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US 8,772,001 B2Granted
Alcohol product processes
AssigneeNovozymes A/S
InventorsHans Sejr Olsen, Sven Pedersen, Rikke Monica Festersen
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Abstract
Processes for production of an alcohol product from granular starch comprising a pre-treatment at an elevated temperature below the initial gelatinization temperature of the granular starch followed by simultaneous saccharification and fermentation, and optionally recovery of ethanol, are described.
Claims30
A process for production of an alcohol product comprising the sequential steps of:
- (a) holding a slurry comprising water and granular starch in the presence of an acid alpha-amylase and a glucoamylase at a temperature of 0° C. to 20° C. below the initial gelatinization temperature of the granular starch for a period between 5 minutes and 12 hours, and
- (b) fermenting the slurry in the presence of an acid alpha-amylase, a glucoamylase and a yeast at a temperature between 10° C. and 35° C. to produce the alcohol product,
- wherein step (a) is performed in the presence of a cellulase and a xylanase.
Dependencies are inferred from the claim text.