Cellulose biomass raw material pretreatment method

摘要

Provided is a cellulosic biomass raw material pretreatment method capable of dissociating lignin from a cellulosic biomass raw material, reducing the molecular weight of hemicellulose, and reducing the crystallinity of cellulose with a small energy without using a large apparatus. The cellulosic biomass raw material and water are continuously supplied between a pair of grindstones 2 and 3 arranged facing each other at a predetermined interval, the grindstone 2 is fixed, and the grindstone 3 is rotated. The cellulosic biomass raw material is ground. The supply amount of the water is controlled so that the temperature of the cellulosic biomass raw material to be ground is in the range of 50 to 100 ° C. The water supply amount is controlled by measuring the temperature of the cellulosic biomass raw material to be ground and performing feedback control based on the temperature. The cellulosic biomass raw material is rice straw.