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Long-term performance and bacterial community dynamics in biocovers for mitigating methane and malodorous gases

Title
Long-term performance and bacterial community dynamics in biocovers for mitigating methane and malodorous gases
Authors
Lee, Eun-HeeMoon, Kyung-EunCho, Kyung-Suk
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2017
Journal Title
JOURNAL OF BIOTECHNOLOGY
ISSN
0168-1656JCR Link1873-4863JCR Link
Citation
vol. 242, pp. 1 - 10
Keywords
MethaneOdorsBiocoverMethanotrophCommunity structure
Publisher
ELSEVIER SCIENCE BV
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The long-term performance of lab-scale biocovers for the simulation of engineered landfill cover soils was evaluated. Methane (CH4), trimethylamine (TMA), and dimethyl sulfide (DMS) were introduced into the biocovers as landfill gases for 134 days and the removal performance was evaluated. The biocover systems were capable of simultaneously removing methane, TMA, and DMS. Methane was mostly eliminated in the top layer of the systems, while TMA and DMS were removed in the bottom layer. Overall, the methane removal capacity and efficiency were 224.8 +/- 55.6 g-CH4 m(-2) d(-1) and 66.6 +/- 12.8%, respectively, whereas 100% removal efficiencies of both TMA and DMS were achieved. Using quantitative PCR and pyrosequencing assay, the bacterial and methanotrophic communities in the top and bottom layers were analyzed along With the removal performance of landfill gases in the biocovers. The top and bottom soil layers possessed distinct communities from the original inoculum, but their structure dynamics were different from each other. While the structures of the bacterial and methanotrophic communities showed little change in the top layer, both communities in the bottom layer were considerably shifted by adding TMA and DMA. These findings provide information that can extend the understanding of full-scale biocover performance in landfills. (C) 2016 Elsevier B.V. All rights reserved.
DOI
10.1016/j.jbiotec.2016.12.007
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엘텍공과대학 > 환경공학전공 > Journal papers
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