A microbial agent for pretreatment of straw and manure biogas fermentation

Abstract

The invention discloses a microbial agent for pretreatment of straws and manure biogas. The microbial agent jointly comprises the following strains: 2-8*10<10>cfu / g of Penicillium glaucum, 2-8*10<10>cfu / g of Rhizopus oryzae, 2-8*10<10>cfu / g of Phanerochaete chrysosporium, 2-8*10<10>cfu / g of Aspergillus flavus and 2-8*10<10>cfu / g of Spirillospora. By virtue of the microbial agent, the mixed anaerobic fermentation process of straws and manure can be promoted, the fermentation period is shortened, the biodegradation of organic materials can be accelerated, and a preparation method of the microbial agent is simple and easily implemented, the content of flora in feedstock per unit is large and the activity is high. The microbial agent can be used for the fermentation of different manure and straw raw materials in biogas fermentation enterprises and thus the harmless, reduction and resource utilization of manure and straws are achieved.

Description

technical field [0001] The invention belongs to the technical field of fermentation pretreatment bacterial agents for agricultural waste, and in particular relates to a microbial bacterial agent for fermenting pretreatment of straw and feces biogas. Background technique [0002] At present, my country's annual output of straw is about 700 million tons, and the excrement discharge of livestock and poultry farming is about 1.73 billion tons. A large number of agricultural wastes are not used rationally, and most of them are directly burned or discarded in fields and rivers, which not only causes waste of resources but also seriously damages the ecological environment. Studies have shown that the potential of fermentation gas production using straw as raw material is about 0.45m 3 / (Kg·Ts), which is equivalent to the fermentation rate of feces, and its gas production potential is very huge. Using straw as raw material to ferment biogas not only solves the problem of energy sh...

AI Technical Summary

Problems solved by technology

There are big problems in this method: First, these single bacteria do have certain functions when cultured in the laboratory, but it is difficult to achieve the desired effect under the complex conditions of fermentation

This is because many single strains cannot grow and reproduce in the actual environment or are susceptible to the growth of other microorganisms; secondly, because there are many interactions between different microbial groups, the strains screened in the laboratory have certain functions. A single bacterium does not fully prove that it has the same effect in a complex group; third, some microbial biogas fermentation agents simply mix the fermentation strains together, and the antagonism between the strains is not thoroughly studied , which leads to the microbial strains in the fermentation process due to the antagonism between the strains and can not achieve the desired effect; the fourth, can not effectively use the role of various enzymes produced by microorganisms

In the degradation process of organic matter, the degradation of enzymes is very critical, therefore, microbial agents that only contain microorganisms but do not contain enzymes cannot play a greater role

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