Being the preprocessing manner which is done in preprocessing manner of enzyme hydrolysis treating the herb type biomath and before the enzyme hydrolysis treating

摘要

PROBLEM TO BE SOLVED: To provide a low-cost pretreatment method for the enzymic hydrolysis of a herbaceous biomass, which is carried out before the enzymic hydrolysis of the herbaceous biomass and by which the pretreatment can be carried out in a short time in good yield with little consumption of energy, and to provide a method for producing ethanol by using the herbaceous biomass as a raw material.;SOLUTION: The pretreatment method for the enzymic hydrolysis treatment of the herbaceous biomass includes a coarsely pulverizing step for coarsely pulverizing the herbaceous biomass raw material in a dry system to an average particle diameter of ≤1 mm, a first finely pulverizing step for preparing a high-concentration mixture having a herbaceous biomass concentration of 10 wt.% and ≤40 wt.% by adding water to the coarsely pulverized herbaceous biomass and finely pulverizing the resultant high-concentration mixture of the herbaceous biomass so that the average particle diameter of the herbaceous biomass may be ≤100 μm, and a second finely pulverizing step for preparing a low-concentration mixture in which the herbaceous biomass concentration is ≥1 wt.% and ≤10 wt.% by adding water to the high-concentration mixture finely pulverized at the first finely pulverizing step, and further finely pulverizing the herbaceous biomass in the low-concentration mixture.;COPYRIGHT: (C)2011,JPO&INPIT