Effect of biocover equipped with a novel passive air diffusion system on microbial methane oxidation and community of methanotrophs.

Zifang Chi, Wenjing Lu, Zishen Mou, Hongtao Wang, Yuyang Long, Zhenhan Duan

Research output: Contribution to journalJournal articleResearchpeer-review

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.
Original languageEnglish
JournalJournal of the Air and Waste Management Association
Volume62
Issue number3
Pages (from-to)278-286
Number of pages9
ISSN1047-3289
DOIs
Publication statusPublished - 2012
Externally publishedYes

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