This method applies to projects that reduce the methane generated from manure in conventional piggeries, by capturing and combusting biogas that would otherwise be released into the atmosphere. This is achieved by directing piggery manure into an engineered biodigester. In doing so, it converts methane, which has a global warming potential of 21, to carbon dioxide, which has a global warming potential of one.
The project requires installing and operating engineered biodigesters, as well as gas capture and combustion equipment. The methane component of the biogas is combusted using flares, and/or an electricity generation system, and/or a gas boiler. Engineered biodigesters and gas capture and combustion equipment can be installed at existing piggeries or in new piggeries.
The destruction of methane from piggeries using engineered biodigesters method was varied in June 2015. The method must be read together with the methodology determination variation, which provides details on the changes.
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