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Landfill Methane Biofilters

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Methane, a potent greenhouse gas, is generated in landfills by the anaerobic decomposition of deposited organic waste after oxygen has been depleted. Although net release is mitigated in cover soil by methanotrophs (which oxidise methane and use it as a carbon source) landfills remain a significant anthropogenic source of methane

To mitigate the release of landfill gas containing low methane concentrations, Norfolk County Council are trialling a custom-made methane biofilter. Effectively a large bioreactor containing methanotrophs through which landfill gas can be directed and stripped of methane. This biofilter is designed to harness and improve the methane oxidising potential of resident methanotrophic bacteria.

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