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Destruction of methane from piggeries using engineered biodigesters

26 August 2016

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.

Method variations

Section 114 of the Carbon Credits (Carbon Farming Initiative) Act 2011 (the Act) allows for methods to be revised and varied. This is to ensure methods continue to operate as originally intended. Variations to methods are developed and drafted by the Department of the Environment. Information on draft methods and method variations is available on the Department of the Environment’s website.

The Clean Energy Regulator recommends making yourself familiar with proposed method variations relevant to your project should they arise, and how any changes between the original method and the varied method may affect your project plan.

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