Method for producing sugar liquid

C - Chemistry – Metallurgy – 13 – K

Patent

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C13K 1/02 (2006.01) B01D 71/08 (2006.01) C12S 3/04 (2006.01) C13K 13/00 (2006.01) C12N 1/21 (2006.01) C12N 15/00 (2006.01) C12P 13/00 (2006.01) C12P 19/14 (2006.01)

Patent

CA 2746504

A sugar liquid containing only very small amounts of fermentation-inhibiting substances is produced by a method for producing a sugar liquid using a cellulose-containing biomass as a raw material, the method comprising: (1) a step of hydrolyzing a cellulose-containing biomass to produce an aqueous sugar solution; and (2) a step of filtering the obtained aqueous sugar solution through a nanofiltration membrane and/or reverse osmosis membrane to collect a purified sugar liquid from the feed side, while removing fermentation-inhibiting substances from the permeate side.

L'invention porte sur un procédé pour la fabrication d'un liquide à base de sucre à l'aide d'une biomasse contenant de la cellulose en tant que matière de départ. Du liquide à base de sucre ayant une très faible teneur d'une substance inhibant la fermentation est produit par un procédé comprenant (1) une étape dans laquelle une biomasse contenant de la cellulose est hydrolysée pour produire une solution aqueuse de sucre et (2) une étape dans laquelle la solution aqueuse de sucre ainsi obtenue est filtrée sur une membrane de nanofiltration et/ou une membrane d'osmose inverse, le liquide à base de sucre pur est récupéré du côté rétentat et la matière inhibant la fermentation est enlevée du côté perméat.

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