Although in recent years, the country has attached increasing importance to waste incineration for power generation, and the relative proportion of sanitary landfills in China has been declining, there is still a regional and structural demand. The biogas digester has the function of methane recovery, reducing methane emissions; Replacing coal and reducing carbon dioxide emissions. The domestic rural biogas resources are abundant, and the development of biogas resource recovery projects not only improves the rural living environment, but also provides renewable energy for rural areas to reduce carbon emissions.