Microorganism compound microbial inoculums capable of efficiently degrading straw lignin

Abstract

The invention provides microorganism compound microbial inoculums capable of efficiently degrading straw lignin. Floras achieve mutualistic symbiosis and synergistic interaction. In a straw fermentation process, three enzymes relating to the degradation of the lignin can be secreted at the same time; the activities of laccase, lignin peroxidase and manganese peroxidase are respectively 23.56 U / g,23.02 U / g and 21.74 U / g biomass; the lignin content of the fermented corn straws is reduced by 60.21 percent, and loss of sugar such as celluloses and hemicelluloses is avoided; the conversion rate ofthe celluloses in the pretreated corn straws is greater than that of non-treated corn straws by 142.14 percent; a screened compound bacterial strain is high in lignin degradation capacity, and the industrial utilization efficiency of the straws pretreated by the bacterial strain is obviously improved. The research provides a new pretreatment way for enzymolysis saccharification of lignocellulosesin the straws.

Description

technical field [0001] The invention relates to a microbial compound bacterial agent for efficiently degrading straw lignin, which belongs to the intensive agricultural production technology, and is specially used for degrading waste corn straws to produce organic fertilizers and realize resource utilization of organic wastes. Background technique [0002] The shortage of chemical energy and the increasingly serious environmental pollution make people constantly seek renewable green energy. As a carbon-neutral green energy, lignocellulose has become a good green candidate resource because of its abundant, easy-to-obtain and low-cost advantages. Sugar platform-based biorefinery technology is an effective way to utilize lignocellulose. This process mainly converts corn stalks, wheat straw and other lignocellulosic resources into polysaccharides, and then continues to convert polysaccharides into other bio-based products through biological fermentation. Among them, the annual...

AI Technical Summary

Problems solved by technology

Physical and chemical methods can reduce the wood content by about 50%, but these two methods are costly and cause secondary pollution

Microbial methods have become a research hotspot due to their simple operation, low cost and good environmental safety. However, many microorganisms can only secrete a few enzymes that degrade lignin or the enzyme activity is not high, resulting in a low lignin degradation rate and relatively low Less retained cellulose