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

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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  • Authors

    Chi Z, Lu W, Mou Z, Wang H, Long Y, Duan Z

    Source

    Journal of the Air & Waste Management Association (1995) 62:3 2012 Mar pg 278-86

    MeSH

    Air
    Air Pollutants
    Biodegradation, Environmental
    Diffusion
    Humans
    Methane
    Methylococcaceae
    Methylocystaceae
    Oxidation-Reduction
    Refuse Disposal
    Soil Microbiology

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22482286