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Cai F, Zuo X, Xiong J, Jiang W. Reduction of methane and nitrous oxide emissions from stormwater bioretention cells through microbial electrolytic cells. BIORESOURCE TECHNOLOGY 2024; 413:131444. [PMID: 39241815 DOI: 10.1016/j.biortech.2024.131444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2024] [Revised: 09/03/2024] [Accepted: 09/03/2024] [Indexed: 09/09/2024]
Abstract
This study investigated the reduction of methane (CH4) and nitrous oxide (N2O) emissions from stormwater bioretention cells through microbial electrolytic cell (MEC), showing the largest reduction of 32.21 % (CH4) at 9.2 μA/m2 of current density and 56.16 % (N2O) at 3.5 μA/m2 of current density, compared with the corresponding in the control (0 μA/m2 of current density). Kinetic of CH4 and N2O emissions could be well fitted by Logistic model with high correlation coefficient (R2 > 0.9500) and model efficiency (ME > 0.95) but low relative root mean square error (RRMSE < 7.88). The increase of pmoA and polysaccharide (PS) were responsible for CH4 reduction, while N2O reduction was attributed to the decrease of nirS and the increase for nosZ and protein (PN), which could explain the lowest GWPd (10.67 mgCO2-eq/m2/h) at 3.5 μA/m2 of current density, suggesting that MEC could be promising for the reduction of CH4 and N2O emissions from bioretention cells.
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Affiliation(s)
- FangYue Cai
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - XiaoJun Zuo
- Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing 210023, China.
| | - Jie Xiong
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - WeiLi Jiang
- Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China
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Wang M, Wang C, Lan X, Abid AA, Xu X, Singla A, Sardans J, Llusià J, Peñuelas J, Wang W. Coupled steel slag and biochar amendment correlated with higher methanotrophic abundance and lower CH 4 emission in subtropical paddies. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:483-497. [PMID: 31342217 DOI: 10.1007/s10653-019-00378-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
Aerobic methanotrophs in paddies serve as methane (CH4) filters and thereby reduce CH4 emissions. Amending soil with waste products can mitigate CH4 emissions in crops, but little is known about the impacts of amendments with steel slag and biochar on the populations and activities of aerobic methanotrophs in rice cropland. We used real-time quantitative PCR detecting system and high-throughput sequencing to determine the effects of slag and biochar amendments on CH4 emission, abundance, and community structure of methanotrophs, and the relationships between soil properties and the abundance and community composition of methanotrophs during the rice growing season in both early and late paddies. Soil salinity and pH were significantly higher for an amendment with both slag and biochar than the control in both the early and late paddies, and pH was significantly higher for a slag amendment in the late paddy. Cumulative CH4 emission was lower for the slag and slag + biochar amendments than the control in early paddy by-34.1%. Methanotrophic abundance was three- and sixfold higher for the slag + biochar amendment than the control in the early and late paddies (p < 0.05), respectively. The abundance of different groups of methanotrophs varied among the treatments. The relative abundance of Methylosarcina was higher for the slag amendment than the control, and the relative abundance of Methylomonas was lower for biochar, and slag + biochar amendments than the control. The relative abundance of Methylocystis was higher for the slag and slag + biochar amendments than the control in the early paddy, and the relative abundance of Methylocystis was higher for the slag, biochar, and slag + biochar amendments in the late paddy. Univariate and multivariate analyses indicated that the higher abundance of methanotrophic bacteria for the slag and slag + biochar amendments was correlated with soil pH, salinity, soil organic carbon, and C/N ratio, and the relative abundances of Methylocystis, Methylomonas, and Methylosarcina were associated with the effective mitigation of CH4 emission in the paddies. A discriminant general analysis indicated that the total population of methanotrophs was larger for the slag + biochar amendment than the control, and that this effect was only weakly correlated with changes in the soil properties, demonstrating that this effect on the size and species composition of methanotrophic soil populations was mostly associated with a direct effect of the slag + biochar amendment.
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Affiliation(s)
- Miaoying Wang
- College of Life Science, Fujian Normal University, Fuzhou, 350108, China
| | - Chun Wang
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, China
| | - Xingfu Lan
- College of Life Science, Fujian Normal University, Fuzhou, 350108, China
| | - Abbas Ali Abid
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Xuping Xu
- College of Life Science, Fujian Normal University, Fuzhou, 350108, China.
| | - Ankit Singla
- Regional Centre of Organic Farming, Ministry of Agriculture and Farmers Welfare, Bhubaneswar, Odisha, 751-021, India
| | - Jordi Sardans
- Global Ecology Unit, CREAF-CSIC-UAB, CSIC, 08193, Bellaterra, Catalonia, Spain.
- CREAF, 08193, Cerdanyola del Vallès, Catalonia, Spain.
| | - Joan Llusià
- Global Ecology Unit, CREAF-CSIC-UAB, CSIC, 08193, Bellaterra, Catalonia, Spain
- CREAF, 08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Josep Peñuelas
- Global Ecology Unit, CREAF-CSIC-UAB, CSIC, 08193, Bellaterra, Catalonia, Spain
- CREAF, 08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Weiqi Wang
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, 350007, China.
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Pan J, Wang X, Cao A, Zhao G, Zhou C. Screening methane-oxidizing bacteria from municipal solid waste landfills and simulating their effects on methane and ammonia reduction. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:37082-37091. [PMID: 31745784 DOI: 10.1007/s11356-019-06545-5] [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: 09/13/2018] [Accepted: 09/16/2019] [Indexed: 06/10/2023]
Abstract
Municipal solid waste landfills are not only a crucial source of global greenhouse gas emissions; they also produce large amounts of ammonia (NH3), hydrogen sulfide, and other odorous gases that negatively affect the regional environment. Several types of methane-oxidizing bacteria (MOB) were proved to be effective in mitigating methane emission from landfills. Nevertheless, more MOB species and their technical parameters for best mitigating methane still need to be explored. In landfills, methane is simultaneously generated with ammonia, which may impede the CH4 bio-oxidizing process of MOB. However, very limited studies examined the enhancement of methane reduction by introducing ammonia-oxidizing bacteria (AOB) in landfills. In this study, two enriched MOB cultures were gained from a typical municipal solid waste landfill, and then were cultured with three strains of ammonia-oxidizing bacteria (AOB). The MOB enrichment culture used in this work includes Methylocaldum, Methylocystaceae, and Methyloversatilis, with a methane oxidation capacity of 43.6-65.0%, and the AOB includes Candida ethanolica, Bacillus cereus, and Alcaligenes faecalis. The effects on the emission reduction of both NH3 and CH4 were measured using self-made landfill-simulating equipment, as MOB, AOB, and a MOB-AOB mixture were added to the soil cover of the simulation equipment. The concentrations of CH4 and NH3 in the MOB-AOB mixture group decreased sharply, and the CH4 and NH3 concentration was 76.4% and 83.7% of the control group level. We also found that addition of AOB can help MOB oxidize CH4 and improve the emission reduction effect.
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Affiliation(s)
- Jingran Pan
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
| | - Xiaolin Wang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
| | - Aixin Cao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Guozhu Zhao
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China.
| | - Chuanbin Zhou
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
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