Biomass pretreatment method

Abstract

The invention relates to a biomass pretreatment method which can be a substitute for alkali, acid and steam explosion and reduce the cost and environmental pollution. The invention adopts the technical scheme that: crushing the biomass into powder, sterilizing, cooling, then adding proteinase, hydrolyzing protein in the biomass into free amino acids, and then using other methods to hydrolyze cellulose and hemicellulose into monose for alcoholic fermentation. The proteinase comprises acid protease, alkali protease or collagenase and the like. The biomass comprises crop straws, grass, wood or fibrous plants.

Description

1. Technical field:

[0001] The invention relates to a biomass energy method, in particular to a biomass pretreatment method, which is a method for pretreating crop stalks with protease. 2. Background technology:

[0002] Current microorganisms that can directly break down lignin and hemicellulose are slow to act. The direct use of cellulase cannot effectively hydrolyze 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 and small molecule acids that inhibit the growth of yeast. The steam explosion method has high cost, complex products, and tar formation. .

[0003] Finding a pretreatment method that is cheap, does not increase sodium, sulfur and other chromogenic elements, and does n...