Method for producing alcohol by solid fermentation of stalks

Abstract

A process for preparing alcohol from straw and stalk by solid fermentation includes cutting, pulverizing, steam exploding under 1.2-1.4 MPa for 5-7 min, adding cellulase, inoculating high-temp resistant yeast, and fermenting at 45 deg.C for 24 hr. Its dregs can be treated further to become feed.

Description

technical field [0001] The process relates to a method for producing alcohol by using straw as a raw material, in particular to a method for producing fuel alcohol by solid-state fermentation using straw as a raw material. Background technique [0002] my country is a large agricultural production country, with nearly 600 million tons of waste straw of various crops every year, rich in resources and low in price. Theoretically, there is no difficulty in producing fuel ethanol by fermenting cellulosic biomass, but industrial production cannot be implemented for a long time. The essence of this problem is that it is difficult to pass the economic cost and there is no high-efficiency process condition. The biggest issues facing my country's alcohol industry today are raw materials, cost and pollution. The fundamental way to solve the problem of fermenting alcohol raw materials is to use fiber raw materials instead of grain; combine alcohol production with feed production; use ...

AI Technical Summary

Problems solved by technology

At present, the research on the conversion of fermented cellulosic biomass to ethanol is still far from the actual application. There are many reasons for this problem, mainly in the high energy consumption of the pretreatment of cellulosic raw materials; the high production cost of cellulase , the enzyme activity is low; the optimal temperature of cellulose enzymolysis and yeast fermentation is not coordinated, and the fermentation process is not yet mature; the product concentration is low, resulting in high product recovery costs

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