil & Environmental Engineering, University of California, Berkeley Berkeley, California 94720, United States
- Engineering
Research Center (ERC) for Reinventing the Nation’s Urban Water
Infrastructure (ReNUWIt), Stanford University, Stanford, California 94305, United States
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3
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Kieu TQH, Nguyen TY, Do CL. Treatment of Organic and Sulfate/Sulfide Contaminated Wastewater and Bioelectricity Generation by Sulfate-Reducing Bioreactor Coupling with Sulfide-Oxidizing Fuel Cell. Molecules 2023; 28:6197. [PMID: 37687026 PMCID: PMC10488401 DOI: 10.3390/molecules28176197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/19/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
A wastewater treatment system has been established based on sulfate-reducing and sulfide-oxidizing processes for treating organic wastewater containing high sulfate/sulfide. The influence of COD/SO42- ratio and hydraulic retention time (HRT) on removal efficiencies of sulfate, COD, sulfide and electricity generation was investigated. The continuous operation of the treatment system was carried out for 63 days with the optimum COD/SO42- ratio and HRT. The result showed that the COD and sulfate removal efficiencies were stable, reaching 94.8 ± 0.6 and 93.0 ± 1.3% during the operation. A power density level of 18.0 ± 1.6 mW/m2 was obtained with a sulfide removal efficiency of 93.0 ± 1.2%. However, the sulfide removal efficiency and power density decreased gradually after 45 days. The results from scanning electron microscopy (SEM) with an energy dispersive X-ray (EDX) show that sulfur accumulated on the anode, which could explain the decline in sulfide oxidation and electricity generation. This study provides a promising treatment system to scale up for its actual applications in this type of wastewater.
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Affiliation(s)
- Thi Quynh Hoa Kieu
- Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Faculty of Biotechnology, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau Giay, Hanoi 100000, Vietnam
| | - Thi Yen Nguyen
- Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Chi Linh Do
- Institute of Material Sciences, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
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4
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Xu Y, Zhang D, Xue Q, Bu C, Wang Y, Zhang B, Wang Y, Qin Q. Long-term nitrogen and phosphorus removal, shifts of functional bacteria and fate of resistance genes in bioretention systems under sulfamethoxazole stress. J Environ Sci (China) 2023; 126:1-16. [PMID: 36503739 DOI: 10.1016/j.jes.2022.03.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/24/2022] [Accepted: 03/31/2022] [Indexed: 06/17/2023]
Abstract
To understand the long-term performance of bioretention systems under sulfamethoxazole (SMX) stress, an unplanted bioretention system (BRS) and two modified BRSs with coconut-shell activated carbon (CAC) and CAC/zero-valent-iron (Fe0) granules (CAC-BRS and Fe/CAC-BRS) were established. Both CAC-BRS and Fe/CAC-BRS significantly outperformed BRS in removing total nitrogen (TN) (CAC-BRS: 82.48%; Fe/CAC-BRS: 78.08%; BRS: 47.51%), total phosphorous (TP) (CAC-BRS: 79.36%; Fe/CAC-BRS: 98.26%; BRS: 41.99%), and SMX (CAC-BRS: 99.74%, Fe/CAC-BRS: 99.80%; BRS: 23.05%) under the long-term SMX exposure (0.8 mg/L, 205 days). High-throughput sequencing revealed that the microbial community structures of the three BRSs shifted greatly in upper zones after SMX exposure. Key functional genera, dominantly Nitrospira, Rhodoplanes, Desulfomicrobium, Geobacter, were identified by combining the functional prediction by the FAPROTAX database with the dominant genera. The higher abundance of nitrogen functional genes (nirK, nirS and nosZ) in CAC-BRS and Fe/CAC-BRS might explain the more efficient TN removal in these two systems. Furthermore, the relative abundance of antibiotic-resistant genes (ARGs) sulI and sulII increased in all BRSs along with SMX exposure, suggesting the selection of bacteria containing sul genes. Substrates tended to become reservoirs of sul genes. Also, co-occurrence network analysis revealed distinct potential host genera of ARGs between upper and lower zones. Notably, Fe/CAC-BRS succeeded to reduce the effluent sul genes by 1-2 orders of magnitude, followed by CAC-BRS after 205-day exposure. This study demonstrated that substrate modification was crucial to maintain highly efficient nutrients and SMX removals, and ultimately extend the service life of BRSs in treating SMX wastewater.
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Affiliation(s)
- Yan Xu
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
| | - Danyi Zhang
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
| | - Qingju Xue
- Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences (NIGLAS), Nanjing 210008, China
| | - Chibin Bu
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing 210096, China
| | - Yajun Wang
- School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Benchi Zhang
- Department of Environmental Systems Engineering, University of Regina, SK S4S0A2, Canada
| | - Ying Wang
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
| | - Qingdong Qin
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China.
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5
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Yang L, Luo Y, Zhou Y, Huang C, Shen X. Specific nanoantibiotics for selective removal of antibiotic-resistant bacteria: New insights in bacterial imprinting based on interfacial biomimetic mineralization. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130254. [PMID: 36356522 DOI: 10.1016/j.jhazmat.2022.130254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/28/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
Antibiotic resistance has been a worsening global concern and selective elimination of antibiotic-resistant bacteria (ARB) while retaining the co-existed beneficial bacteria has been essential in environmental protection, which having attracted considerable interest. In this work, by integrating the whole cell imprinting and epitope imprinting strategy, magnetic bacterial imprinted polymers (BIPs) towards ARB were synthesized with interfacial biomimetic mineralization followed by a screening process. The binding data showed that the BIPs owned highly specific affinity towards the target bacteria. Taking advantage of this specific binding ability of BIPs, a two-step selective antimicrobial approach was developed. Remarkably, the BIP nanoantibiotics (nAbts) could efficiently destroy ARB without harming the beneficial bacteria. In comparison with the non-bacterial imprinted polymers, the biocompatible BIP nAbts showed a 12.5-fold increase in the survival percentage for the beneficial bacteria in wastewater. To the best of our knowledge, this is the first time that bacterial imprinting via interfacial biomimetic mineralization was developed, and also the first report of killing ARB without harming the beneficial bacteria in wastewater. We believe that this strategy provides a new insight into the design of novel affinity materials for the selective elimination of ARB in biological treatment for environmental protection.
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Affiliation(s)
- Liuqian Yang
- State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Yaoyu Luo
- State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Yikai Zhou
- State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Chuixiu Huang
- Department of Forensic Medicine, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei 430030, China.
| | - Xiantao Shen
- State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei 430030, China.
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6
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Xue J, Yao Y, Li W, Shi K, Ma G, Qiao Y, Cheng D, Jiang Q. Insights into the effects of operating parameters on sulfate reduction performance and microbial pathways in the anaerobic sequencing batch reactor. CHEMOSPHERE 2023; 311:137134. [PMID: 36343737 DOI: 10.1016/j.chemosphere.2022.137134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/07/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
Sulfate-reducing bacteria (SRB)-based anaerobic process has aroused wide concern in the treatment of sulfate-containing wastewater. Chemical oxygen demand-to-sulfate ratio (COD/SO42-) and HRT are two key factors that affect not only the anaerobic treatment performance but also the activity of SRB. In this study, an anaerobic sequencing batch reactor was constructed, and the effects of different operating parameters (COD/SO42-, HRT) on the relationship of sulfate (SO42-) reduction performance, microbial communities, and metabolic pathways were comprehensively investigated. The results indicated that the SO42- removal rates could achieve above 95% under different operating parameters. Bioinformatics analysis revealed that microbial community changed with reactor operation. At the genus level, the enrichment of Propionicclava and Peptoclostridium contributed to the establishment of a homotrophic relationship with Desulfobulbus, the dominant SRB in the reactor, which indicated that they took vital part in maintaining the structural and functional stability of the bacterial community under different operating parameters. In particular, an increasing trend of the relative abundance of functional genes encoding dissimilatory sulfate reduction was detected with the increase of COD/SO42-, which indicated high SO42- reduction potentials. This knowledge will help to reveal the mechanism of the effect of operating parameters on the anaerobic sulfate removal process, thus providing effective guidance for the targeted regulation of anaerobic sequencing batch bioreactors treating SO42--containing wastewater.
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Affiliation(s)
- Jianliang Xue
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China; Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Shandong University of Science and Technology, China; Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, Shandong, 256600, China
| | - Yuehong Yao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China
| | - Weisi Li
- Shandong Ecological Environment Monitoring Center, Jinan, Shandong, 250102, China
| | - Ke Shi
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China
| | - Guanbao Ma
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China
| | - Yanlu Qiao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China; Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Shandong University of Science and Technology, China; Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, Shandong, 256600, China
| | - Dongle Cheng
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Qing Jiang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China; Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Shandong University of Science and Technology, China; Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou University, Binzhou, Shandong, 256600, China.
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7
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Du R, Hu Y, Nitta S, Ji J, Li YY. Material mass balance and elemental flow analysis in a submerged anaerobic membrane bioreactor for municipal wastewater treatment towards low-carbon operation and resource recovery. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158586. [PMID: 36075441 DOI: 10.1016/j.scitotenv.2022.158586] [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: 04/28/2022] [Revised: 08/15/2022] [Accepted: 09/03/2022] [Indexed: 06/15/2023]
Abstract
The anaerobic membrane bioreactor (AnMBR) has gained huge attention as a municipal wastewater (MWW) treatment process that combined high organics removal, a low sludge yield and bioenergy recovery. In this study, a 20 L AnMBR was set up and operated steadily for 70 days in temperate conditions with an HRT of 6 h and a flux of 12 LMH for the treatment of real MWW, focusing on the behavior of the major elements (C, N, P and S) from an elemental balance perspective. The results showed that the AnMBR achieved more than 85 % COD removal, a low sludge yield (0.081 gVSS/gCODremoved) and high methane production (0.31 L-CH4/gCODremoved) close to the theoretical value. The elemental flow analysis revealed that the AnMBR converted 77 % of the influent COD to methane (57 % gaseous and 20 % dissolved) and 6 % of the COD for sludge production. In addition, the AnMBR converted 34 % of the total carbon to energy-generated carbon, and only 3 % was in the form of CO2 in the biogas for further upgradation, which was in line with the concept of carbon neutrality. Since little nitrogen or phosphorus were removed, the permeate was nutrient-rich and further treatment to recover the nutrients would be required. This study illustrates the superior performance of the AnMBR for MWW treatment with a microscopic view of elemental behavior and provides a reference for implementing the mainstream AnMBR process in carbon-neutral wastewater treatment plants.
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Affiliation(s)
- Runda Du
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Yisong Hu
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
| | - Shiori Nitta
- Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki-Aza, Sendai, Miyagi 980-8579, Japan
| | - Jiayuan Ji
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki-Aza, Sendai, Miyagi 980-8579, Japan.
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8
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Decru SO, Baeten JE, Cui YX, Wu D, Chen GH, Volcke EIP. Model-based analysis of sulfur-based denitrification in a moving bed biofilm reactor. ENVIRONMENTAL TECHNOLOGY 2022; 43:2948-2955. [PMID: 33775225 DOI: 10.1080/09593330.2021.1910349] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
In this study, a biofilm model was developed for sulfur-based denitrification in a moving bed biofilm reactor (MBBR), including mass transport as well as the conversion kinetics of sulfur-oxidizing bacteria (SOB). The experimental reactor simulated received a synthetic wastewater containing nitrate, sulfide and thiosulfate. The substrate affinity of SOB for intermediary elemental sulfur (S0) was found the most sensitive parameter. After estimating this single parameter, the model could adequately describe the steady state performance of the experimental MBBR. The experimental and simulated mass balances indicated that a fraction of influent sulfur accumulated into intermediate S0. Furthermore, the simulations showed that SOB were active over the entire thickness of a 200 µm biofilm. The simulation results allowed to quantify the extent of diffusion and substrate limitation. Scenario analyses indicated that the specific nitrogen loading rate could be increased from 0.05 to 0.20 kg N.kg-1 VSS.day-1 (corresponding to 0.22-0.86 kg N.m-2.day-1 expressed per biofilm surface area) while maintaining nitrogen removal efficiencies above 70%. An increasing specific nitrogen loading rate in this range resulted in an almost linearly increasing specific nitrogen removal rate, independent from whether it was realized through a decreasing HRT, carrier filling ratio or biofilm thickness.
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Affiliation(s)
- S O Decru
- BioCo Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University Gent, Belgium
| | - J E Baeten
- BioCo Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University Gent, Belgium
| | - Y-X Cui
- Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - D Wu
- Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - G-H Chen
- Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - E I P Volcke
- BioCo Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University Gent, Belgium
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9
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Hydrogen Sulfide Production with a Microbial Consortium Isolated from Marine Sediments Offshore. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2022. [DOI: 10.3390/jmse10030436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Hydrogen, electric energy production, and metal toxic bioremediation are some of the biotechnological applications of sulfate-reducing organisms, which potentially depend on the sulfide produced. In this study, offshore of Yucatan, the capacity to produce hydrogen sulfide using microbial consortia from marine sediment (SC469, PD102, SD636) in batch reactors was evaluated. Kinetic tests were characterized by lactate oxidation to acetate, propionate, CO2 and methane. The inoculum SC469, located in open-ocean, differed strongly in microbial diversity and showed better performance in substrate utilization with the highest hydrogen sulfide production (246 mmolg−1 VSS) at a specific hydrogen sulfide rate of 113 mmol g−1 VSS d−1 with a 0.79 molar ratio of sulfate/lactate. Sulfate-reducing microbial consortia enriched in the laboratory from marine sediments collected offshore in Yucatan and with a moderate eutrophication index, differed strongly in microbial diversity with loss of microorganisms with greater capacity for degradation of organic macromolecules. The sulfate-reducing microorganisms were characterized using Illumina MiSeq technology and were mainly Desulfomicrobium, Clostridium and Desulfobacter.
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10
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Zan F, Tang W, Jiang F, Chen G. Diversion of food waste into the sulfate-laden sewer: Interaction and electron flow of sulfidogenesis and methanogenesis. WATER RESEARCH 2021; 202:117437. [PMID: 34298275 DOI: 10.1016/j.watres.2021.117437] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/03/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Diverting food waste (FW) into the sulfate-laden sewer may pose a significant influence on the production of methane and sulfide in sewers. Identifying microbial electron utilization is essential to understanding the interaction of sulfidogenesis and methanogenesis in depth. Here, we reported sulfide and methane production from the sewer bioreactors receiving sulfate-laden wastewater (160 mg S/L), with and without FW addition. Long-term monitoring showed that the addition of FW (1 g/L) could boost both sulfide (by 39%) and methane (by 44%) production. As for the electrons used for sulfidogenesis and methanogenesis, about 98% flowed to sulfidogenesis. Cryosection-fluorescence in situ hybridization showed that high sulfate content suppressed the accumulation of methanogens in biofilm outer layer, whereas methanogens in the inner layer were enriched with FW addition. Moreover, the FW addition fostered the diversity of the fermentative bacteria and changed the type of methanogens in biofilms, and up-regulated the key enzymes expressions for sulfidogenesis and methanogenesis. A model-based investigation suggests that increased FW-to-sewage ratios would exert a significant impact on methane production than on sulfide production. The microbial electron flows were highly dependent on sulfate concentration and FW-to-sewage ratios. The findings of this study suggest that sulfate and substrate levels play a key role in microbial electron utilization for sulfide and methane production, and diverting FW into the sulfate-laden sewer may exert negative impacts on sewer management and the environment.
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Affiliation(s)
- Feixiang Zan
- School of Environmental Science and Engineering, Key Laboratory of Water & Wastewater Treatment, MOHURD, and Hubei Provincial Engineering Research Center for Water Quality Safety and Pollution Control, Huazhong University of Science and Technology, Wuhan, China; Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Wentao Tang
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Feng Jiang
- Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, School of Environmental Science & Engineering, Sun Yat-sen University, Guangzhou, China.
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
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11
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Pérez-Díaz MI, Zárate-Segura P, Bermeo-Fernández LA, Nirmalkar K, Bastida-González F, García-Mena J, Jan-Roblero J, Guerrero-Barajas C. "Bacterial consortium from hydrothermal vent sediments presents electrogenic activity achieved under sulfate reducing conditions in a microbial fuel cell". JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2020; 18:1189-1205. [PMID: 33312634 PMCID: PMC7721773 DOI: 10.1007/s40201-020-00537-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 09/07/2020] [Indexed: 05/27/2023]
Abstract
PURPOSE The aim of the present work was to assess the electrogenic activity of bacteria from hydrothermal vent sediments achieved under sulfate reducing (SR) conditions in a microbial fuel cell design with acetate, propionate and butyrate as electron donors. METHODS Two different mixtures of volatile fatty acids (VFA) were evaluated as the carbon source at two chemical oxygen demand (COD) proportions. The mixtures of VFA used were: acetate, propionate and butyrate COD: 3:0.5:0.5 (stage 1) and acetate - butyrate COD: 3.5:0.5 (stage 2). Periodical analysis of sulfate (SO4 -2), sulfide (HS-) and COD were conducted to assess sulfate reduction (SR) and COD removal along with measurements of voltage and current to assess the global performance of the consortium in the system. RESULTS Percentage of SR was of 97.5 ± 0.7 and 74.3 ± 1.5% for stage 1 and 2, respectively. The % COD removal was of 91 ± 2.1 and 75.3 ± 9.6 for stage 1 and 2, respectively. Although SR and COD removal were higher at stage 1, in regards of energy, stage 2 presented higher current and power densities and Coulombic efficiency as follows: 741.7 ± 30.5 μA/m2, 376 ± 34.4 μW/m2 and 5 ± 2.7%, whereas for stage 1 these values were: 419 ± 71 μA/m2, 52.7 ± 18 μW/m2 and 0.02%, respectively. A metagenomic analysis - stage 2 - in the anodic chamber, demonstrated that SR was due to Dethiosulfovibrionaceae (HA73), Desulfobacter and Desulfococcus and the electrogenic microorganisms were Planococcus, SHD-231, Proteiniclasticum, vadinCA02, and families Porphyromonadacea and Pseudomonadaceae. CONCLUSIONS It was demonstrated that microorganisms prevenient from hydrothermal vent sediments adapted to a microbial fuel cell system are able to generate electricity coupled to 74.3 ± 1.5 and 75.3 ± 9.6% of SR and COD removal respectively, with a mixture of acetate - butyrate.
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Affiliation(s)
- Margarita Isabel Pérez-Díaz
- Laboratorio de Biotecnología Ambiental Posgrado. Departamento de Bioprocesos. Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Instituto Politécnico Nacional, Av. Acueducto s/n, Col. Barrio la Laguna Ticomán, 07340 Mexico City, Mexico
| | - Paola Zárate-Segura
- Laboratorio de Medicina Traslacional, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Col. Santo Tomas, 11340 Mexico City, Mexico
| | - Luis Antonio Bermeo-Fernández
- Laboratorio de Biotecnología Ambiental Posgrado. Departamento de Bioprocesos. Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Instituto Politécnico Nacional, Av. Acueducto s/n, Col. Barrio la Laguna Ticomán, 07340 Mexico City, Mexico
| | - Khemlal Nirmalkar
- Departamento de Genética y Biología Molecular, CINVESTAV – IPN, Av. IPN # 2508, Col. Zacatenco, 07360 Mexico City, Mexico
| | - Fernando Bastida-González
- Laboratorio de Medicina Traslacional, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Col. Santo Tomas, 11340 Mexico City, Mexico
| | - Jaime García-Mena
- Departamento de Genética y Biología Molecular, CINVESTAV – IPN, Av. IPN # 2508, Col. Zacatenco, 07360 Mexico City, Mexico
| | - Janet Jan-Roblero
- Laboratorio de Biotecnología Ambiental. Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. de Carpio y Plan de Ayala s/n, Col. Santo Tomás, 11340 Mexico City, Mexico
| | - Claudia Guerrero-Barajas
- Laboratorio de Biotecnología Ambiental Posgrado. Departamento de Bioprocesos. Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Instituto Politécnico Nacional, Av. Acueducto s/n, Col. Barrio la Laguna Ticomán, 07340 Mexico City, Mexico
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12
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Transcriptome Analysis of the Acid Stress Response of Desulfovibrio vulgaris ATCC 7757. Curr Microbiol 2020; 77:2702-2712. [DOI: 10.1007/s00284-020-02051-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 05/23/2020] [Indexed: 01/23/2023]
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13
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Zan F, Dai J, Jiang F, Ekama GA, Chen G. Ground food waste discharge to sewer enhances methane gas emission: A lab-scale investigation. WATER RESEARCH 2020; 174:115616. [PMID: 32145553 DOI: 10.1016/j.watres.2020.115616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/01/2020] [Accepted: 02/11/2020] [Indexed: 06/10/2023]
Abstract
Emission of sulfide and methane from sewerage system has been a major concern for a long time. Sewers are now facing emerging challenges, such as receiving food waste (FW) to relieve the burdens on solid waste treatment. However, the knowledge of the direct impact of FW addition on sulfide and methane production in and emission from sewers is still lacking. In this study, two lab-scale sewer reactors, one without and one with FW addition, were continuously operated to investigate the production of sulfide and methane and microbial communities arising from FW discharge to freshwater sewerage system. The 190-day long-term monitoring and the batch tests on days 69 and 124 suggest that the FW addition has little impact on sulfide production possibly due to the limited sulfate concentration (40 mg S/L) but enhanced methane production by up to 60%. Moreover, cryosection-fluorescence in situ hybridization (FISH) revealed that the FW addition significantly stimulated the accumulation of methanogenic archaea (MA) in sewer biofilms and altered the spatial distributions of sulfate-reducing bacteria (SRB) and MA. Moreover, the relative abundance of MA in biofilms with FW addition was higher than that without FW addition, whereas the relative abundance of SRB was similar. Metabolic pathway analysis for sulfidogenesis and methanogenesis indicates that sufficient substrates derived from the FW addition were biodegraded during fermentation to produce acetate and hydrogen, and consequently facilitate methanogenesis. These findings shed light on the impacts of changes in wastewater compositions (e.g., FW addition) on sulfide and methane production in the freshwater sewerage system for improved policy-making on sewer management.
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Affiliation(s)
- Feixiang Zan
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Ji Dai
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Feng Jiang
- School of Environmental Science & Engineering, Sun Yat-sen University, Guangzhou, China.
| | - George A Ekama
- Water Research Group, Department of Civil Engineering, University of Cape Town, Cape Town, South Africa
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
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14
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Pellerin A, Antler G, Marietou A, Turchyn AV, Jørgensen BB. The effect of temperature on sulfur and oxygen isotope fractionation by sulfate reducing bacteria (Desulfococcus multivorans). FEMS Microbiol Lett 2020; 367:5817845. [PMID: 32267916 DOI: 10.1093/femsle/fnaa061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 04/04/2020] [Indexed: 11/14/2022] Open
Abstract
Temperature influences microbiological growth and catabolic rates. Between 15 and 35 °C the growth rate and cell specific sulfate reduction rate of the sulfate reducing bacterium Desulfococcus multivorans increased with temperature. Sulfur isotope fractionation during sulfate reduction decreased with increasing temperature from 27.2 ‰ at 15 °C to 18.8 ‰ at 35 °C which is consistent with a decreasing reversibility of the metabolic pathway as the catabolic rate increases. Oxygen isotope fractionation, in contrast, decreased between 15 and 25 °C and then increased again between 25 and 35 °C, suggesting increasing reversibility in the first steps of the sulfate reducing pathway at higher temperatures. This points to a decoupling in the reversibility of sulfate reduction between the steps from the uptake of sulfate into the cell to the formation of sulfite, relative to the whole pathway from sulfate to sulfide. This observation is consistent with observations of increasing sulfur isotope fractionation when sulfate reducing bacteria are living near their upper temperature limit. The oxygen isotope decoupling may be a first signal of changing physiology as the bacteria cope with higher temperatures.
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Affiliation(s)
- André Pellerin
- Center for Geomicrobiology, Ny Munkegade 116, Aarhus C 8000, Aarhus University, Department of Bioscience, Denmark.,Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, P. O. Box 653, Beer-Sheva 84105, Israel
| | - Gilad Antler
- Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, P. O. Box 653, Beer-Sheva 84105, Israel.,The Interuniversity Institute for Marine Sciences of Eilat, PO Box 469, Eilat 88103, Israel
| | - Angeliki Marietou
- Center for Geomicrobiology, Ny Munkegade 116, Aarhus C 8000, Aarhus University, Department of Bioscience, Denmark
| | - Alexandra V Turchyn
- Cambridge University, Downing Street, Cambridge, CB2 3EQ, Departement of Earth Sciences, Cambridge, UK
| | - Bo Barker Jørgensen
- Center for Geomicrobiology, Ny Munkegade 116, Aarhus C 8000, Aarhus University, Department of Bioscience, Denmark
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15
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Zan F, Hao T. Sulfate in anaerobic co-digester accelerates methane production from food waste and waste activated sludge. BIORESOURCE TECHNOLOGY 2020; 298:122536. [PMID: 31835199 DOI: 10.1016/j.biortech.2019.122536] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 06/10/2023]
Abstract
The presence of sulfate in food waste (FW) and waste activated sludge (WAS) threatens the anaerobic co-digestion for methane production. In this study, methane production from the anaerobic co-digestion of FW and WAS at sulfate concentrations of 50, 100, and 400 mg S/L was not affected, but instead deteriorated at 200 and 300 mg S/L. However, a model-based kinetic analysis reveals that sulfate can significantly promote the conversion of rapidly biodegradable substrates by up to 93%. From a point of thermodynamic view, the presence of sulfate can stimulate sulfate-reducing bacteria acting as acetogens to convert propionate to acetate, providing an alternative metabolic pathway for methanogenesis. In the anaerobic co-digestion, regulation of sulfate can be a potential strategy to improve the efficiency of methane production. However, more research is needed to optimize the sulfate concentration and substrate types in the anaerobic co-digester.
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Affiliation(s)
- Feixiang Zan
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Tianwei Hao
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China.
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16
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Yun YM, Lee E, Kim K, Han JI. Sulfate reducing bacteria-based wastewater treatment system integrated with sulfide fuel cell for simultaneous wastewater treatment and electricity generation. CHEMOSPHERE 2019; 233:570-578. [PMID: 31195262 DOI: 10.1016/j.chemosphere.2019.05.206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 04/05/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
This study aimed to design a sulfate-reducing bacteria (SRB)-based wastewater treatment system (SWTS) integrated with a sulfide fuel cell (SFC) as an alternative to the energy-intensive aerobic wastewater treatment process. The result showed that the COD/sulfate ratio and hydraulic retention time (HRT) were two important parameters in a SWTS. The highest COD and sulfate removal efficiency rates were at a HRT of 4 h at a COD/sulfate ratio of 0.67, reaching 83 ± 0.2% and 84 ± 0.4% with sulfate removal rates of 4.087 ± 32 mg SO42-/d, respectively. A microbial analysis revealed that the dominance of nine OTUs belonging to SRB closely affected the high sulfate removal efficiency in the SWTS. At the HRT of 8 h, voltage of 0.02 V and a power density level of 130 mW/m2 were obtained with sulfide removal efficiency of 99 ± 0.5%. These results overall demonstrate that SRB can serve as a green and effective route for wastewater treatment.
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Affiliation(s)
- Yeo-Myeong Yun
- Department of Environmental Engineering, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Eunjin Lee
- Kori Nuclear Power Plant #1, Chemical Engineering Team, Korea Hydro and Nuclear Power Co., Ltd, 96-1 Gilcheon-gil, Jangan-eup, Gijang-gun, Busan, 46036, Republic of Korea
| | - Kwiyong Kim
- Department of Chemical and Biological Engineering, Iowa State University, 618 Bissell Road, Ames, IA, 50011, United States
| | - Jong-In Han
- Department of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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17
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Lim SS, Kim BH, Li D, Feng Y, Daud WRW, Scott K, Yu EH. Effects of Applied Potential and Reactants to Hydrogen-Producing Biocathode in a Microbial Electrolysis Cell. Front Chem 2018; 6:318. [PMID: 30159306 PMCID: PMC6103483 DOI: 10.3389/fchem.2018.00318] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 07/10/2018] [Indexed: 11/13/2022] Open
Abstract
Understanding the mechanism of electron transfer between the cathode and microorganisms in cathode biofilms in microbial electrolysis cells (MECs) for hydrogen production is important. In this study, biocathodes of MECs were successfully re-enriched and subjected to different operating parameters: applied potential, sulfate use and inorganic carbon consumption. It was hypothesized that biocathode catalytic activity would be affected by the applied potentials that initiate electron transfer. While inorganic carbon, in the form of bicarbonate, could be a main carbon source for biocathode growth, sulfate could be a terminal electron acceptor and thus reduced to elemental sulfurs. It was found that potentials more negative than -0.8 V (vs. standard hydrogen electrode) were required for hydrogen production by the biocathode. In additional, a maximum hydrogen production was observed at sulfate and bicarbonate concentrations of 288 and 610 mg/L respectively. Organic carbons were found in the cathode effluents, suggesting that microbial interactions probably happen between acetogens and sulfate reducing bacteria (SRB). The hydrogen-producing biocathode was sulfate-dependent and hydrogen production could be inhibited by excessive sulfate because more energy was directed to reduce sulfate (E° SO 4 2 - /H2S = -0.35 V) than proton (E° H+/H2 = -0.41 V). This resulted in a restriction to the hydrogen production when sulfate concentration was high. Domestic wastewaters contain low amounts of organic compounds and sulfate would be a better medium to enrich and maintain a hydrogen-producing biocathode dominated by SRB. Besides the risks of limited mass transport and precipitation caused by low potential, methane contamination in the hydrogen-rich environment was inevitable in the biocathode after long term operation due to methanogenic activities.
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Affiliation(s)
- Swee Su Lim
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Byung Hong Kim
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia
- Bioelectrochemistry Laboratory, Water Environment and Remediation Research Centre, Korea Institute of Science and Technology, Bongdong-eup, South Korea
| | - Da Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, China
| | | | - Keith Scott
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Eileen Hao Yu
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
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18
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Kumar M, Sinharoy A, Pakshirajan K. Process integration for biological sulfate reduction in a carbon monoxide fed packed bed reactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 219:294-303. [PMID: 29753237 DOI: 10.1016/j.jenvman.2018.04.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 03/26/2018] [Accepted: 04/06/2018] [Indexed: 06/08/2023]
Abstract
This study examined immobilized anaerobic biomass for sulfate reduction using carbon monoxide (CO) as the sole carbon source under batch and continuous fed conditions. The immobilized bacteria with beads made of 10% polyvinyl alcohol (PVA) showed best results in terms of sulfate reduction (84 ± 3.52%) and CO utilization (98 ± 1.67%). The effect of hydraulic retention time (HRT), sulfate loading rate and CO loading rate on sulfate and CO removal was investigated employing a 1L packed bed bioreactor containing the immobilized biomass. At 48, 24 and 12 h HRT, the sulfate removal was 94.42 ± 0.15%, 89.75 ± 0.47% and 61.08 ± 0.34%, respectively, along with a CO utilization of more than 90%. The analysis of variance (ANOVA) of the results obtained showed that only the initial CO concentration significantly affected the sulfate reduction process. The reactor effluent sulfate concentrations were 27.41 ± 0.44, 59.16 ± 1.08, 315.83 ± 7.33 mg/L for 250, 500 and 1000 mg/L of influent sulfate concentrations respectively, under the optimum operating conditions. The sulfate reduction rates matched well with low inlet sulfate loading rates, indicating stable performance of the bioreactor system. Overall, this study yielded very high sulfate reduction efficiency by the immobilized anaerobic biomass under high CO loading condition using the packed bed reactor system.
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Affiliation(s)
- Manoj Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Arindam Sinharoy
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Kannan Pakshirajan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
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Selvarajan R, Sibanda T, Venkatachalam S, Kamika I, Nel WAJ. Industrial wastewaters harbor a unique diversity of bacterial communities revealed by high-throughput amplicon analysis. ANN MICROBIOL 2018. [DOI: 10.1007/s13213-018-1349-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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20
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Ahmed W, Rodríguez J. Modelling sulfate reduction in anaerobic digestion: Complexity evaluation and parameter calibration. WATER RESEARCH 2018; 130:255-262. [PMID: 29241111 DOI: 10.1016/j.watres.2017.11.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 11/16/2017] [Accepted: 11/28/2017] [Indexed: 06/07/2023]
Abstract
A comparative analysis of five different structures of sulfate reduction (SR) models for anaerobic digestion (AD) was conducted to evaluate their accuracy to provide model developers and users with better information to decide on the optimum degree of complexity. The models evaluated differ in terms of the number/type of sulfate reducing bacterial activities considered based on the electron donors used. A systematic calibration of the evaluated models against a large set of experimental data was also conducted using a very recent parameter calibration method. Results indicate that a simple model incorporating both acetate utilizing and hydrogen utilizing sulfate reducing bacterial activities (the MAH model) achieves a good balance between performance and complexity in terms of prediction errors against experimental data. All the models evaluated provided acceptable predictions except the model including only hydrogen utilizing sulfate reducing bacterial activity. More complex model structures are recommended only if required in specific experimental cases.
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Affiliation(s)
- Wasim Ahmed
- Department of Chemical Engineering, Khalifa University of Science and Technology, Masdar Institute, PO Box: 54224, Abu Dhabi, United Arab Emirates
| | - Jorge Rodríguez
- Department of Chemical Engineering, Khalifa University of Science and Technology, Masdar Institute, PO Box: 54224, Abu Dhabi, United Arab Emirates.
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21
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Zhang L, Zhang Z, Sun R, Liang S, Chen GH, Jiang F. Self-accelerating sulfur reduction via polysulfide to realize a high-rate sulfidogenic reactor for wastewater treatment. WATER RESEARCH 2018; 130:161-167. [PMID: 29220716 DOI: 10.1016/j.watres.2017.11.062] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 11/27/2017] [Accepted: 11/28/2017] [Indexed: 05/25/2023]
Abstract
Sulfur reduction is a promising alternative to sulfate reduction as it can generate sulfide at a low cost for the precipitation of heavy metals or autotrophic denitrification in wastewater treatment. However, the extremely low water solubility of elemental sulfur limits its bioavailability and results in a low sulfur-reduction rate. Polysulfide, which is naturally generated through reactions between sulfur and sulfide, can enhance the bioavailability of sulfur and thus contribute to high-rate sulfur reduction. Based on this principle, a laboratory-scale sulfur-reducing bioreactor was designed in this study for wastewater treatment. After 164 days of operation, the sulfide production rate (SPR) in the bioreactor reached 126 mg S/L-h, which is significantly higher than those of other sulfate-reducing systems. Moreover, dissolved zero-valent sulfur (referred to as polysulfide) was detected in the sulfur-reducing reactor when the organics were completely depleted, indicating that polysulfide can form naturally and be readily reduced to sulfide in the bioreactor. We found that the produced sulfide promoted the formation of more polysulfide, which enabled a self-accelerating chain reaction of sulfur reduction via polysulfide. This stimulation effect was further validated by the 7-h batch tests. In the batch test without sulfide addition initially, a continuous increase in the hourly SPR was observed with increasing sulfide concentration. Furthermore, in the batch tests with the addition of 50-200 mg S/L sulfide at the beginning, the average SPR in the first 3 h increased with elevating initial sulfide concentration due to more polysulfide formation and reduction. However, high sulfide concentration (>250 mg S/L) hindered the continuous increase in SPR. Additionally, when polysulfide formation was prevented through the addition of Fe2+, the SPR dropped by 97.6% compared to that in the presence of polysulfide. This validates the key role of polysulfide in the high-rate sulfur reduction process. Overall, the findings suggest that high-rate sulfur reduction can be achieved for autotrophic denitrification or heavy-metal removal in wastewater treatment.
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Affiliation(s)
- Liang Zhang
- School of Chemistry & Environment, South China Normal University, Guangzhou, China; Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Zefeng Zhang
- School of Chemistry & Environment, South China Normal University, Guangzhou, China
| | - Rongrong Sun
- School of Chemistry & Environment, South China Normal University, Guangzhou, China
| | - Shuang Liang
- School of Chemistry & Environment, South China Normal University, Guangzhou, China
| | - Guang-Hao Chen
- Department of Civil & Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Feng Jiang
- School of Chemistry & Environment, South China Normal University, Guangzhou, China; Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou, China.
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