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.

Links

Aggregator Full Text

Authors

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

Institution

School of Environment, Tsinghua University, Beijing, China.

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