Article
Environmental Sciences
Somvir Bajar, Anita Singh, C. P. Kaushik, Anubha Kaushik
Summary: Biocovers play a key role in reducing landfill methane emissions, but their efficacy is influenced by landfill environment and biocover characteristics. Research indicates that dumpsite soil may be a good alternative for improving methane bio-oxidation and reducing greenhouse gas emissions in the waste sector.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Multidisciplinary
He Pinjing, Chen JunLan, Shao Liming, Zhang Hua, Lu Fan
Summary: Landfilling is a common method of waste disposal in loess regions, with loess often used as landfill cover soil. This study proposed a method to improve methane removal capacity of loess by amelioration with mature landfill leachate, leading to significant increase in organic matter content and methane-oxidizing bacteria abundance. The methane removal rate of ameliorated loess was significantly higher than that of water-irrigated loess, with potential for achieving carbon neutrality in global loess landfill sites.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Engineering, Environmental
C. Scheutz, Z. Duan, J. Moller, P. Kjeldsen
Summary: A life cycle-based environmental assessment was conducted to evaluate the mitigation of landfill gas emissions using biocover and gas collection with energy utilisation at aging landfills. The study found that biocover and gas collection systems with energy utilisation led to significant environmental improvements compared to the baseline scenario with no emission mitigation action. Scenarios representing biocovers with higher methane oxidation efficiencies were environmentally superior in terms of climate change impact compared to scenarios with longer gas collection and energy utilisation. Combining gas collection with energy utilisation and the subsequent installation of a biocover provided major improvements compared to scenarios with only gas collection and energy utilisation. It was concluded that a biocover, under the given assumptions, is more environmentally appropriate than gas collection and utilisation at aging landfills due to methane emissions escaping through the landfill cover.
Article
Environmental Sciences
Brienne Nelson, Richard G. Zytner, Yohan Dulac, Alexandre R. Cabral
Summary: The study aimed to design, construct, and monitor a fully instrumented pilot-scale PMOB to reduce fugitive methane emissions from a closed landfill in Kitchener, Ontario, now a public park. Factors considered in the design include type of PMOB media, methane loading rates, hydraulic behavior, and ambient temperature. Methane oxidation efficiencies between 73% and 100% were achieved during the monitoring period. Successful mitigation will provide a low-maintenance, high-impact technology that could be adopted by the municipality for abatement of methane emissions at other landfills under its management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Mait Kriipsalu, Mohit Somani, Kaur Pehme, Ottar Tamm, Jaak Truu, Marika Truu, Kaja Orupold
Summary: This study monitored a fully instrumented biocover at a closed landfill in Saaremaa Island, Estonia, to reduce methane emissions. After 10 years of monitoring, changes in methane, carbon dioxide, and temperature were observed. The study found that methane concentration and oxidation process activity varied across the biocover layer at different depths within the landfill. Based on data analysis, the methane oxidation process stabilizes in the biocover within 5-6 years after implementation.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Environmental Sciences
Oday T. Al-Heetimi, Cole J. C. Van De Ven, Paul J. Van Geel, Mohammad T. Rayhani
Summary: Compost-based biocovers are effective in reducing methane emissions from landfills, but their performance under different temperature conditions is not well understood. Experimental and simulation studies found that the methane oxidation rate is influenced by temperature, with lower temperatures leading to a decrease in oxidation rate. However, some oxidation still occurs at low temperatures, and the oxidation capacity can quickly recover when the temperature is increased. Overall, compost-based biocovers can mitigate methane emissions from landfills under different temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Environmental Sciences
Julia Gebert, Marion Huber-Humer, Alexandre R. Cabral
Summary: Landfill methane is the largest global source of greenhouse gas emissions from the solid waste sector. Microbial methane oxidation systems (MMOS) are considered a promising technology. This paper reviews the scientific background and provides guidance on layout and design steps for MMOS.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Proceedings Paper
Architecture
S. Rahim, M. Jeludin, S. Shams, M. H. Isa
Summary: This study aims to explore potential biocovers as alternative landfill covers and evaluate their geotechnical properties for landfill applications. The results showed that adding 25% compost and crushed rice husk, as well as 50% recycled soil to the landfill cover had a significant effect on its compaction, consolidation, and strength properties.
PROCEEDINGS OF 2021 4TH INTERNATIONAL CONFERENCE ON CIVIL ENGINEERING AND ARCHITECTURE
(2022)
Article
Engineering, Environmental
Oday T. T. Al-Heetimi, Cole J. C. van de Ven, Paul J. J. Van Geel, Mohammad T. T. Rayhani
Summary: Biocovers are effective in reducing methane emissions from landfills, with food and yard waste compost materials showing promising results. However, peat moss did not provide suitable conditions for methane oxidation. The study highlights the importance of oxygen penetration depth and gas saturation in determining methane oxidation capacity, and suggests that biocover materials have great potential for reducing methane emissions, especially in older and smaller landfills.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Article
Environmental Sciences
Lei Jiang, Yi-Xuan Chu, Xuan Zhang, Jing Wang, Xiaosong He, Chen-Yang Liu, Ting Chen, Ruo He
Summary: This study investigated the anaerobic oxidation of methane (AOM) activity and communities of methane-oxidizing bacteria in three informal landfills. The AOM rate was highest in the landfill with aeration, and the NO2--N content was positively correlated with the AOM rate. Gamma-Proteobacteria methanotrophs, especially Methylobacter, were abundant in the landfilled waste. The relative abundance of various methanotrophs was positively correlated with the contents of NO2--N in the landfilled waste samples.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Haijie He, Shiyi Gao, Jie Hu, Tie Zhang, Tao Wu, Zhanhong Qiu, Chensheng Zhang, Yaoran Sun, Sailing He
Summary: Field monitoring of methane emissions from landfills is crucial for environmental protection and economic benefits. This study presents an effective method using TDLAS to measure methane emissions, showing a linear relationship between methane concentration and optical signal. In situ testing at a large-scale landfill in China validated the accuracy of the TDLAS method in detecting methane emissions.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Andrew L. Robison, Wilfred M. Wollheim, Clarice R. Perryman, Annie R. Cotter, Jessica E. Mackay, Ruth K. Varner, Paige Clarizia, Jessica G. Ernakovich
Summary: Inland waters, especially small streams, play a significant role in methane emissions to the atmosphere. This study investigates the emission pathways, microbial production and oxidation, and isotopic signature of methane in four lowland headwater streams. The findings suggest that diffusive emissions account for the majority of methane emissions in these streams, and methane oxidation is prevalent, depleting half of the dissolved methane pool. The study proposes a conceptual model of methane production, oxidation, and emission in small streams, highlighting their unique characteristics compared to other aquatic ecosystems.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Environmental
C. Scheutz, A. Kjeld, A. M. Fredenslund
Summary: This study compares methane emissions from five Icelandic landfills and finds that the application of the IPCC FOD model for estimating landfill methane emissions in Iceland is appropriate.
Article
Engineering, Environmental
Jorge Cristobal, Luis Sierra, Maria Margallo, Jan Kannengiesser, Ruben Aldaco, Liselotte Schebek, Angel Irabien
Summary: This study examines the implementation of methane oxidation layer (MOL) as a Clean Development Mechanism (CDM) measure in unclosed coastal landfills in small island developing states. Results show that MOL measure can effectively reduce greenhouse gas emissions, but profitability depends on biomass material and CER prices.
Article
Environmental Sciences
Gustav Pajala, Henrique O. Sawakuchi, David Rudberg, Jonathan Schenk, Anna Sieczko, Magnus Galfalk, David Seekell, Ingrid Sundgren, Nguyen Thanh Duc, Jan Karlsson, David Bastviken
Summary: Lakes contribute a significant amount of global methane emissions, and the role of dissolved molecular oxygen (DO) in regulating these emissions is still unclear.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)