METHOD FOR ENZYMATICALLY PRODUCING BIOETHANOL USING CELLULOSIC BIOMASS AS STARTING MATERIAL

WIPO Patent Application WO/2019/124143

A1

The present invention addresses the problem of providing a method for producing bioethanol using a lignocellulosic biomass as a starting material, wherein the ethanol concentration of a fermented liquid obtained in a fermentation step can be increased and the distillation load can be reduced without requiring any special equipment in solubilizing cellulose contained in the biomass by enzymatic hydrolysis. When hemicellulose is removed from a cellulosic biomass and the resultant solid residue is mixed with an aqueous solution containing a cellulose hydrolytic enzyme in a reaction container, the concentration of ethanol is controlled to 3-6 mass% inclusive. Thus, the growth of miscellaneous microorganisms can be prevented during the hydrolysis of the cellulose and the ethanol concentration can be increased when a saccharified solution is subjected to ethanol fermentation. As a result, the distillation load is reduced. The ethanol added at the hydrolysis can be recovered in the step for distilling the alcohol fermented liquid and then reused.

NISHINO TAKASHI
IZUMI NORIAKI
TAJIRI HIRONORI
TSUJITA SHOJI
ODA ASUKA
MASAMOTO MANABU
WARATANI YUSUKE

PCT/JP2018/045299

June 27, 2019

December 10, 2018

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KAWASAKI HEAVY IND LTD (JP)

C12P7/10; C12P19/02; C12N9/24

WO2017138462A1

2017-08-17

JP2013042727A	2013-03-04
JP2013126395A	2013-06-27
JP2012050376A	2012-03-15
JP2015027285A	2015-02-12
JP2015012857A	2015-01-22
JP2011045277A	2011-03-10

PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)

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