Method of producing sugar liquid
AssigneeToray Industries, Inc.
InventorsHiroyuki Kurihara, Hiroko Ishizuka, Katsushige Yamada
Life of this patent
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Abstract
A sugar liquid or solid sugar is derived from cellulose-containing biomass or blackstrap molasses, wherein content of one or more free amino acids selected from the group consisting of serine, threonine, asparagine, aspartic acid, glutamine, glutamic acid, proline, phenyl alanine, lysine, and histidine, which are impurities, is below the limit of detection.
Claims8
A sugar liquid or solid sugar derived from cellulose-containing biomass or blackstrap molasses, wherein content of one or more free amino acids selected from the group consisting of serine, threonine, asparagine, aspartic acid, glutamine, glutamic acid, proline, phenyl alanine, lysine, and histidine, which are impurities, is below the limit of detection.
A method of producing a chemical substance, comprising:
- (a) decomposing one or more fermentation inhibitor(s) contained in a sugar aqueous solution obtained from biomass with a microorganism incapable of utilizing glucose and/or xylose or a crude enzyme extract obtained from the microorganism, to obtain a sugar liquid having a reduced fermentation inhibitory activity compared to the sugar aqueous solution;
- (b) subjecting the sugar liquid obtained in step (a) to membrane concentration and/or evaporation concentration to increase sugar concentration;
- and
- (c) culturing a microorganism with the sugar liquid obtained in step (b) as a fermentation raw material to convert a sugar into the chemical substance,
- wherein the one or more fermentation inhibitor(s) are selected from the group consisting of coumaric acid, coumaramide, ferulic acid, ferulamide, vanillin, vanillic acid, acetovanillone, furfural, and β-hydroxymethylfurfural, and
- the microorganism incapable of utilizing glucose and/or xylose is a Delftia microorganism (Delftia sp.).
Dependencies are inferred from the claim text.