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He C, Zhang B, Yan W, Ding D, Guo J. Enhanced Microbial Chromate Reduction Using Hydrogen and Methane as Joint Electron Donors. JOURNAL OF HAZARDOUS MATERIALS 2020; 395:122684. [PMID: 32330782 DOI: 10.1016/j.jhazmat.2020.122684] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/19/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Hydrogen and methane commonly co-exist in aquifer. Either hydrogen or methane has been individually utilized as electron donor for bio-reducing chromate. However, little is known whether microbial chromate reduction would be suppressed or promoted when both hydrogen and methane are simultaneously supplied as joint electron donors. This study for the first time demonstrated microbial chromate reduction rate could be accelerated by both hydrogen and methane donating electrons. The maximum chromate reduction rate (4.70 ± 0.03 mg/L·d) with a volume ratio of hydrogen to methane at 1:1 was significantly higher than that with pure hydrogen (2.53 ± 0.02 mg/L·d) or pure methane (2.01 ± 0.02 mg/L·d) as the sole electron donor (p < 0.01). High-throughput 16S rRNA gene amplicon sequencing detected potential chromate reducers (e.g., Spirochaetaceae, Delftia and Azonexus) and hydrogenotrophic bacteria (e.g., Acetoanaerobium) and methane-metabolizing microorganisms (e.g., Methanobacterium), indicating that these microorganisms might play important roles on microbial chromate reduction using both hydrogen and methane as electron donors. Abundant hupL and mcrA genes responsible for hydrogen oxidation and methane conversion were harbored, together with chrA gene for chromate reduction. More abundant extracellular cytochrome c and intracellular NADH were detected with joint electron donors, suggesting more active electron transfers.
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Affiliation(s)
- Chao He
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Baogang Zhang
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China.
| | - Wenyue Yan
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Dahu Ding
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland, 4072, Australia
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Liu T, Li J, Khai Lim Z, Chen H, Hu S, Yuan Z, Guo J. Simultaneous Removal of Dissolved Methane and Nitrogen from Synthetic Mainstream Anaerobic Effluent. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:7629-7638. [PMID: 32432469 DOI: 10.1021/acs.est.0c00912] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Anaerobic technologies have been proposed as a promising solution to enhance bioenergy recovery and to transform a wastewater treatment plant (WWTP) from an energy consumer to an energy exporter. However, 20-60% of the methane produced remains dissolved in the anaerobically treated effluent, which is a potent greenhouse gas and is easily stripped out in the aeration tank. This study aims to develop a solution using dissolved methane to support denitrification, thus simultaneously enhancing nitrogen removal and achieving beneficial use of dissolved methane. By coupling anaerobic ammonium oxidation (anammox) with nitrite/nitrate-dependent anaerobic methane oxidation (n-DAMO), up to 85% of dissolved methane and more than 99% of nitrogen were removed in parallel in a biofilm system. Mass balance was conducted during both long-term operation and short-term batch tests, which indicated that n-DAMO bacteria and n-DAMO archaea indeed contributed jointly to the methane removal. The 16S rRNA gene amplicon sequencing further showed the co-presence of n-DAMO bacteria and n-DAMO archaea, while anammox bacteria were detected with a low relative abundance. This proposed technology can potentially be applied to reduce the carbon footprint and to save the organic carbon consumption in WWTPs.
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Affiliation(s)
- Tao Liu
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Jie Li
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Zhuan Khai Lim
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Hui Chen
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Shihu Hu
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
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53
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Rahimi S, Modin O, Mijakovic I. Technologies for biological removal and recovery of nitrogen from wastewater. Biotechnol Adv 2020; 43:107570. [PMID: 32531318 DOI: 10.1016/j.biotechadv.2020.107570] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 12/11/2022]
Abstract
Water contamination is a growing environmental issue. Several harmful effects on human health and the environment are attributed to nitrogen contamination of water sources. Consequently, many countries have strict regulations on nitrogen compound concentrations in wastewater effluents. Wastewater treatment is carried out using energy- and cost-intensive biological processes, which convert nitrogen compounds into innocuous dinitrogen gas. On the other hand, nitrogen is also an essential nutrient. Artificial fertilizers are produced by fixing dinitrogen gas from the atmosphere, in an energy-intensive chemical process. Ideally, we should be able to spend less energy and chemicals to remove nitrogen from wastewater and instead recover a fraction of it for use in fertilizers and similar applications. In this review, we present an overview of various technologies of biological nitrogen removal including nitrification, denitrification, anaerobic ammonium oxidation (anammox), as well as bioelectrochemical systems and microalgal growth for nitrogen recovery. We highlighted the nitrogen removal efficiency of these systems at different temperatures and operating conditions. The advantages, practical challenges, and potential for nitrogen recovery of different treatment methods are discussed.
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Affiliation(s)
- Shadi Rahimi
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden.
| | - Oskar Modin
- Division of Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Ivan Mijakovic
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden; The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Lyngby, Denmark.
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54
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Allegue T, Carballo-Costa MN, Fernandez-Gonzalez N, Garrido JM. Simultaneous nitrogen and dissolved methane removal from an upflow anaerobic sludge blanket reactor effluent using an integrated fixed-film activated sludge system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 263:110395. [PMID: 32883477 DOI: 10.1016/j.jenvman.2020.110395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 02/13/2020] [Accepted: 03/03/2020] [Indexed: 06/11/2023]
Abstract
One of the main drawbacks of upflow anaerobic sludge blanket (UASB) reactors that treat low-strength sewage at room temperature is related to the low quality of their effluents in terms of dissolved methane, organic matter, and nitrogen content. The present study aims to evaluate the feasibility of using an integrated fixed-film activated sludge (IFAS) system as an alternative post-treatment technology to mitigate the environmental impact of such effluents. For this purpose, a pilot plant composed of a UASB (120 L) followed by an IFAS (66 L) system was operated for 407 days. Special attention was paid to the suspended biomass retention capacity and the dissolved methane and nitrogen removal potential of the IFAS post-treatment system. Furthermore, the role of carriers on denitrification and nitrification processes and the microbial communities present in the biofilm were also analyzed. Average total chemical oxygen demand (CODT) and ammonium removal efficiencies of 92 ± 3% and around 57 ± 16% were attained throughout the entire operation, respectively. During a first period in which biomass was maintained in both biofilms and suspension, and nitrite was the main electron acceptor, maximum nitrogen removal and methane removal efficiencies of 32.5 mg TN L-1 and 93% were observed in the IFAS system, respectively. However, throughout the second period, in which suspended biomass was completely washed out from the IFAS system, and nitrate became the main electron acceptor, these values decreased to 18 ± 4 mg TN Lfeed-1 and 77 ± 12%, respectively. Surprisingly, throughout the entire operation, it was observed that around 50 and 41% of the total nitrogen and methane removals observed in the IFAS system, respectively, were carried out in the aerobic compartment. Aerobic methane oxidizers and anammox were detected with significant relative abundances in the biofilm carriers used in the anoxic and aerobic compartments using 16S rRNA gene amplicon sequencing analysis. Therefore, the use of an IFAS system could be suited to diminish greenhouse gas emissions and nutrients concentration for those sewage treatment plants that used UASB systems, especially in countries with temperate and warm climates.
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Affiliation(s)
- T Allegue
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Campus Vida, E-15782, Santiago de Compostela, Spain.
| | - M N Carballo-Costa
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Campus Vida, E-15782, Santiago de Compostela, Spain.
| | - N Fernandez-Gonzalez
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Campus Vida, E-15782, Santiago de Compostela, Spain.
| | - J M Garrido
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Campus Vida, E-15782, Santiago de Compostela, Spain.
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55
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Xu X, Zhu J, Thies JE, Wu W. Methanol-linked synergy between aerobic methanotrophs and denitrifiers enhanced nitrate removal efficiency in a membrane biofilm reactor under a low O 2:CH 4 ratio. WATER RESEARCH 2020; 174:115595. [PMID: 32097807 DOI: 10.1016/j.watres.2020.115595] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 01/20/2020] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
Nitrate removal efficiency of aerobic methane oxidation coupled with denitrification (AME-D) process was elevated by enhancing the methanol-linked synergy in a membrane biofilm reactor (MBfR) under a low O2:CH4 ratio. After 140 days' enrichment, the nitrate removal rate increased significantly from 3 to 4 mg-N L-1 d-1 to 22.09 ± 1.21 mg-N L-1 d-1 and the indicator, mol CH4 consumed/mol reduced NO3--N (C/N ratio), decreased to 1.79 which was very close to the theoretical minimum value (1.27-1.39). The increased nitrate removal efficiency was largely related to the enhanced relationship between aerobic methanotrophs and methanol-utilizing denitrifiers. Type I methanotrophs and some denitrifiers, especially those potential methanol-utilizing denitrifiers from Methylobacillus, Methylotenera, Methylophilus and Methyloversatilis, were abundant in the MBfR sludge. Aerobic methanotrophs and potential methanol-utilizing denitrifiers were closely associated in many globular aggregates (5-10 μm diameter) in the MBfR sludge, which may have promoted the denitrifiers to capture methanol released by methanotrophs efficiently. If we assume methanol is the only cross-feeding intermediate in the MBfR, about 38-60% of the CH4 supplied would be converted to methanol and secreted rather than continuing to be oxidized. At least 63% of this secreted methanol should be utilized for denitrification instead of being oxidized by oxygen in the MBfR. These findings suggest that the nitrate removal efficiency of the AME-D process could be significantly improved.
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Affiliation(s)
- Xingkun Xu
- Institute of Environmental Science and Technology, Zhejiang University, Hangzhou, 310058, China
| | - Jing Zhu
- Institute of Environmental Science and Technology, Zhejiang University, Hangzhou, 310058, China
| | - Janice E Thies
- Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
| | - Weixiang Wu
- Institute of Environmental Science and Technology, Zhejiang University, Hangzhou, 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety Technology, Zhejiang University, Hangzhou, 310058, China.
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56
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Bai YN, Wang XN, Zhang F, Wu J, Zhang W, Lu YZ, Fu L, Lau TC, Zeng RJ. High-rate anaerobic decolorization of methyl orange from synthetic azo dye wastewater in a methane-based hollow fiber membrane bioreactor. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:121753. [PMID: 31806438 DOI: 10.1016/j.jhazmat.2019.121753] [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: 10/22/2019] [Revised: 11/23/2019] [Accepted: 11/23/2019] [Indexed: 06/10/2023]
Abstract
Anaerobic biological techniques are widely used in the reductive decolorization of textile wastewater. However, the decolorization efficiency of textile wastewater by conventional anaerobic biological techniques is generally limited due to the low biomass retention capacity and short hydraulic retention time (HRT). In this study, a methane-based hollow fiber membrane bioreactor (HfMBR) was initially inoculated with an enriched anaerobic methane oxidation (AOM) culture to rapidly form an anaerobic biofilm. Then, synthetic azo dye wastewater containing methyl orange (MO) was fed into the HfMBR. MO decolorization efficiency of ∼ 100 % (HRT = 2 to 1.5 days) and maximum decolorization rate of 883 mg/L/day (HRT = 0.5 day) were obtained by the stepwise increase of the MO loading rate into the methane-based HfMBR. Scanning electron microscopy (SEM) and fluorescence in situ hybridization (FISH) analysis visually revealed that archaea clusters formed synergistic consortia with adjacent bacteria. Quantitative PCR (qPCR), phylogenetic and high-throughput sequencing analysis results further confirmed the biological consortia formation of methane-related archaea and partner bacteria, which played a synergistic role in MO decolorization. The high removal efficiency and stable microbial structure in HfMBR suggest it is a potentially effective technique for high-toxic azo dyes removal from textile wastewater.
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Affiliation(s)
- Ya-Nan Bai
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China; Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, PR China
| | - Xiu-Ning Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Fang Zhang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.
| | - Jun Wu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Wei Zhang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Yong-Ze Lu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Liang Fu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Tai-Chu Lau
- Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, PR China; State Key Laboratory in Marine Pollution, Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Raymond J Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China; Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, PR China; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, PR China.
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57
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Liu T, Guo J, Hu S, Yuan Z. Model-based investigation of membrane biofilm reactors coupling anammox with nitrite/nitrate-dependent anaerobic methane oxidation. ENVIRONMENT INTERNATIONAL 2020; 137:105501. [PMID: 32032775 DOI: 10.1016/j.envint.2020.105501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 01/13/2020] [Accepted: 01/16/2020] [Indexed: 05/28/2023]
Abstract
An innovative process coupling anaerobic ammonium oxidation (anammox) with nitrite/nitrate-dependent anaerobic methane oxidation (n-DAMO) in membrane biofilm reactors (MBfRs) has been developed to achieve high-level nitrogen removal from both sidestream (i.e., anaerobic digestion liquor) and mainstream (i.e., domestic strength) wastewater. In this study, a 1D biofilm model embedding the n-DAMO and anammox reactions was developed to facilitate further understanding of the process and its optimization. The model was calibrated and validated using comprehensive data sets from two independent MBfRs, treating sidestream- and mainstream-strength wastewater, respectively. Modelling results revealed a unique biofilm stratification. While anammox bacteria dominated throughout the biofilm, n-DAMO archaea (coupling nitrate reduction with anaerobic methane oxidation) only occurred at the inner layer and n-DAMO bacteria (coupling nitrite reduction with anaerobic methane oxidation) spread more evenly with a slightly higher fraction in the outer layer. The established MBfRs were robust against dynamic influent flowrates and nitrite/ammonium ratios. Thicker biofilms were beneficial for not only the total nitrogen (TN) removal but also the system robustness. Additionally, a positive correlation between the nitrogen removal efficiency and the residual methane emission was observed, as a result of higher methane partial pressure required. However, there was a threshold of methane partial pressure, above which the residual methane increased but nitrogen removal efficiency was stable. Meanwhile, thicker biofilms were also favorable to achieve less residual methane emission. Simulation results also suggested the feasibility of methane-based MBfRs to polish mainstream anammox effluent to meet a stringent N discharge standard (e.g., TN < 5 mg/L).
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Affiliation(s)
- Tao Liu
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Shihu Hu
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia.
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Chu YX, Ma RC, Wang J, Zhu JT, Kang YR, He R. Effects of oxygen tension on the microbial community and functional gene expression of aerobic methane oxidation coupled to denitrification systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:12280-12292. [PMID: 31993906 DOI: 10.1007/s11356-020-07767-8] [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: 09/26/2019] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
Aerobic CH4 oxidation coupled to denitrification (AME-D) can not only mitigate the emission of greenhouse gas (e.g., CH4) to the atmosphere, but also reduce NO3- and/or NO2- and alleviate nitrogen pollution. The effects of O2 tension on the community and functional gene expression of methanotrophs and denitrifiers were investigated in this study. Although higher CH4 oxidation occurred in the AME-D system with an initial O2 concentration of 21% (i.e., the O2-sufficient condition), more NO3--N was removed at the initial O2 concentration of 10% (i.e., the O2-limited environment). Type I methanotrophs, including Methylocaldum, Methylobacter, Methylococcus, Methylomonas, and Methylomicrobium, and type II methanotrophs, including Methylocystis and Methylosinus, dominated in the AME-D systems. Compared with type II methanotrophs, type I methanotrophs were more abundant in the AME-D systems. Proteobacteria and Actinobacteria were the main denitrifiers in the AME-D systems, and their compositions varied with the O2 tension. Quantitative PCR of the pmoA, nirS, and 16S rRNA genes showed that methanotrophs and denitrifiers were the main microorganisms in the AME-D systems, accounting for 46.4% and 24.1% in the O2-limited environment, respectively. However, the relative transcripts of the functional genes including pmoA, mmoX, nirK, nirS, and norZ were all less than 1%, especially the functional genes involved in denitrification under the O2-sufficient condition, likely due to the majority of the denitrifiers being dormant or even nonviable. These findings indicated that an optimal O2 concentration should be used to optimize the activity and functional gene expression of aerobic methanotrophs and denitrifiers in AME-D systems.
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Affiliation(s)
- Yi-Xuan Chu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Ruo-Chan Ma
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Jing Wang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Jia-Tian Zhu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Ya-Ru Kang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Ruo He
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
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59
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Wang W, Zhang RC, Huang ZQ, Chen C, Xu XJ, Zhou X, Yin TM, Wang AJ, Lee DJ, Ren NQ. Performance of a novel IAHD-DSR process with methane and sulfide as co-electron donors. JOURNAL OF HAZARDOUS MATERIALS 2020; 386:121657. [PMID: 31784129 DOI: 10.1016/j.jhazmat.2019.121657] [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: 09/02/2019] [Revised: 11/09/2019] [Accepted: 11/09/2019] [Indexed: 06/10/2023]
Abstract
A novel integrated autotrophic and heterotrophic denitrification- denitrifying sulfide removal (IAHD-DSR) process was established in this study for biogas desulfurization to simultaneously remove nitrogen in wastewater. The study demonstrated that the system could utilize methane and sulfide as co-electron donors to replace organic carbon source in IAHD process. Three batch tests (B1, B2 and B3) were set up with IAHD sludge to explore how the novel process works. According to mass balance in B2, methane oxidation and sulfide oxidation contributed 18.75 % and 71.25 % to nitrate removal, respectively; however, the contribution of methane oxidation to total nitrogen (TN) removal reached 84.36 %. Sulfide was mainly responsible for the reduction of nitrate to nitrite, while the methane was for nitrite to nitrogen gas in the presence of insufficient sulfide as electron donors. The TN removal in B2 was almost the same as in normal IAHD-DSR process B3-C. The functional genes mcrA and pmoA responsible for methane oxidation were detected in all three batches, with the abundance of 2.23 ×106 copies/(g dry soil) for mcrA in B1 being the highest in three batches. The sulfide addition in B2 increased the abundance of gene pmoA, indicating the enhancement of nitrite reduction coupled with methane oxidation.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China
| | - Ruo-Chen Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China
| | - Zi-Qing Huang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China.
| | - Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China
| | - Xu Zhou
- Engineering Laboratory of Microalgal Bioenergy, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Tian-Ming Yin
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, HeiLongjiang Province 150090, China.
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60
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Yang M, Wang X, Liu S, Wu C, Wang Q. Carbon release behaviour of polylactic acid/starch-based solid carbon and its influence on biodenitrification. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2019.107468] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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61
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Schroeder A, Souza DH, Fernandes M, Rodrigues EB, Trevisan V, Skoronski E. Application of glycerol as carbon source for continuous drinking water denitrification using microorganism from natural biomass. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 256:109964. [PMID: 31989983 DOI: 10.1016/j.jenvman.2019.109964] [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: 10/04/2019] [Revised: 12/04/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
The contamination of water resources by nitrate is a global problem. Indeed, traditional treatment technologies are not able to remove this ion from water. Alternatively, biological denitrification is a useful technique for natural water nitrate removal. This study aimed to evaluate the use of glycerol as a carbon source for drinking water nitrate removal via denitrification in a reactor using microorganisms from natural biomass. The experiment was carried out in a continuous fixed bed reactor using immobilised microorganisms from the vegetal Phyllostachys aurea. The tests were started in batch mode to provide cells growth and further immobilisation on the support. Then, the treatment experiments were accomplished in an up-flow continuous reactor. Ethanol was used as the primary carbon source, and it was gradually replaced by glycerol. The C:N (carbon to nitrogen) ratio and the hydraulic residence time (HRT) were evaluated. It was possible to remove 98.14% of nitrate using a C:N ratio and HRT of 3:1 and 1.51 days, respectively. The results have demonstrated that glycerol is a potential carbon source for denitrification in a continuous reactor using immobilised cells from natural biomass.
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Affiliation(s)
- Aline Schroeder
- Laboratory for Water and Waste Treatment, Environmental and Sanitary Engineering Department, Santa Catarina State University, Lages, Santa Catarina, 88520-000, Brazil
| | - Diego H Souza
- Laboratory for Water and Waste Treatment, Environmental and Sanitary Engineering Department, Santa Catarina State University, Lages, Santa Catarina, 88520-000, Brazil
| | - Mylena Fernandes
- Biological Engineering Integrated Laboratory, Chemical and Food Engineering Department, Federal University of Santa Catarina, Campus Universitário Trindade, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - Eduardo B Rodrigues
- Laboratory for Water and Waste Treatment, Environmental and Sanitary Engineering Department, Santa Catarina State University, Lages, Santa Catarina, 88520-000, Brazil
| | - Viviane Trevisan
- Laboratory for Water and Waste Treatment, Environmental and Sanitary Engineering Department, Santa Catarina State University, Lages, Santa Catarina, 88520-000, Brazil
| | - Everton Skoronski
- Laboratory for Water and Waste Treatment, Environmental and Sanitary Engineering Department, Santa Catarina State University, Lages, Santa Catarina, 88520-000, Brazil.
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Lee J, Alrashed W, Engel K, Yoo K, Neufeld JD, Lee HS. Methane-based denitrification kinetics and syntrophy in a membrane biofilm reactor at low methane pressure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 695:133818. [PMID: 31756873 DOI: 10.1016/j.scitotenv.2019.133818] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/02/2019] [Accepted: 08/06/2019] [Indexed: 06/10/2023]
Abstract
A methane-based membrane biofilm reactor (MBfR) was assessed for a tertiary nitrogen removal process in domestic wastewater treatment. To mitigate effluent dissolved methane concentrations, the MBfR was operated with a 20% methane mixing ratio and a low pressure of 0.003 atm. The nitrate concentration was reduced from 20 to 4 mg/L with a low methane concentration of 3.3 mg/L in the effluent at 4 h hydraulic retention time (HRT). An in situ dissolved oxygen sensor showed a concentration of 0.045 mg/L in the MBfR, demonstrating methane oxidation under hypoxic conditions. Both 16S rRNA gene sequencing and metagenomic analysis identified bacteria capable of oxidation of methane coupled to denitrification (Methylocystis), whereas other bacteria were implicated in either methane oxidation (Methylococcus) or nitrate reduction (Escherichia). Reduced genetic potential for nitrate reduction to nitrite at a shorter HRT coincided with a decreased efficiency of denitrification, suggesting rate limitation by this initial step of denitrification. Genes encoding nitrite reduction to dinitrogen were at similar relative abundance under both HRT conditions. Our results provide mechanistic evidence for microbial syntrophy between aerobic methanotrophs and denitrifiers in methane-fed MBfRs operated under varying HRTs, with important implications for novel biological nitrogen removal to dilute wastewater.
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Affiliation(s)
- Jangho Lee
- Department of Civil and Environmental Engineering, University of Waterloo 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
| | - Wael Alrashed
- Department of Civil and Environmental Engineering, University of Waterloo 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
| | - Katja Engel
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
| | - Keunje Yoo
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, United States.
| | - Josh D Neufeld
- Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
| | - Hyung-Sool Lee
- Department of Civil and Environmental Engineering, University of Waterloo 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada.
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63
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Chen H, Luo J, Liu S, Yuan Z, Guo J. Microbial Methane Conversion to Short-Chain Fatty Acids Using Various Electron Acceptors in Membrane Biofilm Reactors. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12846-12855. [PMID: 31593452 DOI: 10.1021/acs.est.8b06767] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Given our vast methane reserves and the forecasted shortage of crude oil in the not too distant future, the conversion of methane into value-added liquid chemicals or fuels would be beneficial. The generated chemicals or fuels could augment the petroleum-dominated chemical market, and also satisfy the increasing demand for transportation fuels. While methane bioconversion to liquid chemicals has just been reported recently, there is limited understanding of the process. This study aims to clarify the potential electron acceptors that could support the process. Here we operated four membrane biofilm reactors (MBfRs) fed with nitrate, nitrite, oxygen at a relatively low rate, and oxygen at a relatively high rate, respectively, to study if they can support methane bioconversion to short-chain fatty acids (SCFAs) and the associated microbiological features. All tested electron acceptors facilitated methane bioconversion to SCFAs (ranging from 1.1 to 36.7 mg acetate L-1 d-1, or 3.4 to 114.6 mg acetate d-1 m-2 of biofilm). The carbon efficiency was estimated to be 7.9 ± 1.4% to 148.5 ± 1.3%, with an efficiency higher than 100%, suggesting the assimilation of other carbon, very likely CO2, into the products. A low oxygen supply rate of 46.4 ± 2.3 mg O2 d-1 m-2 was found to be the most favorable among all the electron conditions provided according to the SCFAs production rate and also the carbon utilization efficiency. Microbial characterization revealed that completely different communities evolved in the respective reactors, suggesting diverse microbial pathways exist for methane bioconversion into value-added chemicals.
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Affiliation(s)
- Hui Chen
- Advanced Water Management Centre , The University of Queensland , St Lucia , Queensland 4072 , Australia
| | - Jinghuan Luo
- Advanced Water Management Centre , The University of Queensland , St Lucia , Queensland 4072 , Australia
| | - Shuai Liu
- Advanced Water Management Centre , The University of Queensland , St Lucia , Queensland 4072 , Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre , The University of Queensland , St Lucia , Queensland 4072 , Australia
| | - Jianhua Guo
- Advanced Water Management Centre , The University of Queensland , St Lucia , Queensland 4072 , Australia
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64
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Wu Z, Song Y, Shen H, Jiang X, Li B, Xiong Z. Biochar can mitigate methane emissions by improving methanotrophs for prolonged period in fertilized paddy soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 253:1038-1046. [PMID: 31434181 DOI: 10.1016/j.envpol.2019.07.073] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/29/2019] [Accepted: 07/14/2019] [Indexed: 05/18/2023]
Abstract
Biochar application to fertilized paddy soils has been recommended as an effective countermeasure to mitigate methane (CH4) emissions, but its mechanism and effective duration has not yet been adequately elucidated. A laboratory incubation experiment was performed to gain insight into the combined effects of fresh and six-year aged biochar on potential methane oxidation (PMO) in paddy soils with ammonium or nitrate-amendment. Results showed that both ammonium and nitrate were essential for CH4 oxidation though high ammonium (4 mM) inhibited PMO as compared to low ammonium (1 mM and 2 mM), and that nitrate was better in promoting PMO than ammonium. Moreover, ammonium-amendment promoted type I pmoA, and nitrate-amendment enhanced type II pmoA abundance. Both fresh and aged biochar increased PMO as well as nitrification by enhancing the total, type I and type II methanotrophs as compared to the control. Increased soil PMO with mineral N input in both six-year aged biochar and fresh biochar amendment, indicating that biochar mitigated CH4 by promoting PMO for prolonged period in fertilized paddy soils.
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Affiliation(s)
- Zhen Wu
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yanfeng Song
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Haojie Shen
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xueyang Jiang
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Bo Li
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Zhengqin Xiong
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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65
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Dong QY, Wang Z, Shi LD, Lai CY, Zhao HP. Anaerobic methane oxidation coupled to chromate reduction in a methane-based membrane biofilm batch reactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:26286-26292. [PMID: 31286367 DOI: 10.1007/s11356-019-05709-7] [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: 12/14/2018] [Accepted: 06/06/2019] [Indexed: 06/09/2023]
Abstract
Chromate can be reduced by methanotrophs in a membrane biofilm reactor (MBfR). In this study, we cultivated a Cr(VI)-reducing biofilm in a methane (CH4)-based membrane biofilm batch reactor (MBBR) under anaerobic conditions. The Cr(VI) reduction rate increased to 0.28 mg/L day when the chromate concentration was ≤ 2.2 mg/L but declined sharply to 0.01 mg/L day when the Cr(VI) concentration increased to 6 mg/L. Isotope tracing experiments showed that part of the 13C-labeled CH4 was transformed to 13CO2, suggesting that the biofilm may reduce Cr(VI) by anaerobic methane oxidation (AnMO). Microbial community analysis showed that a methanogen, i.e., Methanobacterium, dominated in the biofilm, suggesting that this genus is probably capable of carrying out AnMO. The abundance of Methylomonas, an aerobic methanotroph, decreased significantly, while Meiothermus, a potential chromate-reducing bacterium, was enriched in the biofilm. Overall, the results showed that the anaerobic environment inhibited the activity of aerobic methanotrophs while promoting AnMO bacterial enrichment, and high Cr(VI) loading reduced Cr(VI) flux by inhibiting the methane oxidation process.
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Affiliation(s)
- Qiu-Yi Dong
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhen Wang
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China
| | - Ling-Dong Shi
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
- Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chun-Yu Lai
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
- Advanced Water Management Centre, The University of Queensland, St. Lucia, 4072, Queensland, Australia.
| | - He-Ping Zhao
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
- Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China.
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66
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Luo JH, Wu M, Liu J, Qian G, Yuan Z, Guo J. Microbial chromate reduction coupled with anaerobic oxidation of methane in a membrane biofilm reactor. ENVIRONMENT INTERNATIONAL 2019; 130:104926. [PMID: 31228790 DOI: 10.1016/j.envint.2019.104926] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/02/2019] [Accepted: 06/12/2019] [Indexed: 06/09/2023]
Abstract
It has been reported that microbial reduction of sulfate, nitrite/nitrate and iron/manganese could be coupled with anaerobic oxidation of methane (AOM), which plays a significant role in controlling methane emission from anoxic niches. However, little is known about microbial chromate (Cr(VI)) reduction coupling with AOM. In this study, a microbial consortium was enriched via switching nitrate dosing to chromate feeding as the sole electron acceptor under anaerobic condition in a membrane biofilm reactor (MBfR), in which methane was continuously provided as the electron donor through bubble-less hollow fiber membranes. According to long-term reactor operation and chromium speciation analysis, soluble chromate could be reduced into Cr(III) compounds by using methane as electron donor. Fluorescence in situ hybridization and high-throughput 16S rRNA gene amplicon profiling further indicated that after feeding chromate Candidatus 'Methanoperedens' (a known nitrate-dependent anaerobic methane oxidation archaeon) became sole anaerobic methanotroph in the biofilm, potentially responsible for the chromate bio-reduction driven by methane. Two potential pathways of the microbial AOM-coupled chromate reduction were proposed: (i) Candidatus 'Methanoperedens' independently utilizes chromate as electron acceptor to form Cr(III) compounds, or (ii) Candidatus 'Methanoperedens' oxidizes methane to generate intermediates or electrons, which will be utilized to reduce chromate to Cr(III) compounds by unknown chromate reducers synergistically. Our findings suggest a possible link between the biogeochemical chromium and methane cycles.
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Affiliation(s)
- Jing-Huan Luo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia; School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, PR China
| | - Mengxiong Wu
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jianyong Liu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, PR China
| | - Guangren Qian
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, PR China
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia.
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67
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Li C, Li J, Liu G, Deng Y, Zhu S, Ye Z, Shao Y, Liu D. Performance and microbial community analysis of Combined Denitrification and Biofloc Technology (CDBFT) system treating nitrogen-rich aquaculture wastewater. BIORESOURCE TECHNOLOGY 2019; 288:121582. [PMID: 31176936 DOI: 10.1016/j.biortech.2019.121582] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
This study proposed two novel Combined Denitrification and Biofloc Technology (CDBFT) systems (one under blue LED light (L1) and the other without light (C1), each containing a denitrification (DE) reactor and a biofloc-based reactor) for the enhanced total nitrogen (TN) removal. Long-term operation (110 days) suggested that simultaneous nitrification and denitrification was achieved in both C1 and L1. Significantly higher total nitrogen removal efficiency (TNRE) was observed in L1-CDBFT (92.2%) than C1-CDBFT (87.5%, P < 0.05; after day 14). Further 24-hour nitrogen transformation test showed the boosted nitrate removal of L1-BFT than C1-BFT. High-throughput sequencing analysis revealed that phyla Rotifera and Nematoda which were indispensable for aquatic animal larviculture, were only found in L1-BFT. Nevertheless, CDBFT effluent from both systems was suitable for tilapia culture based on water quality, biofloc characteristics and tilapia survival rates. Overall, this study highlights the significance of developing CDBFT for TN removal especially under lights.
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Affiliation(s)
- Changwei Li
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Jiawei Li
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Gang Liu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yale Deng
- Aquaculture and Fisheries Group, Department of Animal Sciences, Wageningen University, 6708 WD Wageningen, The Netherlands
| | - Songming Zhu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Zhangying Ye
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yufang Shao
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Dezhao Liu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
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68
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Methane oxidation coupled to vanadate reduction in a membrane biofilm batch reactor under hypoxic condition. Biodegradation 2019; 30:457-466. [PMID: 31410606 DOI: 10.1007/s10532-019-09887-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 07/25/2019] [Indexed: 10/26/2022]
Abstract
This study shows vanadate (V(V)) reduction in a methane (CH4) based membrane biofilm batch reactor when the concentration of dissolved oxygen (O2) was extremely low. V(IV) was the dominant products formed from V(V) bio-reduction, and majority of produced V(IV) transformed into precipitates with green color. Quantitative polymerase chain reaction and Illumina sequencing analysis showed that archaea methanosarcina were significantly enriched. Metagenomic predictive analysis further showed the enrichment of genes associated with reverse methanogenesis pathway, the key CH4-activating mechanism for anaerobic methane oxidation (AnMO), as well as the enrichment of genes related to acetate synthesis, in archaea. The enrichment of aerobic methanotrophs Methylococcus and Methylomonas implied their role in CH4 activation using trace level of O2, or their participation in V(V) reduction.
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69
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Cao S, Sun F, Lu D, Zhou Y. Characterization of the refractory dissolved organic matters (rDOM) in sludge alkaline fermentation liquid driven denitrification: Effect of HRT on their fate and transformation. WATER RESEARCH 2019; 159:135-144. [PMID: 31085388 DOI: 10.1016/j.watres.2019.04.063] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/14/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Enhanced biological denitrification for nitrogen removal using sludge alkaline fermentation liquid (SAFL) as an alternative carbon source has been widely reported in previous studies, while limited studies focused on the degradation of the organics presented in SAFL. In this study, an SAFL driven anoxic denitrification sequencing batch reactor (SBR) was established, the mechanism of organics utilization was characterized and the refractory dissolved organic matters (rDOM) was identified. Denitrification could rapidly proceed with the presence of volatile fatty acids (VFAs) initially, while the denitrification rate largely decreased after the VFAs depleted. A great deal of rDOM, which was hard to be utilized by denitrifying microorganism, was found in the effluent. A prolonged hydraulic retention time (HRT) led to the further transformation of particles and colloids to smaller colloids and soluble organics. Extended HRT promoted the degradation of soluble microbial by-product (SMP), but had minor effect on the removal of humic-like, and fulvic acid-like substances. The characterization of the effluent demonstrated the building blocks, were dominated in the rDOM (43.79%-48.78%), followed by high molecular weight protein (HMW-PN) (13.37%-17.39%), HMW polysaccharide (HMW-PS) (12.84%-15.9%), low molecular weight (LMW) neutrals (11.28%-13.65%), and hydrophobic dissolved organic carbon (HO-DOC) (8.0%-12.62%). Moreover, it was found that the building blocks were relatively easy to be degraded with the extension of HRTs, followed by LMW-PS, LMW-PN, LMW neutrals, HMW-PN, and HMW-PS. However, further extended HRT >24 h could not improve the removal of building blocks, LMW-PS and LMW neutrals. This study, for the first time, provided insights into the transformation of organic matters produced by SAFL in a denitrification system and acted as a guide for the subsequent advanced treatment.
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Affiliation(s)
- Shenbin Cao
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Faqian Sun
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore; College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Dan Lu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yan Zhou
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
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70
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Alvarino T, Allegue T, Fernandez-Gonzalez N, Suarez S, Lema JM, Garrido JM, Omil F. Minimization of dissolved methane, nitrogen and organic micropollutants emissions of effluents from a methanogenic reactor by using a preanoxic MBR post-treatment system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 671:165-174. [PMID: 30928746 DOI: 10.1016/j.scitotenv.2019.03.169] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/27/2019] [Accepted: 03/12/2019] [Indexed: 06/09/2023]
Abstract
The use of a hybrid membrane bioreactor (MBR) post-treatment system is proposed as a cost-efficient technology in order to minimize the environmental impact of anaerobic effluents, treating low-strength sewage at room temperature, such as their high nitrogen content and the presence of dissolved methane. In this research, nitrite was externally added at different concentrations into the anoxic compartment, providing an extra electron acceptor besides the existing nitrate, to evaluate its effect on denitrification, methane oxidation and OMPs removal processes. The nitrite addition significantly improved the denitrification potential of the system, achieving nitrogen removals up to 35 mg TN L-1. Moreover, higher nitrite concentrations clearly promoted an increase in the removal of some organic micropollutants (OMPs) such as diclofenac (DCF), ethinylestradiol (EE2), triclosan (TCS) and ibuprofen (IBP). Nevertheless, methane removal efficiencies or rates were not affected by this fact. Finally, COD and ammonium removals higher than 99 and 91% were observed during the entire operation, respectively. Based on the results, a future strategy in which ammonium is partially oxidized to nitrite could result in better nitrogen and OMPs removals for the proposed technology.
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Affiliation(s)
- T Alvarino
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - T Allegue
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - N Fernandez-Gonzalez
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - S Suarez
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - J M Lema
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - J M Garrido
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - F Omil
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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71
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Bai YN, Wang XN, Lu YZ, Fu L, Zhang F, Lau TC, Zeng RJ. Microbial selenite reduction coupled to anaerobic oxidation of methane. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 669:168-174. [PMID: 30878925 DOI: 10.1016/j.scitotenv.2019.03.119] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/08/2019] [Accepted: 03/08/2019] [Indexed: 06/09/2023]
Abstract
Denitrifying anaerobic methane oxidation (DAMO) is the process of coupling the anaerobic oxidation of methane (AOM) with denitrification, which plays an important part in controlling the flow of methane in anoxic niches. In this study, we explored the feasibility of microbial selenite reduction using methane by DAMO culture. Isotopic 13CH4 and long-term experiments showed that selenite reduction was coupled to methane oxidation, and selenite was ultimately reduced to Se (0) by the analyses of scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The introduction of nitrate, the original electron acceptor in the DAMO culture, inhibited selenite reduction. Meanwhile, the microbial community of DAMO culture was significantly changed when the electron acceptor was changed from nitrate to selenite after long-term selenite reduction. High-throughput 16S rRNA gene sequencing indicated that Methylococcus (26%) became the predominant microbe performing selenite reduction and methane oxidation and the possible pathways of AOM accompanied with selenite reduction were proposed. This study revealed more potential relation during the biogeochemical cycle of carbon, nitrogen, and selenium.
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Affiliation(s)
- Ya-Nan Bai
- Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, PR China; School of Life Sciences, University of Science and Technology of China, Hefei 230026, PR China
| | - Xiu-Ning Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Yong-Ze Lu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Ling Fu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China
| | - Fang Zhang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.
| | - Tai-Chu Lau
- Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, PR China; State Key Laboratory in Marine Pollution, Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong
| | - Raymond J Zeng
- Advanced Laboratory for Environmental Research and Technology, USTC-CityU, Suzhou, PR China; School of Life Sciences, University of Science and Technology of China, Hefei 230026, PR China; Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.
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72
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Barba C, Folch A, Sanchez-Vila X, Martínez-Alonso M, Gaju N. Are dominant microbial sub-surface communities affected by water quality and soil characteristics? JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 237:332-343. [PMID: 30818236 DOI: 10.1016/j.jenvman.2019.02.079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 02/14/2019] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
Subsurface microorganisms must deal with quite extreme environmental conditions. The lack of light, oxygen, and potentially nutrients are the main environmental stresses faced by subsurface microbial communities. Likewise, environmental disruptions providing an unbalanced positive input of nutrients force microorganisms to adapt to varying conditions, visible in the changes in microbial community diversity. In order to test microbial community adaptation to environmental changes, we performed a study in a surface Managed Aquifer Recharge facility, consisting of a settlement basin (two-day residence time) and an infiltration pond. Data on groundwater hydrochemistry, soil texture, and microbial characterization was compiled from surface water, groundwater, and soil samples at two distinct recharge operation conditions. Multivariate statistics by means of Principal Component Analysis (PCA) was the technique used to map the relevant dimensionality reduced combinations of input variables that properly describe the system behavior. The methodology selected allows including variables of different nature and displaying very different range values. Strong differences in the microbial assemblage under recharge conditions were found, coupled to hydrochemistry and grain-size distribution variables. Also, some microbial groups displayed correlations with either carbon or nitrogen cycles, especially showing abundant populations of denitrifying bacteria in groundwater. A significant correlation was found between Methylotenera mobilis and the concentrations of NO3 and SO4, and also between Vogesella indigofera and the presence of DOC in the infiltrating water. Also, microbial communities present at the bottom of the pond correlated with representative descriptors of soil grain size distribution.
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Affiliation(s)
- Carme Barba
- Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), C/Jordi Girona 1-3, 08034, Barcelona, Spain; Associated Unit: Hydrogeology Group (UPC-CSIC), Spain.
| | - Albert Folch
- Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), C/Jordi Girona 1-3, 08034, Barcelona, Spain; Associated Unit: Hydrogeology Group (UPC-CSIC), Spain.
| | - Xavier Sanchez-Vila
- Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), C/Jordi Girona 1-3, 08034, Barcelona, Spain; Associated Unit: Hydrogeology Group (UPC-CSIC), Spain.
| | - Maira Martínez-Alonso
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), 08193, Bellaterra, Spain.
| | - Núria Gaju
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), 08193, Bellaterra, Spain.
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73
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Show PL, Pal P, Leong HY, Juan JC, Ling TC. A review on the advanced leachate treatment technologies and their performance comparison: an opportunity to keep the environment safe. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:227. [PMID: 30887225 DOI: 10.1007/s10661-019-7380-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
Landfill application is the most common approach for biowaste treatment via leachate treatment system. When municipal solid waste deposited in the landfills, microbial decomposition breaks down the wastes generating the end products, such as carbon dioxide, methane, volatile organic compounds, and liquid leachate. However, due to the landfill age, the fluctuation in the characteristics of landfill leachate is foreseen in the leachate treatment plant. The focuses of the researchers are keeping leachate from contaminating groundwater besides keeping potent methane emissions from reaching the atmosphere. To address the above issues, scientists are required to adopt green biological methods to keep the environment safe. This review focuses on the assorting of research papers on organic content and nitrogen removal from the leachate via recent effective biological technologies instead of conventional nitrification and denitrification process. The published researches on the characteristics of various Malaysian landfill sites were also discussed. The understanding of the mechanism behind the nitrification and denitrification process will help to select an optimized and effective biological treatment option in treating the leachate waste. Recently, widely studied technologies for the biological treatment process are aerobic methane oxidation coupled to denitrification (AME-D) and partial nitritation-anammox (PN/A) process, and both were discussed in this review article. This paper gives the idea of the modification of the conventional treatment technologies, such as combining the present processes to make the treatment process more effective. With the integration of biological process in the leachate treatment, the effluent discharge could be treated in shortcut and novel pathways, and it can lead to achieving "3Rs" of reduce, reuse, and recycle approach.
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Affiliation(s)
- Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia.
- Bioseparation Research Group, Faculty of Science and Engineering, Centre for Food and Bioproduct Processing, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia.
| | - Preeti Pal
- School of Environmental Science and Engineering, Indian Institute of Technology, Kharagpur, West Bengal, 721302, India
| | - Hui Yi Leong
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
| | - Joon Ching Juan
- Nanotechnology and Catalysis Research Centre (NANOCAT), University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Methane utilization in aerobic methane oxidation coupled to denitrification (AME-D): theoretical estimation and effect of hydraulic retention time (HRT). Biodegradation 2019; 30:101-112. [DOI: 10.1007/s10532-019-09869-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 02/01/2019] [Indexed: 10/27/2022]
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75
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Cao Q, Liu X, Ran Y, Li Z, Li D. Methane oxidation coupled to denitrification under microaerobic and hypoxic conditions in leach bed bioreactors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 649:1-11. [PMID: 30153511 DOI: 10.1016/j.scitotenv.2018.08.289] [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: 07/09/2018] [Revised: 08/21/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
Managing nitrogen and carbon cycles in landfills is an environmental challenge. In this study, our purpose was to test two types of methane oxidation processes coupled to denitrification inside landfills: microaerobic and hypoxic methane oxidation coupled to denitrification (MAME-D and HYME-D). Leach bed bioreactors were designed and operated for >100 d with NO3--N concentration ranging from 100 to 400 mg N/L. During six runs of the leach bed bioreactor experiment, leach bed bioreactor 2 (MAME-D) reached 100% denitrification efficiency and the highest average specific denitrification rate of 20.36 mg N/(L·d) in run 5, while leach bed bioreactor 3 (HYME-D) achieved 75% denitrification efficiency and the highest average specific denitrification rate of 8.09 mg N/(L·d) in run 6. Subsequently, waste from leach bed bioreactors 1, 2, and 3 was inoculated into anaerobic bottles to run a batch experiment for 13 d. The total consumed methane, oxygen, and nitrate amounts in the microaerobic system with no methane and oxygen supplement were 2.33, 2.38, and 2.04 mmol, respectively, which almost matched the theoretical equation of aerobic methane oxidation coupled to denitrification. In the hypoxic system, the total consumed methane and nitrate amounts were 0.23 and 0.41 mmol, respectively, the ratio of which closely matched the HYME-D. In addition, via the diverse functional community analysis, methane oxidation in the microaerobic system was confirmed to be conducted by methanotrophs (i.e., Methylobacter and Methylomonas) using oxygen as an electron acceptor. Subsequently, the generated organic compounds could support denitrifiers (i.e., Methylophilaceae) to complete denitrification. In the hypoxic system, Methylomonas and Methylobacter utilized nitrate as a direct electron acceptor to oxidize methane. The two landfill processes characterized here will expand our understanding of the environmental role of methanotrophs and methylotrophs in both carbon and nitrogen cycles.
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Affiliation(s)
- Qin Cao
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Xiaofeng Liu
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Yi Ran
- Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture, PR China
| | - Zhidong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Dong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
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76
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Cheng C, Shen X, Xie H, Hu Z, Pavlostathis SG, Zhang J. Coupled methane and nitrous oxide biotransformation in freshwater wetland sediment microcosms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 648:916-922. [PMID: 30144759 DOI: 10.1016/j.scitotenv.2018.08.185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/24/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Anaerobic oxidation of methane (AOM) coupled to denitrification is becoming the focus of scientific inquiry due to its potential contribution to global carbon and nitrogen cycles. AOM has been previously reported to proceed with nitrate (NO3-) or nitrite (NO2-). However, little research has been conducted on the simultaneous use of methane (CH4) and nitrous oxide (N2O). Here, coupled CH4 and N2O biotransformation in a freshwater wetland sediment was obtained in a 7-day anaerobic sediment incubation assay. The significant CO2 accumulation and decrease of CH4 emission in sediment microcosms was attributed to two mechanisms: inhibition of methanogenesis and N2O-dependent AOM. To further confirm the coupled CH4 and N2O transformation, a 13C-labelled stable isotope tracer assay after anaerobic incubation was conducted with N2O and/or CH4 amendments. The N2O-dependent AOM rate was 3.41 ± 0.13 nmol CO2 g-1 dry sediment·day-1. According to metagenomic analysis, addition of N2O stimulated AOM by increasing the activity and abundance of methanotrophic bacteria and by increasing enzymatic activities in the electron transport chain. Based on these results, we propose coupled CH4 and N2O biotransformation in the sediment microcosms for the first time, carried out by unidentified methanotroph(s) via intra‑oxygen produced in the presence of N2O. Such a process has the potential to reduce the emission of two highly potent greenhouse gases and makes a significant contribution to the link of global carbon and nitrogen cycles in anoxic environments.
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Affiliation(s)
- Cheng Cheng
- School of Environmental Science and Engineering, Shandong University, Jinan 250100, China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Xuanxu Shen
- School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Huijun Xie
- Environmental Research Institute, Shandong University, Jinan 250100, China
| | - Zhen Hu
- School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Spyros G Pavlostathis
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Jian Zhang
- School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
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Bai H, Liao S, Wang A, Huang J, Shu W, Ye J. High-efficiency inorganic nitrogen removal by newly isolated Pannonibacter phragmitetus B1. BIORESOURCE TECHNOLOGY 2019; 271:91-99. [PMID: 30265957 DOI: 10.1016/j.biortech.2018.09.090] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 09/08/2018] [Accepted: 09/16/2018] [Indexed: 06/08/2023]
Abstract
An aerobic heterotrophic nitrogen removal bacterium strain, B1, was isolated from aquaculture water and identified as Pannonibacter phragmitetus (99% similarity) by 16S rRNA sequencing analysis. When ammonium, nitrite or nitrate was the sole nitrogen source, with an initial nitrogen concentration of 14 mg/L, the nitrogen removal efficiencies were 98.66%, 99.96% and 98.73%, respectively, and the corresponding maximum removal rates reached as high as 1.16, 0.77 and 0.81 mg/L/h, respectively. In the presence of NH4+-N, the removal efficiency of 56 mg/L NO2--N within 27 h increased by 83.50%, and the corresponding removal rate reached as high as 1.72 mg/L/h. Additionally, different carbon sources (dl-malic acid, sucrose, sodium citrate, and glucose) could be utilized in nitrogen removal. Sequence amplification indicates that the denitrification genes nirK, norB and narG are present in strain B1. All results demonstrate that strain B1 has high promise for future applications of removing inorganic nitrogen from wastewater.
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Affiliation(s)
- Hong Bai
- College of Life Science, South China Normal University, Guangzhou 510631, China; Key Laboratory of Ecology and Environmental Science of Guangdong Higher Education, Guangzhou 510631, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou 510631, China
| | - Shaoan Liao
- College of Life Science, South China Normal University, Guangzhou 510631, China; Key Laboratory of Ecology and Environmental Science of Guangdong Higher Education, Guangzhou 510631, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou 510631, China.
| | - Anli Wang
- College of Life Science, South China Normal University, Guangzhou 510631, China; Key Laboratory of Ecology and Environmental Science of Guangdong Higher Education, Guangzhou 510631, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou 510631, China
| | - Jiahui Huang
- College of Life Science, South China Normal University, Guangzhou 510631, China; Key Laboratory of Ecology and Environmental Science of Guangdong Higher Education, Guangzhou 510631, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou 510631, China
| | - Wen Shu
- College of Life Science, South China Normal University, Guangzhou 510631, China; Key Laboratory of Ecology and Environmental Science of Guangdong Higher Education, Guangzhou 510631, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou 510631, China
| | - Jianmin Ye
- College of Life Science, South China Normal University, Guangzhou 510631, China; Key Laboratory of Ecology and Environmental Science of Guangdong Higher Education, Guangzhou 510631, China; Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, Guangzhou 510631, China
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78
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Lai CY, Dong QY, Zhao HP. Oxygen exposure deprives antimonate-reducing capability of a methane fed biofilm. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 644:1152-1159. [PMID: 30743828 DOI: 10.1016/j.scitotenv.2018.07.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 07/03/2018] [Accepted: 07/03/2018] [Indexed: 06/09/2023]
Abstract
This work is aiming at achieving antimonate (Sb(V)) bio-reduction in a methane (CH4) based membrane biofilm reactor (MBfR), and elucidating the effect of oxygen (O2) on the performance of the biofilm. Scanning electron microscope (SEM), energy dispersive X-ray (EDS) and X-ray photoelectron spectroscopy (XPS) confirm Sb2O3 precipitates were the main product formed from Sb(V) reduction in the CH4-fed biofilm. Illumina sequencing shows Thermomonas may be responsible for Sb(V) reduction. Moreover, we found 8 mg/L of O2 in the influent irreversibly inhibited Sb(V) reduction. Metagenomic prediction by Reconstruction of Unobserved State (PICRUSt) shows that the biofilm lacked efficient defense system to the oxidative stress, leading to the great suppress of key biological metabolisms such as TCA cycle, glycolysis and DNA replication, as well as potential Sb(V) reductases, by O2. However, methanotrophs Methylomonas and Methylosinus were enriched in the biofilm with O2 intrusion, in accordance with the enhanced abundance of genes encoding aerobic CH4 oxidation. These insights evoke the theoretical guidance of microbial remediation using CH4 as the electron donor towards Sb(V) contamination, and will give us a strong reference with regard to wastewater disposal.
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Affiliation(s)
- Chun-Yu Lai
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China; Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Qiu-Yi Dong
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China
| | - He-Ping Zhao
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, China; Zhejiang Prov Key Lab Water Pollut Control & Envi, Zhejiang University, Hangzhou, Zhejiang, China; MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China.
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79
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Chen HY, Ng KK, Lee CH, Chen TY, Hong PKA, Yang PY, Lin CF. Entrapped biomass for removal of organics and total nitrogen from anaerobic reactor effluents. BIORESOURCE TECHNOLOGY 2018; 267:642-649. [PMID: 30059944 DOI: 10.1016/j.biortech.2018.07.091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 07/16/2018] [Accepted: 07/18/2018] [Indexed: 06/08/2023]
Abstract
Anaerobic processes have been applied to treat low-strength domestic wastewaters with significant energy saving. However, anaerobic process effluents must be further removed of residual organics and total nitrogen before discharge. Reported here are an aerobic entrapped bio-technology (EBT) system and an EBT coupled with activated sludge (EBT + AS) system being tested as a post-anaerobic treatment. Both systems have been operated under aerobic condition to provide organics and total nitrogen removal, achieving COD removal by 74-88% and TN removal by 58-65% at hydraulic retention times of 8-24 h. ΔCOD/ΔNO3 ratios that represent the carbon usage efficiency as electron donors for denitrification were 1.82-1.93 in the EBT and 2.01-2.02 in the EBT + AS systems, with both ratios being lower (i.e. more efficient) than 6 typically required in traditional activated sludge bioreactors. Both systems demonstrate promise for polishing removal of COD and TN.
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Affiliation(s)
- Haon-Yao Chen
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Kok Kwang Ng
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Chien-Hsien Lee
- Department of Infrastructures Construction, Chiayi City, Taiwan
| | - Tzu-Yang Chen
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Pui-Kwan Andy Hong
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Ping-Yi Yang
- Department of Molecular Biosciences & Bioengineering, University of Hawaii Manoa, Honolulu, HI 96822, USA
| | - Cheng-Fang Lin
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan.
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80
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Cai C, Hu S, Chen X, Ni BJ, Pu J, Yuan Z. Effect of methane partial pressure on the performance of a membrane biofilm reactor coupling methane-dependent denitrification and anammox. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 639:278-285. [PMID: 29791881 DOI: 10.1016/j.scitotenv.2018.05.164] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/15/2018] [Accepted: 05/13/2018] [Indexed: 06/08/2023]
Abstract
Complete nitrogen removal has recently been demonstrated by integrating anaerobic ammonium oxidation (anammox) and denitrifying anaerobic methane oxidation (DAMO) processes. In this work, the effect of methane partial pressure on the performance of a membrane biofilm reactor (MBfR) consisting of DAMO and anammox microorganisms was evaluated. The activities of DAMO archaea and DAMO bacteria in the biofilm increased significantly with increased methane partial pressure, from 367 ± 9 and 58 ± 22 mg-N L-1d-1 to 580 ± 12 and 222 ± 22 mg-N L-1d-1, respectively, while the activity of anammox bacteria only increased slightly, when the methane partial pressure was elevated from 0.24 to 1.39 atm in the short-term batch tests. The results were supported by a long-term (seven weeks) continuous test, when the methane partial pressure was dropped from 1.39 to 0.78 atm. The methane utilization efficiency was always above 96% during both short-term and long-term tests. Taken together, nitrogen removal rate (especially the nitrate reduction rate by DAMO archaea) and methane utilization efficiency could be maintained at high levels in a broad range of methane partial pressure (0.24-1.39 atm in this study). In addition, a previously established DAMO/anammox biofilm model was used to analyze the experimental data. The observed impacts of methane partial pressure on biofilm activity were well explained by the modeling results. These results suggest that methane partial pressure can potentially be used as a manipulated variable to control reaction rates, ultimately to maintain high nitrogen removal efficiency, according to nitrogen loading rate.
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Affiliation(s)
- Chen Cai
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Shihu Hu
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Xueming Chen
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Bing-Jie Ni
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Jiaoyang Pu
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
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81
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Pfluger AR, Callahan JL, Stokes-Draut J, Ramey DF, Gagen S, Figueroa LA, Munakata-Marr J. Lifecycle Comparison of Mainstream Anaerobic Baffled Reactor and Conventional Activated Sludge Systems for Domestic Wastewater Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10500-10510. [PMID: 30130383 DOI: 10.1021/acs.est.7b06684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The objective of this study was to evaluate the lifecycle impacts of anaerobic primary treatment of domestic wastewater using anaerobic baffled reactors (ABRs) coupled with aerobic secondary treatment relative to conventional wastewater and sludge/biosolids treatment systems through the application of wastewater treatment modeling and three lifecycle-based analyses: environmental lifecycle assessment, net energy balance, and lifecycle costing. Data from two pilot-scale ABRs operated under ambient wastewater temperatures were used to model the anaerobic primary treatment process. To address uncertain parameters in the scale-up of pilot-scale anaerobic reactor data, uncertainty analysis and Monte Carlo simulation were employed. This study demonstrates that anaerobic primary treatment of domestic wastewater using ABRs can be incorporated with existing aerobic treatment strategies to reduce aeration demand, reduce sludge production, and increase energy generation. The net result of coupling anaerobic primary treatment with aerobic secondary treatment is a more favorable net energy balance, reduced environmental impacts in most examined categories, and lower lifecycle costs relative to conventional treatment configurations; however, the removal and/or capture of dissolved methane is required to reduce global warming impacts and increase on-site energy generation. With further study, anaerobic primary treatment can be a path forward for energy-positive wastewater treatment.
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Affiliation(s)
- Andrew R Pfluger
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
| | - Jennie L Callahan
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
| | - Jennifer Stokes-Draut
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , University of California , Berkeley , California 94720 , United States
| | - Dotti F Ramey
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
| | - Sonja Gagen
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , Clarkson University , Potsdam , New York 13699 , United States
| | - Linda A Figueroa
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
| | - Junko Munakata-Marr
- NSF Engineering Research Center ReNUWIt, Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
- Department of Civil and Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
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82
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Lai CY, Dong QY, Chen JX, Zhu QS, Yang X, Chen WD, Zhao HP, Zhu L. Role of Extracellular Polymeric Substances in a Methane Based Membrane Biofilm Reactor Reducing Vanadate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10680-10688. [PMID: 30106284 DOI: 10.1021/acs.est.8b02374] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For the first time, we demonstrated vanadate (V(V)) reduction in a membrane biofilm reactor (MBfR) using CH4 as the sole electron donor. The V(V)-reducing capability of the biofilm kept increasing, with complete removal of V(V) achieved when the influent surface loading of V(V) was 363 mg m-2 day-1. Almost all V(V) was reduced to V(IV) precipitates, which is confirmed by a scanning electron microscope coupled to energy dispersive X-ray spectroscopy (SEM-EDS) and X-ray photoelectron spectroscopy (XPS). Microbial community analysis revealed that denitrifiers Methylomonas and Denitratisoma might be the main genera responsible for V(V) reduction. The constant enrichment of Methylophilus suggests that the intermediate (i.e., methanol) from CH4 metabolism might be used as the electron carriers for V(V) bioreduction. Intrusion of V(V) (2-5 mg/L, at the surface loading of 150-378 mg m-2 day-1) into the biofilm stimulated the secretion of extracellular polymeric substances (EPS), but high loading of V(V) (10 mg/L, at the surface loading of 668 mg m-2 day-1) decreased the amount of EPS. Metagenomic prediction analysis established the strong correlation between the secretion of EPS and the microbial metabolism associated with V(V) reduction, tricarboxylic acid cycle (TCA) cycle, methane oxidation, and ATP production, and EPS might relieve the oxidative stress induced by high loading of V(V). Colorimetric determination and a three-dimensional excitation-emission matrix (3D-EEM) showed that tryptophan and humic acid-like substances might play important roles in microbial cell protection and V(V) binding. Fourier transform infrared (FTIR) spectroscopy identified hydroxyl (-OH) and carboxyl (COO-) groups in EPS as the candidate functional groups for binding V(V).
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Affiliation(s)
- Chun-Yu Lai
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
- Advanced Water Management Centre , The University of Queensland , St. Lucia , Queensland 4072 , Australia
| | - Qiu-Yi Dong
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Jia-Xian Chen
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Quan-Song Zhu
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Xin Yang
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Wen-Da Chen
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - He-Ping Zhao
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety , Zhejiang University , Hangzhou , Zhejiang , China 310058
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
| | - Liang Zhu
- College of Environmental and Resource Sciences , Zhejiang University , Hangzhou , China 310058
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety , Zhejiang University , Hangzhou , Zhejiang , China 310058
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83
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Proof of concept and improvement of a triple chamber biosystem coupling anaerobic digestion, nitrification and mixotrophic endogenous denitrification for organic matter, nitrogen and sulfide removal from domestic sewage. Bioprocess Biosyst Eng 2018; 41:1839-1850. [DOI: 10.1007/s00449-018-2006-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/05/2018] [Indexed: 01/17/2023]
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84
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Ontiveros-Valencia A, Zhou C, Zhao HP, Krajmalnik-Brown R, Tang Y, Rittmann BE. Managing microbial communities in membrane biofilm reactors. Appl Microbiol Biotechnol 2018; 102:9003-9014. [PMID: 30128582 DOI: 10.1007/s00253-018-9293-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/04/2018] [Accepted: 08/06/2018] [Indexed: 11/29/2022]
Abstract
Membrane biofilm reactors (MBfRs) deliver gaseous substrates to biofilms that develop on the outside of gas-transfer membranes. When an MBfR delivers electron donors hydrogen (H2) or methane (CH4), a wide range of oxidized contaminants can be reduced as electron acceptors, e.g., nitrate, perchlorate, selenate, and trichloroethene. When O2 is delivered as an electron acceptor, reduced contaminants can be oxidized, e.g., benzene, toluene, and surfactants. The MBfR's biofilm often harbors a complex microbial community; failure to control the growth of undesirable microorganisms can result in poor performance. Fortunately, the community's structure and function can be managed using a set of design and operation features as follows: gas pressure, membrane type, and surface loadings. Proper selection of these features ensures that the best microbial community is selected and sustained. Successful design and operation of an MBfR depends on a holistic understanding of the microbial community's structure and function. This involves integrating performance data with omics results, such as with stoichiometric and kinetic modeling.
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Affiliation(s)
- A Ontiveros-Valencia
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN, 46617, USA. .,Escuela de Ingenieria y Ciencias, Tecnologico de Monterrey, Campus Puebla, Ave. Atlixcáyotl 2301, 72453, Puebla, Pue, Mexico. .,Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 1001S McAllister Ave, Tempe, AZ, 85287-5701, USA.
| | - C Zhou
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 1001S McAllister Ave, Tempe, AZ, 85287-5701, USA
| | - H-P Zhao
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Water Pollution Control & Environmental Safety, Zhejiang University, Hangzhou, Zhejiang, China
| | - R Krajmalnik-Brown
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 1001S McAllister Ave, Tempe, AZ, 85287-5701, USA.,School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA
| | - Y Tang
- FAMU-FSU College of Engineering, Florida State University, 2525 Pottsdamer Street, Tallahassee, FL, 32310, USA
| | - B E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 1001S McAllister Ave, Tempe, AZ, 85287-5701, USA.,School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA
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85
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Lai CY, Dong QY, Rittmann BE, Zhao HP. Bioreduction of Antimonate by Anaerobic Methane Oxidation in a Membrane Biofilm Batch Reactor. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8693-8700. [PMID: 30001126 DOI: 10.1021/acs.est.8b02035] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Employing a special anaerobic membrane biofilm batch reactor (MBBR), we demonstrated antimonate (Sb(V)) reduction using methane (CH4) as the sole electron donor. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman and photoluminescence (PL) spectra identified that Sb2O3 microcrystals were the main reduced products. The Sb(V) reduction rate increased continually over the 111-day experiment, which supports the enrichment of the microorganisms responsible for Sb(V) reduction to Sb(III). Copy numbers of the mcrA gene and archaeal and bacterial 16 S rRNA genes increased in parallel. Clone library and Illumina sequencing of 16S rRNA gene demonstrated that Methanosarcina became the dominant archaea in the biofilm, suggesting that Methanosarcina might play an important role in Sb(V) reduction in the CH4-based MBBR.
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Affiliation(s)
- Chun-Yu Lai
- College of Environmental and Resource Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- Advanced Water Management Centre , The University of Queensland , St Lucia , Queensland 4072 , Australia
| | - Qiu-Yi Dong
- College of Environmental and Resource Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology , Arizona State University , P.O. Box 875701, Tempe , Arizona 85287-5701 , United States
| | - He-Ping Zhao
- College of Environmental and Resource Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety , Zhejiang University , Hangzhou , Zhejiang 310058 , China
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science , Zhejiang University , Hangzhou , Zhejiang 310058 , China
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86
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Costa DD, Gomes AA, Fernandes M, Lopes da Costa Bortoluzzi R, Magalhães MDLB, Skoronski E. Using natural biomass microorganisms for drinking water denitrification. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 217:520-530. [PMID: 29631241 DOI: 10.1016/j.jenvman.2018.03.120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 03/15/2018] [Accepted: 03/27/2018] [Indexed: 06/08/2023]
Abstract
Among the methods that are studied to eliminate nitrate from drinking water, biological denitrification is an attractive strategy. Although several studies report the use of denitrifying bacteria for nitrate removal, they usually involve the use of sewage sludge as biomass to obtain the microbiota. In the present study, denitrifying bacteria was isolated from bamboo, and variable parameters were controlled focusing on optimal bacterial performance followed by physicochemical analysis of water adequacy. In this way, bamboo was used as a source of denitrifying microorganisms, using either Immobilized Microorganisms (IM) or Suspended Microorganisms (SM) for nitrate removal. Denitrification parameters optimization was carried out by analysis of denitrification at different pH values, temperature, nitrate concentrations, carbon sources as well as different C/N ratios. In addition, operational stability and denitrification kinetics were evaluated. Microorganisms present in the biomass responsible for denitrification were identified as Proteus mirabilis. The denitrified water was submitted to physicochemical treatment such as coagulation and flocculation to adjust to the parameters of color and turbidity to drinking water standards. Denitrification using IM occurred with 73% efficiency in the absence of an external carbon source. The use of SM provided superior denitrification efficiency using ethanol (96.46%), glucose (98.58%) or glycerol (98.5%) as carbon source. The evaluation of the operational stability allowed 12 cycles of biomass reuse using the IM and 9 cycles using the SM. After physical-chemical treatment, only SM denitrified water remained within drinking water standards parameters of color and turbidity.
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Affiliation(s)
- Darleila Damasceno Costa
- Universidade do Estado de Santa Catarina, Departamento de Engenharia Ambiental, Laboratório de Tratamento de Água e Resíduos, Av. Luís de Camões, 2090, CEP 88520-000, Lages, Santa Catarina, Brazil
| | - Anderson Albino Gomes
- Universidade do Estado de Santa Catarina, Departamento de Engenharia Ambiental, Laboratório de Tratamento de Água e Resíduos, Av. Luís de Camões, 2090, CEP 88520-000, Lages, Santa Catarina, Brazil
| | - Mylena Fernandes
- Universidade Federal de Santa Catarina, Departamento de Engenharia Química e Engenharia de Alimentos, Laboratório de Engenharia Bioquímica, Campus Universitário Trindade, CEP 88040-900, Florianópolis, Santa Catarina, Brazil
| | - Roseli Lopes da Costa Bortoluzzi
- Universidade do Estado de Santa Catarina, Departamento de Engenharia Florestal, Herbário Lages da Universidade do Estado de Santa Catarina, Av. Luís de Camões, 2090, CEP 88520-000, Lages, Santa Catarina, Brazil
| | - Maria de Lourdes Borba Magalhães
- Universidade do Estado de Santa Catarina, Departamento de Produção Animal e Alimentos, Laboratório de Tecnologia Enzimática, Av. Luís de Camões, 2090, CEP 88520-000, Lages, Santa Catarina, Brazil
| | - Everton Skoronski
- Universidade do Estado de Santa Catarina, Departamento de Engenharia Ambiental, Laboratório de Tratamento de Água e Resíduos, Av. Luís de Camões, 2090, CEP 88520-000, Lages, Santa Catarina, Brazil.
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87
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Optimization of Nitrogen Removal in Solid Carbon Source SND for Treatment of Low-Carbon Municipal Wastewater with RSM Method. WATER 2018. [DOI: 10.3390/w10070827] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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88
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Xia X, Zhang S, Li S, Zhang L, Wang G, Zhang L, Wang J, Li Z. The cycle of nitrogen in river systems: sources, transformation, and flux. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2018; 20:863-891. [PMID: 29877524 DOI: 10.1039/c8em00042e] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nitrogen is a requisite and highly demanded element for living organisms on Earth. However, increasing human activities have greatly altered the global nitrogen cycle, especially in rivers and streams, resulting in eutrophication, formation of hypoxic zones, and increased production of N2O, a powerful greenhouse gas. This review focuses on three aspects of the nitrogen cycle in streams and rivers. We firstly introduce the distributions and concentrations of nitrogen compounds in streams and rivers as well as the techniques for tracing the sources of nitrogen pollution. Secondly, the overall picture of nitrogen transformations in rivers and streams conducted by organisms is described, especially focusing on the roles of suspended particle-water surfaces in overlying water, sediment-water interfaces, and riparian zones in the nitrogen cycle of streams and rivers. The coupling of nitrogen and other element (C, S, and Fe) cycles in streams and rivers is also briefly covered. Finally, we analyze the nitrogen budget of river systems as well as nitrogen loss as N2O and N2 through the fluvial network and give a summary of the effects and consequences of human activities and climate change on the riverine nitrogen cycle. In addition, future directions for the research on the nitrogen cycle in river systems are outlined.
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Affiliation(s)
- Xinghui Xia
- School of Environment, Beijing Normal University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing, 100875, China.
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89
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Lai CY, Lv PL, Dong QY, Yeo SL, Rittmann BE, Zhao HP. Bromate and Nitrate Bioreduction Coupled with Poly-β-hydroxybutyrate Production in a Methane-Based Membrane Biofilm Reactor. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7024-7031. [PMID: 29785845 DOI: 10.1021/acs.est.8b00152] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This work demonstrates bromate (BrO3-) reduction in a methane (CH4)-based membrane biofilm reactor (MBfR), and it documents contrasting impacts of nitrate (NO3-) on BrO3- reduction, as well as formation of poly-β-hydroxybutyrate (PHB), an internal C- and electron-storage material. When the electron donor, CH4, was in ample supply, NO3- enhanced BrO3- reduction by stimulating the growth of denitrifying bacteria ( Meiothermus, Comamonadaceae, and Anaerolineaceae) able to reduce BrO3- and NO3- simultaneously. This was supported by increases in denitrifying enzymes (e.g., nitrate reductase, nitrite reductase, nitrous-oxide reductase, and nitric-oxide reductase) through quantitative polymerase chain reaction (qPCR) analysis and metagenomic prediction of these functional genes. When the electron donor was in limited supply, NO3- was the preferred electron acceptor over BrO3- due to competition for the common electron donor; this was supported by the significant oxidation of stored PHB when NO3- was high enough to cause electron-donor limitation. Methanotrophs (e.g., Methylocystis, Methylomonas, and genera within Comamonadaceae) were implicated as the main PHB producers in the biofilms, and their ability to oxidize PHB mitigated the impacts of competition for CH4.
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Affiliation(s)
- Chun-Yu Lai
- College of Environmental and Resource Science , Zhejiang University , Hangzhou 310027 , China
| | - Pan-Long Lv
- College of Environmental and Resource Science , Zhejiang University , Hangzhou 310027 , China
| | - Qiu-Yi Dong
- College of Environmental and Resource Science , Zhejiang University , Hangzhou 310027 , China
| | - Shi Lei Yeo
- College of Environmental and Resource Science , Zhejiang University , Hangzhou 310027 , China
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology , Arizona State University , P.O. Box 875701, Tempe , Arizona 85287-5701 , United States
| | - He-Ping Zhao
- College of Environmental and Resource Science , Zhejiang University , Hangzhou 310027 , China
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90
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Huete A, de Los Cobos-Vasconcelos D, Gómez-Borraz T, Morgan-Sagastume JM, Noyola A. Control of dissolved CH 4 in a municipal UASB reactor effluent by means of a desorption - Biofiltration arrangement. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 216:383-391. [PMID: 28701283 DOI: 10.1016/j.jenvman.2017.06.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 06/01/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
The direct anaerobic treatment of municipal wastewater represents an adapted technology to the conditions of developing countries. In order to get an increased acceptance of this technology, a proper control of dissolved methane in the anaerobic effluents should be considered, as methane is a potent greenhouse gas. In this study, a pilot-scale system was operated for 168 days to recover dissolved methane from an effluent of an upflow anaerobic sludge blanket reactor and then oxidize it in a compost biofilter. The system operated at a constant air (0.9 m3/h ±0.09) and two air-to anaerobic effluent ratio (1:1 and 1:2). In both conditions (CH4 concentration of 2.7 ± 0.87 and 4.3% ± 1.14, respectively) the desorption column recovered 99% of the dissolved CH4 and approximately 30% ± 8.5 of H2S, whose desorption was limited due to the high pH (>8) of the effluent. The biofilter removed 70% ± 8 of the average CH4 load (60 gCH4/m3h ± 13) and 100% of the H2S load at an empty bed retention time of 23 min. The average temperature inside the biofilter was 42 ± 9 °C due to the CH4 oxidation reaction, indicating that temperature and moisture control is particularly important for CH4 removal in compost biofilters. The system may achieve a 54% reduction of greenhouse gas emissions from dissolved CH4 in this particular case.
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Affiliation(s)
- A Huete
- Instituto de Ingeniería, Universidad Nacional Autónoma de México (UNAM) Ciudad Universitaria, 04340, México D.F., Mexico
| | - D de Los Cobos-Vasconcelos
- Instituto de Ingeniería, Universidad Nacional Autónoma de México (UNAM) Ciudad Universitaria, 04340, México D.F., Mexico
| | - T Gómez-Borraz
- Instituto de Ingeniería, Universidad Nacional Autónoma de México (UNAM) Ciudad Universitaria, 04340, México D.F., Mexico
| | - J M Morgan-Sagastume
- Instituto de Ingeniería, Universidad Nacional Autónoma de México (UNAM) Ciudad Universitaria, 04340, México D.F., Mexico
| | - A Noyola
- Instituto de Ingeniería, Universidad Nacional Autónoma de México (UNAM) Ciudad Universitaria, 04340, México D.F., Mexico.
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91
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Kampman C, Piai L, Temmink H, Hendrickx TLG, Zeeman G, Buisman CJN. Effect of low concentrations of dissolved oxygen on the activity of denitrifying methanotrophic bacteria. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 77:2589-2597. [PMID: 29944124 DOI: 10.2166/wst.2018.219] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chemical energy can be recovered from municipal wastewater as biogas through anaerobic treatment. Effluent from direct anaerobic wastewater treatment at low temperatures, however, still contains ammonium and considerable amounts of dissolved methane. After nitritation, methane can be used as electron donor for denitrification by the anaerobic bacterium 'Candidatus Methylomirabilis oxyfera'. It was shown that in the presence of 0.7% O2, denitrifying methanotrophic activity slightly increased and returned to its original level after oxygen had been removed. At 1.1% O2, methane consumption rate increased 118%, nitrite consumption rate increased 58%. After removal of oxygen, methane consumption rate fully recovered, and nitrite consumption rate returned to 88%. Therefore, traces of oxygen that bacteria are likely to be exposed to in wastewater treatment are not expected to negatively affect the denitrifying methanotrophic process. 2.0% O2 inhibited denitrifying activity. Nitrite consumption rate decreased 60% and did not recover after removal of oxygen. No clear effect on methane consumption was observed. Further studies should evaluate if intermittent addition of oxygen results in increased growth rates of the slow-growing 'Candidatus Methylomirabilis oxyfera'.
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Affiliation(s)
- Christel Kampman
- Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands E-mail: ; Present address: Borås Energi och Miljö AB, Västerlånggatan 10, 503 30 Borås, Sweden
| | - Laura Piai
- Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands E-mail:
| | - Hardy Temmink
- Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands E-mail:
| | - Tim L G Hendrickx
- Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands E-mail:
| | - Grietje Zeeman
- Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands E-mail:
| | - Cees J N Buisman
- Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands E-mail:
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92
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Modin O. A mathematical model of aerobic methane oxidation coupled to denitrification. ENVIRONMENTAL TECHNOLOGY 2018; 39:1217-1225. [PMID: 28443363 DOI: 10.1080/09593330.2017.1323961] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 04/21/2017] [Indexed: 06/07/2023]
Abstract
Aerobic methanotrophic bacteria use methane as their only source of energy and carbon. They release organic compounds that can serve as electron donors for co-existing denitrifiers. This interaction between methanotrophs and denitrifiers is known to contribute to nitrogen losses in natural environments and has also been exploited by researchers for denitrification of nitrate-contaminated wastewater. The purpose of this study was to develop a mathematical model describing aerobic methane oxidation coupled to denitrification in suspended-growth reactors. The model considered the activities of three microbial groups: aerobic methanotrophs, facultative methylotrophs, and facultative heterotrophs. The model was tested against data from the scientific literature and used to explore the effects of the oxygen mass transfer coefficient, the solids retention time, and the fraction methane in the feed gas on nitrate removal. The fraction of methane in the feed gas was found to be critical for the nitrate removal rate. A value of about 15% in air was optimal. A lower methane fraction led to excess oxygen, which was detrimental for denitrification. A higher fraction led to oxygen-limitation, which restricted the growth rate of methanotrophs in the reactor.
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Affiliation(s)
- Oskar Modin
- a Division of Water Environment Technology, Department of Architecture and Civil Engineering , Chalmers University of Technology , Gothenburg , Sweden
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93
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He Z, Feng Y, Zhang S, Wang X, Wu S, Pan X. Oxygenic denitrification for nitrogen removal with less greenhouse gas emissions: Microbiology and potential applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 621:453-464. [PMID: 29195194 DOI: 10.1016/j.scitotenv.2017.11.280] [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: 10/07/2017] [Revised: 11/24/2017] [Accepted: 11/24/2017] [Indexed: 06/07/2023]
Abstract
Nitrogen pollution is a worldwide problem and has been extensively treated by canonical denitrification (CDN) process. However, the CDN process generates several issues such as intensive greenhouse gas (GHG) emissions. In the past years, a novel biological nitrogen removal (BNR) process of oxygenic denitrification (O2DN) has been proposed as a promising alternative to the CDN process. The classic denitrification four steps are simplified to three steps by O2DN bacteria without producing and releasing the intermediate nitrous oxide (N2O), a potent GHG. In this article, we summarized the findings in previous literatures as well as our results, including involved microorganisms and metabolic mechanisms, functional genes and microbial detection, kinetics and influencing factors and their potential applications in wastewater treatment. Based on our knowledge and experience, the benefits and limitations of the current O2DN process were analyzed. Since O2DN is a new field in wastewater treatment, more research and application is required, especially the development of integrated processes and the quantitative assessment of the contribution of O2DN process in natural habitats and engineered systems.
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Affiliation(s)
- Zhanfei He
- College of Environment, Zhejiang University of Technology, Hangzhou, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
| | - Yudong Feng
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Shijie Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Xiaonan Wang
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Shuyun Wu
- College of Environment, Zhejiang University of Technology, Hangzhou, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
| | - Xiangliang Pan
- College of Environment, Zhejiang University of Technology, Hangzhou, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, Zhejiang University of Technology, Hangzhou, China.
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94
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Luo JH, Chen H, Yuan Z, Guo J. Methane-supported nitrate removal from groundwater in a membrane biofilm reactor. WATER RESEARCH 2018; 132:71-78. [PMID: 29306701 DOI: 10.1016/j.watres.2017.12.064] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 11/21/2017] [Accepted: 12/23/2017] [Indexed: 06/07/2023]
Abstract
The discovery of denitrifying anaerobic methane oxidation (DAMO) has not only improved our understanding of global methane and nitrogen cycles, but also provided new technology options for removal of nitrate from nitrate-contaminated water. Previous studies have demonstrated DAMO organisms could remove nitrate and nitrite from wastewater under strictly anaerobically conditions. In the study, we investigate the feasibility of nitrate removal from groundwater, which contains dissolved oxygen in addition to nitrate. A membrane biofilm reactor (MBfR), inoculated with DAMO co-culture, was capable of treating synthetic groundwater containing highly contaminated nitrate (50 mg N/L) and oxygen (7-9 mg O2/L), with a maximum volumetric nitrate removal rate of 45 mg N/L-d. Accumulations of acetate and propionate were observed in some transient periods, indicating the possible involvement of acetate and propionate as intermediates in methane oxidation. The 16 S rRNA gene amplicon sequencing revealed that Candidatus Methylomirabilis, a known bacterial DAMO organism able to couple nitrite reduction with anaerobic oxidation of methane (AOM), was the dominant population. No archaeal DAMO organisms that are capable of coupling nitrate to AOM were observed, however, considerable amount of denitrifiers were developed in this system. Based on known metabolisms of these microorganisms and a series of batch studies, it was assumed that methane was oxidized into volatile fatty acids (VFAs) under oxygen-limiting conditions, then the generated VFAs served as carbon sources for these heterotrophic denitrifiers to remove nitrate. This study offers a potential technology for nitrate removal from groundwater by DAMO process in MBfR.
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Affiliation(s)
- Jing-Huan Luo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Hui Chen
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jianhua Guo
- Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia.
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95
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Liu D, Li J, Li C, Deng Y, Zhang Z, Ye Z, Zhu S. Poly(butylene succinate)/bamboo powder blends as solid-phase carbon source and biofilm carrier for denitrifying biofilters treating wastewater from recirculating aquaculture system. Sci Rep 2018; 8:3289. [PMID: 29459646 PMCID: PMC5818489 DOI: 10.1038/s41598-018-21702-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/08/2018] [Indexed: 11/09/2022] Open
Abstract
In this study, Poly(butylene succinate)/bamboo powder (PBS/BP) was newly applied and tested for 8 months as the carbon source in two moving bed reactors for nitrate removal in real RAS wastewater (fresh/sea water), with the purposes of simultaneous reducing the cost of PBS packing and effluent DOC. Fast start-ups were obtained in both reactors, in which high denitrification rates were observed (0.68 ± 0.03 and 0.83 ± 0.11 kg [Formula: see text]-N m-3 d-1 for fresh and sea water, respectively) with no nitrite and low ammonia accumulation. Reduced DOC concentrations in the effluents were also observed compared to pure PBS. The freezing of PBS/BP showed a further slower release of DOC, which might be beneficial to the life of the PBS/BP for the denitrification process, however, microbial activity, especially in high salinity wastewater, was observed to have declined. Illumina sequencing revealed that the autotrophic genus arcobacter was discovered first time in solid-phase denitrification system with salinity. Redundancy analysis (RDA) was used to reveal the relationships between environmental factors and the microbial community. In overall, PBS/BP blends were proven to be an economically attractive carbon source for nitrate removal in RAS.
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Affiliation(s)
- Dezhao Liu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Jiawei Li
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Changwei Li
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Yale Deng
- Aquaculture and Fisheries Group, Department of Animal Sciences, Wageningen University, 6708 WD, Wageningen, The Netherlands
| | - Zeqing Zhang
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Zhangying Ye
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
| | - Songming Zhu
- Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
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96
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Microbiome analysis and -omics studies of microbial denitrification processes in wastewater treatment: recent advances. SCIENCE CHINA-LIFE SCIENCES 2018; 61:753-761. [DOI: 10.1007/s11427-017-9228-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/22/2017] [Indexed: 10/18/2022]
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97
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Lee YY, Jung H, Ryu HW, Oh KC, Jeon JM, Cho KS. Seasonal characteristics of odor and methane mitigation and the bacterial community dynamics in an on-site biocover at a sanitary landfill. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 71:277-286. [PMID: 29089227 DOI: 10.1016/j.wasman.2017.10.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 10/12/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
Landfills are key anthropogenic emission sources for odors and methane. For simultaneous mitigation of odors and methane emitted from landfills, a pilot-scale biocover (soil:perlite:earthworm cast:compost, 6:2:1:1, v/v) was constructed at a sanitary landfill in South Korea, and the biocover performance and its bacterial community dynamics were monitored for 240 days. The removal efficiencies of odor and methane were evaluated to compare the odor dilution ratios or methane concentrations at the biocover surface and landfill soil cover surface where the biocover was not installed. The odor removal efficiency was maintained above 85% in all seasons. The odor dilution ratios ranged from 300 to 3000 at the biocover surface, but they were 6694-20,801 at the landfill soil cover surface. Additionally, the methane removal efficiency was influenced by the ambient temperature; the methane removal efficiency in winter was 35-43%, while the methane removability was enhanced to 85%, 86%, and 96% in spring, early summer, and late summer, respectively. The ratio of methanotrophs to total bacterial community increased with increasing ambient temperature from 5.4% (in winter) to 12.8-14.8% (in summer). In winter, non-methanotrophs, such as Acinetobacter (8.8%), Rhodanobacter (7.5%), Pedobacter (7.5%), and Arthrobacter (5.7%), were abundant. However, in late summer, Methylobacter (8.8%), Methylocaldum (3.4%), Mycobacterium (1.1%), and Desulviicoccus (0.9%) were the dominant bacteria. Methylobacter was the dominant methanotroph in all seasons. These seasonal characteristics of the on-site biocover performance and its bacterial community are useful for designing a full-scale biocover for the simultaneous mitigation of odors and methane at landfills.
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Affiliation(s)
- Yun-Yeong Lee
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Hyekyeng Jung
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Hee-Wook Ryu
- Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea
| | - Kyung-Cheol Oh
- Green Environmental Complex Center, Suncheon 57992, Republic of Korea
| | - Jun-Min Jeon
- Green Environmental Complex Center, Suncheon 57992, Republic of Korea
| | - Kyung-Suk Cho
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.
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98
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Yu Z, Beck DAC, Chistoserdova L. Natural Selection in Synthetic Communities Highlights the Roles of Methylococcaceae and Methylophilaceae and Suggests Differential Roles for Alternative Methanol Dehydrogenases in Methane Consumption. Front Microbiol 2017; 8:2392. [PMID: 29259591 PMCID: PMC5723320 DOI: 10.3389/fmicb.2017.02392] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/20/2017] [Indexed: 12/31/2022] Open
Abstract
We describe experiments that follow species dynamics and gene expression patterns in synthetic bacterial communities including species that compete for the single carbon substrate supplied, methane, and species unable to consume methane, which could only succeed through cooperative interactions. We demonstrate that these communities mostly select for two functional guilds, methanotrophs of the family Methylococcaceae and non-methanotrophic methylotrophs of the family Methylophilaceae, these taxonomic guilds outcompeting all other species included in the synthetic mix. The metatranscriptomics analysis uncovered that in both Methylococcaceae and Methylophilaceae, some of the most highly transcribed genes were the ones encoding methanol dehydrogenases (MDH). Remarkably, expression of alternative MDH genes (mxaFI versus xoxF), previously shown to be subjects to the rare Earth element switch, was found to depend on environmental conditions such as nitrogen source and methane and O2 partial pressures, and also to be species-specific. Along with the xoxF genes, genes encoding divergent cytochromes were highly expressed in both Methylophilaceae and Methylococcaceae, suggesting their function in methanol metabolism, likely encoding proteins serving as electron acceptors from XoxF enzymes. The research presented tested a synthetic community model that is much simplified compared to natural communities consuming methane, but more complex than the previously utilized two-species model. The performance of this model identifies prominent species for future synthetic ecology experiments and highlights both advantages of this approach and the challenges that it presents.
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Affiliation(s)
- Zheng Yu
- Department of Chemical Engineering, University of Washington, Seattle, WA, United States
| | - David A C Beck
- Department of Chemical Engineering, University of Washington, Seattle, WA, United States.,eScience Institute, University of Washington, Seattle, WA, United States
| | - Ludmila Chistoserdova
- Department of Chemical Engineering, University of Washington, Seattle, WA, United States
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99
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Sediment-Water Methane Flux in a Eutrophic Pond and Primary Influential Factors at Different Time Scales. WATER 2017. [DOI: 10.3390/w9080601] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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100
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Yu Z, Chistoserdova L. Communal metabolism of methane and the rare Earth element switch. J Bacteriol 2017; 199:e00328-17. [PMID: 28630125 PMCID: PMC5648859 DOI: 10.1128/jb.00328-17] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Metabolism of methane is an important part of biogeochemical cycling of carbon. Methane is also a major contributor to climate change. A specialized group of microbes that consume methane, the methanotrophs, represent a natural filter preventing an even faster accumulation of methane in the atmosphere. Methanotrophy can proceed via both anaerobic and aerobic modes. The anaerobic methanotrophs, represented by both archaea and bacteria, all appear to be engaged in syntrophic interdependencies with other species, to overcome the energetic barriers of methane metabolism in the absence of oxygen. In contrast, aerobic methanotrophy can be carried out by pure cultures of bacteria. Nevertheless, a concept of communal function in aerobic methane oxidation has been gaining momentum, based on data from natural cooccurrence of specific functional guilds, and based on results from laboratory manipulations. The mechanistic details are still sparse on how and why the methanotrophs share their carbon with other species, and whether and what they gain in return. In this minireview we highlight recent studies that led to this new concept of community function in aerobic methane oxidation. We first describe the stable isotope probing experiments employing heavy carbon-labeled methane, tracing methane carbon consumption. We then follow up with analysis of data from microcosm community dynamics. We further discuss the role of a synthetic community approach in unraveling the principles of carbon flow and species cooperation in methane consumption. Finally, we touch on the role of lanthanides, which are rare Earth elements, previously thought to be biologically inert, in bacterial metabolism of methane.
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Affiliation(s)
- Zheng Yu
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195
| | - Ludmila Chistoserdova
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195
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