In order to produce biogas normally, it is necessary to create a good condition for microorganisms to survive and reproduce. Biogas digesters must meet a variety of conditions. First of all, the methane tank should be closed. The fermentation of organic matter into biogas is the result of the activities of many kinds of anaerobic bacteria. In the construction of biogas digesters should pay attention to the isolation of air, airtight, no seepage. Secondly, the biogas tank to maintain 20 to 40 DEG C, because the gas production rate is usually the highest. Third, there must be enough nutrients to the marsh. In order to survive and reproduce, microorganisms must absorb nutrients from the fermentation material. In the fermentation of biogas digesters, human and animal manure can provide nitrogen, crop stalks and other cellulose can provide carbon. Fourth, the fermentation of raw materials to contain the right amount of water, the general requirements of biogas digesters in the fermentation of raw materials containing about 80% of water, too much or too little on the adverse gas production. Fifth, the pH value of biogas digesters is generally controlled at 7 ~ 8.5.
Methane is a kind of organic material, which can be used to isolate the air (such as biogas digester) under the conditions of temperature, humidity and acidity. It contains a small amount of hydrogen sulfide, so slightly smelly. Fermentation is a complex biochemical change. The reaction is divided into two stages: (1) microbial complex organic matter in carbohydrate, fat and protein degradation into simple substances, such as fatty acids, alcohols, aldehydes, carbon dioxide, ammonia, hydrogen and hydrogen sulfide. (2) the role of methane bacteria in the conversion of simple substances into methane.
Biogas is a kind of combustible gas produced by the fermentation of microorganisms under anaerobic conditions. As the gas was first found in the marsh, it was called methane. Livestock and poultry manure, straw, sewage and other organic substances in the sealed digesters, under anaerobic fermentation conditions, that is, a large variety of biogas fermentation microbial decomposition transformation, resulting in biogas. Biogas is a mixture of gases that can burn. Biogas is a combustible gas produced by anaerobic digestion of organic matter.
