The overwintering management of rural household biogas digesters, in general terms, is to “eat the stomach and cover the warm quilt”. The “eat full belly” is to add more ingredients before the winter, and add some cow dung, chicken duck dung, pig dung and other raw materials. Raw materials are pretreated. “Covering a warm quilt” means that the biogas digester should be insulated and protected in time before winter.

I. Simple greenhouses Temporarily there are no open-air biogas digesters in the livestock houses on the ground. Before entering into the winter, simple greenhouses should be built on the biogas digesters and the biogas tanks should be installed inside; or straws or plastic films should be used to cover the biogas digesters. It is necessary to do well as soon as possible with insulation measures such as inlets, outlets, and pressure pools that are in direct contact with the outside world and where the heat is dissipated.

Second, covering greenhouses and solar greenhouses, the construction of the "four in one" garden methane pool system, before entering the winter, we must promptly the top of the greenhouse, covered with plastic film, insulation wintering.

The trinity and solar energy livestock houses are combined to build a “three-in-one” garden biogas digester system. Before entering the winter, the top of the solar livestock and poultry house should be covered in time, covered with plastic film, and insulated for winter.

Fourth, the cover must be covered with the inlet and outlet openings. In the winter, straw must be used to cover at least 5 cm.

Fifth, fill in hot water conditions, supporting the installation of solar water heaters, in the feeding, add some hot water heaters to increase the fermentation of raw materials and the pool temperature.

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