Functional biocatalyst for biogas fermentation and method for using catalyst for fermentation

Abstract

The invention discloses a functional biocatalyst for biogas fermentation and a method for fermenting using the catalyst. The catalyst comprises 1-3 parts of a microbial composite bacterial agent, 100 parts of hydrolase accelerant and 61-329 parts of mineral nutrient accelerant, wherein the mineral nutrient accelerant is one or more of microcrystalline ground phosphate rock, microcrystalline zeolite powder, microcrystalline calcium carbonate powder, urea, phosphate, bentonite and active carbon. The biogas fermentation method comprises the following steps: performing biogas fermentation by using 350-650 parts of poultry excrement, 100-300 parts of inoculum and 163-430 parts of functional biocatalyst while controlling the moisture content of the poultry excrement at 75-85%; and stirring and mixing for fermentation, wherein the concentration of the whole original feed liquid is 7-12%. In the invention, apart from the supplement of the nutritive elements for biogas fermentation, the effects of deodorization and inhibition of pathogenic microorganisms are realized through the functional complementation effect among the adsorption of an adsorbent, ion exchange, biodegradation and membrane filtration so that the biocatalyst is harmless; and moreover, the preparation technology has the advantages of simple process, easiness in operation, good effect, low investment, no pollution and wide application value.

Description

technical field [0001] The invention belongs to the technical field of biogas fermentation, and relates to a multifunctional biocatalyst containing microcrystalline phosphate rock powder and a method for using the catalyst to carry out biogas fermentation. Background technique [0002] According to a survey conducted by the State Environmental Protection Administration in 2000 on 23 provinces and cities where large-scale livestock and poultry farms are concentrated, in 1995, the total COD discharge of industrial wastewater in the country was 7.6837 million tons, while the waste from livestock and poultry breeding industry The emission converted into COD is 7.286 million tons, which is close to the total COD emission of industrial wastewater in the country. In 1999, the amount of livestock and poultry breeding waste in my country was about 1.9 billion tons, which was 2.4 times that of industrial solid waste. In 2000, the annual production of livestock and poultry manure in C...

AI Technical Summary

Problems solved by technology

For example, (1) The biogas production decreases significantly in the cold season, and the gas production of the same amount of biogas raw materials is often less than one-third of that in summer; (2) The biogas fermentation raw materials cannot be fully decomposed and utilized in the tank, and the actual biogas conversion rate ( raw material gas production rate) is low

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