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Grégoire DS, George NA, Hug LA. Microbial methane cycling in a landfill on a decadal time scale. Nat Commun 2023; 14:7402. [PMID: 37973978 PMCID: PMC10654671 DOI: 10.1038/s41467-023-43129-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023] Open
Abstract
Landfills generate outsized environmental footprints due to microbial degradation of organic matter in municipal solid waste, which produces the potent greenhouse gas methane. With global solid waste production predicted to increase substantially in the next few decades, there is a pressing need to better understand the temporal dynamics of biogeochemical processes that control methane cycling in landfills. Here, we use metagenomic approaches to characterize microbial methane cycling in waste that was landfilled over 39 years. Our analyses indicate that newer waste supports more diverse communities with similar composition compared to older waste, which contains lower diversity and more varied communities. Older waste contains primarily autotrophic organisms with versatile redox metabolisms, whereas newer waste is dominated by anaerobic fermenters. Methane-producing microbes are more abundant, diverse, and metabolically versatile in new waste compared to old waste. Our findings indicate that predictive models for methane emission in landfills overlook methane oxidation in the absence of oxygen, as well as certain microbial lineages that can potentially contribute to methane sinks in diverse habitats.
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Affiliation(s)
- Daniel S Grégoire
- Department of Biology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
- Department of Chemistry, Carleton University, Ottawa, ON, K1S 5B6, Canada.
| | - Nikhil A George
- Department of Biology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Laura A Hug
- Department of Biology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
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2
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Enhanced Methane Oxidation Potential of Landfill Cover Soil Modified with Aged Refuse. ATMOSPHERE 2022. [DOI: 10.3390/atmos13050802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Aged refuse with a landfill age of 1.5 years was collected from a municipal solid waste landfill with high kitchen waste content and mixed with soil as biocover material for landfill. A series of laboratory batch tests was performed to determine the methane oxidation potential and optimal mixing ratio of landfill cover soil modified with aged refuse, and the effects of water content, temperature, CO2/CH4, and O2/CH4 ratios on its methane oxidation capacity were analyzed. The microbial community analysis of aged refuse showed that the proportions of type I and type II methane-oxidizing bacteria were 56.27% and 43.73%, respectively. Aged refuse could significantly enhance the methane oxidation potential of cover soil, and the optimal mixing ratio was approximately 1:1. The optimal temperature and water content were about 25 °C and 30%, respectively. Under the conditions of an initial methane concentration of 15% and an O2/CH4 ratio of 0.8–1.2, the measured methane oxidation rate was negatively correlated with the O2/CH4 ratio. The maximum methane oxidation capacity measured in the test reached 308.5 (μg CH4/g)/h, indicating that the low-age refuse in the landfill with high kitchen waste content is a biocover material with great application potential.
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Coupe SJ, Nnadi EO, Mbanaso FU, Newman AP. An assessment of the potential use of compost filled plastic void forming units to serve as vents on historic landfills and related sites. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:19238-19246. [PMID: 28936639 DOI: 10.1007/s11356-017-0208-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/13/2017] [Indexed: 06/07/2023]
Abstract
Much of the solid municipal waste generated by society is sent to landfill, where biodegrading processes result in the release of methane, a major contributor to climate change. This work examined the possibility of installing a type of biofilter within paved areas of the landfill site, making use of modified pervious paving, both to allow the escape of ground gas and to avoid contamination of groundwater, using specially designed test models with provision for gas sampling in various chambers. It proposes the incorporation of an active layer within a void forming box with a view to making dual use of the pervious pavement to provide both a drainage feature and a ground gas vent, whilst providing an active layer for the oxidation of methane by microbial action. The methane removal was observed to have been effected by microbial oxidation and as such offers great promise as a method of methane removal to allow for development of landfills.
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Affiliation(s)
| | - Ernest O Nnadi
- Coventry University, Priory Street, Coventry, CV1 5FB, UK
| | | | - Alan P Newman
- Coventry University, Priory Street, Coventry, CV1 5FB, UK
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Raga R, Pivato A, Lavagnolo MC, Megido L, Cossu R. Methane oxidation and attenuation of sulphur compounds in landfill top cover systems: Lab-scale tests. J Environ Sci (China) 2018; 65:317-326. [PMID: 29548403 DOI: 10.1016/j.jes.2017.06.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 06/29/2017] [Accepted: 06/30/2017] [Indexed: 06/08/2023]
Abstract
In this study, a top cover system is investigated as a control for emissions during the aftercare of new landfills and for old landfills where biogas energy production might not be profitable. Different materials were studied as landfill cover system in lab-scale columns: mechanical-biological pretreated municipal solid waste (MBP); mechanical-biological pretreated biowaste (PB); fine (PBSf) and coarse (PBSc) mechanical-biological pretreated mixtures of biowaste and sewage sludge, and natural soil (NS). The effectiveness of these materials in removing methane and sulphur compounds from a gas stream was tested, even coupled with activated carbon membranes. Concentrations of CO2, CH4, O2, N2, H2S and mercaptans were analysed at different depths along the columns. Methane degradation was assessed using mass balance and the results were expressed in terms of methane oxidation rate (MOR). The highest maximum and mean MOR were observed for MBP (17.2gCH4/m2/hr and 10.3gCH4/m2/hr, respectively). Similar values were obtained with PB and PBSc. The lowest values of MOR were obtained for NS (6.7gCH4/m2/hr) and PBSf (3.6gCH4/m2/hr), which may be due to their low organic content and void index, respectively. Activated membranes with high load capacity did not seem to have an influence on the methane oxidation process: MBP coupled with 220g/m2 and 360g/m2 membranes gave maximum MOR of 16.5gCH4/m2/hr and 17.4gCH4/m2/hr, respectively. Activated carbon membranes proved to be very effective on H2S adsorption. Furthermore, carbonyl sulphide, ethyl mercaptan and isopropyl mercaptan seemed to be easily absorbed by the filling materials.
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Affiliation(s)
- Roberto Raga
- DII - Department of Industrial Engineering, University of Padova, via Marzolo n 9, 35131 Padova, Italy
| | - Alberto Pivato
- DII - Department of Industrial Engineering, University of Padova, via Marzolo n 9, 35131 Padova, Italy.
| | - Maria Cristina Lavagnolo
- DII - Department of Industrial Engineering, University of Padova, via Marzolo n 9, 35131 Padova, Italy
| | - Laura Megido
- Department of Chemical and Environmental Engineering, Polytechnic School of Engineering, Gijón Campus, University of Oviedo, 33203 Gijón, Spain
| | - Raffaello Cossu
- DII - Department of Industrial Engineering, University of Padova, via Marzolo n 9, 35131 Padova, Italy
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Cui H, Su X, Wei S, Zhu Y, Lu Z, Wang Y, Li Y, Liu H, Zhang S, Pang S. Comparative Analyses of Methanogenic and Methanotrophic Communities Between Two Different Water Regimes in Controlled Wetlands on the Qinghai-Tibetan Plateau, China. Curr Microbiol 2017; 75:484-491. [PMID: 29188321 DOI: 10.1007/s00284-017-1407-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/27/2017] [Indexed: 10/18/2022]
Abstract
Wetlands are an important methane (CH4) emission source. CH4 is mainly produced during the biogeochemical process, in which methanogens and methanotrophs both play important roles. However, little is known how these two microbial communities change under different water regimes. In this study, the diversity and abundance of methanogens and methanotrophs in wetlands on Qinghai-Tibetan Plateau with different water contents (a high water content site DZ2-14-3 and a low water content site DZ2-14-4) were studied by using phylogenetic analysis and quantitative PCR based on mcrA gene and pmoA gene. A total of 16 methanogenic operational taxonomic units (OTUs) and 9 methanotrophic OTUs are obtained. For methanogens, Fen cluster (58.0%) and Methanosaetaceae (20.3%) are the dominant groups in high moisture samples, whereas Methanosaetaceae (32.4%), Methanosarcinaceae (29.4%), and Methanobacteriaceae (22.1%) are prevalent in low moisture samples. Methylobacter (90.0%) of type I methanotrophs are overwhelmingly dominant in high moisture samples, while Methylocystis (53.3%) and Methylomonas (42.2%) belonging to types II and I methanotrophs are the predominant groups in low moisture samples. Furthermore, qPCR analysis revealed that the abundance of methanogens and methanotrophs were higher in high moisture samples than that in low moisture samples. Overall, this comparative study between wetlands controlled by two different water regimes on the Qinghai-Tibetan Plateau provides fundamental data for further research on microbial functions within extreme ecosystems.
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Affiliation(s)
- Hongpeng Cui
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, China.,School of Marine Sciences, China University of Geosciences, Beijing, 100083, China
| | - Xin Su
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, China. .,School of Marine Sciences, China University of Geosciences, Beijing, 100083, China.
| | - Shiping Wei
- School of Marine Sciences, China University of Geosciences, Beijing, 100083, China
| | - Youhai Zhu
- Oil and Gas Survey, China Geological Survey, Beijing, 100029, China
| | - Zhenquan Lu
- Oil and Gas Survey, China Geological Survey, Beijing, 100029, China
| | - Yanfa Wang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, China.,School of Marine Sciences, China University of Geosciences, Beijing, 100083, China
| | - Yuejiao Li
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, China.,School of Marine Sciences, China University of Geosciences, Beijing, 100083, China
| | - Hui Liu
- Oil and Gas Survey, China Geological Survey, Beijing, 100029, China
| | - Shuai Zhang
- Oil and Gas Survey, China Geological Survey, Beijing, 100029, China
| | - Shouji Pang
- Oil and Gas Survey, China Geological Survey, Beijing, 100029, China
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Mei J, Zhen G, Zhao Y. Bio-oxidation of Escape Methane from Landfill Using Leachate-Modified Aged Refuse. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2015. [DOI: 10.1007/s13369-015-1966-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ziyang L, Luochun W, Nanwen Z, Youcai Z. Martial recycling from renewable landfill and associated risks: A review. CHEMOSPHERE 2015; 131:91-103. [PMID: 25800380 DOI: 10.1016/j.chemosphere.2015.02.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 02/04/2015] [Accepted: 02/14/2015] [Indexed: 06/04/2023]
Abstract
Landfill is the dominant disposal choice for the non-classified waste, which results in the stockpile of materials after a long term stabilization process. A novel landfill, namely renewable landfill (RL), is developed and applied as a strategy to recycle the residual materials and reuse the land occupation, aim to reduce the inherent problems of large land occupied, materials wasted and long-term pollutants released in the conventional landfill. The principle means of RL is to accelerate the waste biodegradation process in the initial period, recover the various material resources disposal and extend the landfill volume for waste re-landfilling after waste stabilized. The residual material available and risk assessment, the methodology of landfill excavation, the potential utilization routes for different materials, and the reclamation options for the unsanitary landfill are proposed, and the integrated beneficial impacts are identified finally from the economic, social and environmental perspectives. RL could be draw as the future reservoirs for resource extraction.
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Affiliation(s)
- Lou Ziyang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Wang Luochun
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Zhu Nanwen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhao Youcai
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
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Li H, Chi Z, Lu W, Wang H. Sensitivity of methanotrophic community structure, abundance, and gene expression to CH4 and O2 in simulated landfill biocover soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2014; 184:347-353. [PMID: 24095811 DOI: 10.1016/j.envpol.2013.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 08/27/2013] [Accepted: 09/01/2013] [Indexed: 06/02/2023]
Abstract
Pressure on mitigating CH4 emission in landfill requires better understanding of methanotrophs in landfill biocovers. Most previous studies focused on CH4 as the sole substrate. This study aims to understand the sensitivity of methanotrophs to both substrates CH4 and O2 concentrations in landfill biocovers. The estimated CH4 oxidation rates (4.66-98.7 × 10(-16) mol cell(-1) h(-1)) were evidently higher than the previous reports, suggesting that activity of methanotrophs was enhanced with both the increasing of O2 and CH4 concentrations. Denaturing gradient gel electrophoresis based on the amplification of pmoA genes suggested that methanotrophs were more sensitive to CH4 than O2. Quantification of methanotrophs using pmoA- and mmoX-targeted real-time polymerase chain reaction showed that Mbac and Mcoc as well as Mcys groups were significantly dominant. Mbac group with pmoA gene transcription was dominant. Results indicate that CH4 mitigation would have higher potential by increasing O2 at appropriate CH4 concentrations.
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Affiliation(s)
- Huai Li
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Molecular phylogenetic analysis of dominant microbial populations in aged refuse. World J Microbiol Biotechnol 2013; 30:1037-45. [DOI: 10.1007/s11274-013-1522-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 10/10/2013] [Indexed: 10/26/2022]
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Chiemchaisri W, Chiemchaisri C, Boonchaiyuttasak J. Utilization of stabilized wastes for reducing methane emission from municipal solid waste disposal. BIORESOURCE TECHNOLOGY 2013; 141:199-204. [PMID: 23562177 DOI: 10.1016/j.biortech.2013.03.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 06/02/2023]
Abstract
Stabilized solid wastes were utilized to mitigate methane emission from the landfill. Loose texture of plastic wastes encouraged air diffusion from the soil surface whereas fine organic fraction has good water holding capacity and nutrients to stimulate methane oxidation reaction. Biological methane oxidation capacity in stabilized waste layer was found to be up to 34.1 g/m(3)d. Microbial activity test revealed methanotrophic activities of plastic and degraded organic wastes were in the same order. The mixture of plastic and fine degraded organic waste matrix provided sufficient porosity for oxygen transfer and supported the growth of methanotrophs throughout 0.8m depth of waste layer. Fluorescent in situ hybridization (FISH) analysis confirmed the presence of methanotrophs and their population was found varied along waste depth.
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Affiliation(s)
- Wilai Chiemchaisri
- Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok 10900, Thailand
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Han ZY, Liu D, Li QB. A removal mechanism for organics and nitrogen in treating leachate using a semi-aerobic aged refuse biofilter. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2013; 114:336-342. [PMID: 23137915 DOI: 10.1016/j.jenvman.2012.10.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 10/17/2012] [Accepted: 10/19/2012] [Indexed: 06/01/2023]
Abstract
A removing mechanism for organics and nitrogen using a semi-aerobic aged refuse biofilter (SAARB) was evaluated based on the space structure, the aged refuse conformation and characteristics, as well as the degradation theories of organic matter and nitrogen-based substances, which could provide a fundamental theory to more effectively treat organic matter and nitrogen-based pollutants in leachate. The experimental results indicated that the average removal rate of chemical oxygen demand and total nitrogen reached 96.61 and 95.46%, respectively. The aerobic-anoxic-anaerobic zones appeared alternately in both the space structure and the granule conformation inside of the SAARB, which promoted various physical, chemical and biological reactions. Most biodegradable organic matter was converted to CO(2) and CH(4). The average CO(2) release rate was 1.567 L/(h m(2)) in the winter and 1.467 L/(h m(2)) in the summer during a single-period experiment. The average CH(4) release rate was 0.303 L/(h m(2)) in the summer; however, it could not be detected in the winter. Moreover, the nitrogen-based pollutants were mostly converted to N(2) and N(2)O through denitrification. Some of the refractory organic matter and nitrogen-based pollutants were likely adsorbed by the aged refuse and biodegraded more slowly. The adsorption rate of biologically degradable matter (BDM) was 0.624 g/(kg d) during the first 40 weeks and the largest absorbance of total nitrogen (TN) was about 7.0 g/kg during this experiment. Therefore, the SAARB can maintain stable and highly efficient environment for removing organic matter and nitrogen-based pollutants.
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Affiliation(s)
- Zhi-Yong Han
- Biogas Institute of Ministry of Agriculture, Section 4-13, Renmin Nanlu, Chengdu 610041, Sichuan, China.
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Chi Z, Lu W, Mou Z, Wang H, Long Y, Duan Z. Effect of biocover equipped with a novel passive air diffusion system on microbial methane oxidation and community of methanotrophs. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2012; 62:278-286. [PMID: 22482286 DOI: 10.1080/10473289.2011.647236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A novel biocover with passive air diffusion system (PADS) was designed in this study. Its effect on landfill gas components in the macrocosms of simulated biocover systems was also investigated. The results show that O2 concentration increased in the whole profile of the macrocosms equipped with PADS. When simulated landfill gas (SLFG) flow rate was no more than 40 mL min(-1), the methane oxidation rate was 100%. The highest CH4 oxidation capacity reached to 31.34 mol m(-3) day(-1). Molecular microbiology analysis of the soil samples taken from the above macrocosm showed that the growth of type I methanotrophs was enhanced, attributable to enhanced air diffusion and distribution, whereas the microbial diversity and population density of type II methanotrophs were not so affected, as evidenced by the absence of any difference between the biocover equipped with PADS and that of the control. According to a phylogenic analysis, Methylobacter Methylosarcinafor type I, and Methylocystis, Methylosinus for type II, were the most prevalent species in the macrocosm with PADS.
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Affiliation(s)
- Zifang Chi
- School of Environment, Tsinghua University, Beijing, China
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