METHOD FOR PRODUCING SUGARS FROM HERBACEOUS BIOMASS OR WOODY BIOMASS AND METHOD FOR PRODUCING ETHANOL FROM SUGARS

摘要

PROBLEM TO BE SOLVED: To sufficiently and effectively utilize sugar components contained in herbaceous biomass or woody biomass, the components being utilizable as raw material of ethanol production.SOLUTION: The method comprises: an alkali-treatment step of contacting herbaceous biomass and/or woody biomass with alkali solution; a pH-adjusting step of adding acid to the solution or the slurry after the alkali-treatment step; and an amylase-treatment step of making amylase act on the solution or the slurry after the pH-adjustment and hydrolyzing starch contained in the solution or the slurry.