The study for Shanxi Province household biogas digester at overwintering stage.

In order to effectively solve the short cycle problem,research the use of biogas digesters in rural areas in Shanxi Province.Combining the Shanxi rural realities and improved the structural form of the traditional biogas digester.Through adding pretreatment tank to provide heat for biogas digester.And add thermal insulation materials for digesters wall,inlet and outlet to achieve the purpose of increasing biogas pool temperature in winter.Take the Yulin City for example,through the theoretical calculations and experimental,proved the biogas yield of biogas digesters can be achieved above 0.1 m3/(m3·d)in winter minimum temperatures,and the biogas from a 6～8 m3 digester could satisfy the daily energy requirements of a common household.