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Method for preprocessing biomass

A biomass and pretreatment technology, applied in the fields of biofuels, halogenated silicon compounds, fermentation, etc., can solve the problems of serious waste water pollution, high cost of steam explosion, complex products, etc., and achieve low cost, easy hydrolysis, and high yield. Effect

Inactive Publication Date: 2006-08-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline pretreatment can remove lignin, but the wastewater is seriously polluted. Acid method can remove hemicellulose, but it is easy to produce furan, small molecular acid and other substances that inhibit the growth of yeast. The steam explosion method has high cost and complicated products.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0016] Cut and pulverize the wheat straw into pieces smaller than 0.5cm, put it into a high-temperature-resistant plastic barrel for compaction, add 1:1-1.5 (V / V) of 40% (V / V) hydrofluoric acid, and put Put the plastic bucket into a boiling water bath equipped with a gas recovery pipeline to heat, and stir while heating until the straw turns transparent and the cellulose arranged in parallel can be seen, then stop heating, take out the cellulose, rinse or air dry Then put it into another plastic bucket, and then carry out the enzymatic hydrolysis of cellulose until the hydrolysis of cellulose is complete.

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Abstract

The present invention relates to a method for pretreating biomass instead of sodium hydroxide, fulfuric acid and vapor explosion. Said invention is characterized by that it adopts the following steps: pulverizing cellulose-live biomasses of crop straw and stalk, grass and wood, etc., removing impurity, making acid hydrolysis, separating and extracting cellulose, using cellulose to hydrolyze cellulose, using saccharomycetes to make fermentation to produce ethyl alcohol and recover silicon fluoride. The above-mentioned acid is hydrofluoric acid.

Description

1. Technical field: [0001] The invention relates to a biomass energy method, in particular to a biomass pretreatment method. 2. Background technology: [0002] Currently, microorganisms capable of directly breaking down lignin and hemicellulose are slow to act. Cellulase could not effectively hydrolyze the straw directly. The pretreatment of removing lignin and hemicellulose in straw by heating, adding inorganic acid, alkali, etc. is the key to the production of ethanol by biomass fermentation. Alkaline pretreatment can remove lignin, but the wastewater is seriously polluted. Acid method can remove hemicellulose, but it is easy to produce furan, small molecular acid and other substances that inhibit the growth of yeast. The steam explosion method has high cost and complex products. Finding a pretreatment method that is cheap, does not increase sodium, sulfur and other chromogenic elements, and does not require high pressure and high temperature conditions will undoubtedly ...

Claims

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Application Information

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IPC IPC(8): C12P7/10C01B33/08
CPCY02E50/16Y02E50/10
Inventor 王联结
Owner SHAANXI UNIV OF SCI & TECH
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