Method for producing alcohol by solid fermentation of stalks

A technology for solid-state fermentation and straw, applied in fermentation and other directions, can solve the problems of high energy consumption of cellulosic raw material pretreatment, high production cost of cellulase, and immature fermentation process, so as to change production conditions and optimize fermentation process. Route, effect of shortening fermentation time

Inactive Publication Date: 2003-10-29
CHINA AGRI UNIV
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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

Method used

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  • Method for producing alcohol by solid fermentation of stalks
  • Method for producing alcohol by solid fermentation of stalks
  • Method for producing alcohol by solid fermentation of stalks

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specific Embodiment approach approach 1

[0026] Specific implementation plan Option 1: if figure 1 , figure 2 as shown,

[0027] (1) Knead the straw with a kneading cutter and coarsely crush it to 20 mesh; pour the crushed straw into the reactor of the blasting device, feed saturated water vapor, increase the pressure to 1.2MPa, start timing, and react for 5 minutes Lower the valve and recycle the straw into the receiver;

[0028] (2) Trichoderma konshii is inoculated into the slant medium and cultivated until the mycelium grows vigorously, scraping a few rings of spores from the slant and inserting them into sterile water with glass beads, shaking, and dispersing the spores; the concentration of the spore suspension is 107 / mL ;

[0029] (3) Add straw powder and bran, water, ammonium sulfate in container; Make straw powder and bran weight ratio be 1: 1, solid-liquid weight ratio be 1: 3, ammonium sulfate addition is 2% of gross weight , mix evenly, sterilize, inoculate a spore suspension with a total weight of 5...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/08
Inventor 孙君社李雪石坚钟桂芳董秀芹
Owner CHINA AGRI UNIV
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