Cold resistant mash gas preparing process

Abstract

The cold resistant mash gas producing process includes the preparation of mash gas material and the preparation of heat raising and heat insulating heating material. The mash gas material is compounded in semi-humid solid state with water content of 22-85 %; and the heat raising and heat insulating heating material set outside the container has water content of 30-85 %. Through normal anaerobic fermentation, great amount of heat is generated to maintain the fermentation at 30-55 deg.c so as to resist cold and generate mash gas at high efficiency. In addition, the present invention can save great amount of water.

Description

technical field

[0001] The invention relates to a method for preparing biogas raw materials and thermal insulation materials, in particular to a cold-resistant biogas preparation method. Background technique

[0002] As a clean new energy, biogas has been popularized and promoted for more than 30 years. It has solved part of the problem of living and cooking energy in rural areas and has a good role in environmental protection, and has been welcomed by farmers. However, at present, most of the traditional biogas digesters are buried in the ground with a dry matter concentration of only 4-6% of the "wet fermentation" method. If the dry matter concentration exceeds 6%, it will cause crusting on the liquid surface inside the biogas digester. The problem is that once crusts appear, the biogas cannot be produced and used normally. At the same time, because a large amount of liquid water is in the underground environment in the cold season, it is consistent with the ground tempera...