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http://dx.doi.org/10.4014/mbl.1708.08004

Field Application of Biocovers in Landfills for Methane Mitigation  

Jung, Hyekyeng (Department of Environmental Science and Engineering, Ewha Womans University)
Yun, Jeonghee (Department of Environmental Science and Engineering, Ewha Womans University)
Oh, Kyung Cheol (Green Environmental Complex Center)
Jeon, Jun-Min (Green Environmental Complex Center)
Ryu, Hee-Wook (Department of Chemical Engineering, Soongsil University)
Cho, Kyung-Suk (Department of Environmental Science and Engineering, Ewha Womans University)
Publication Information
Microbiology and Biotechnology Letters / v.45, no.4, 2017 , pp. 322-329 More about this Journal
Abstract
Two pilot-scale biocovers (PBCs) were installed in a landfill, and the methane ($CH_4$) concentrations at their inlets and outlets were monitored for 240 days to evaluate the methane removability. Consequently, the packing materials were sampled from the PBCs, and their potential $CH_4$ oxidizing abilities were evaluated in serum vials. The $CH_4$ concentration at the inlet of the biocovers was observed to be in the range of 23.7-47.9% (average = 41.3%, median = 42.6%). In PBC1, where a mixture of soil, earthworm cast, and compost (7:2:1, v/v) was employed as the packing material, the $CH_4$ removal efficiency was evaluated to be between 60.7-85.5%. In PBC2, which was filled with a mixture of soil, earthworm cast, perlite, and compost (4:2:3:1, v/v), the removal efficiency was evaluated to be between 29.2-78.5%. Although the packing materials had an excellent $CH_4$ oxidizing potential (average oxidation rate for $CH_4=180-199{\mu}g\;CH_4{\cdot}g\;packing\;material^{-1}{\cdot}h^{-1}$), $CH_4$ removal efficiency in PBC1 and PBC2 decreased to the range of 0-30% once the packing materials in the PBCs were clogged and channeled. Furthermore, seasonal effects exhibited no significant differences in the $CH_4$ removal efficiency of the biocovers. The results of this study can be used to design and operate real-scale biocovers in landfills to mitigate $CH_4$ buildup.
Keywords
Landfill; methane; mitigation; biocover; methanotroph;
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Times Cited By KSCI : 5  (Citation Analysis)
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