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US 2009/0215127 A1Published application
ph Adjustment Free System For Producing Fermentable Sugars and Alcohol
AssigneeDanisco US Inc., Genencor Division
InventorsSuzanne Breneman, Brad A. Paulson, Vivek Sharma, Jayarama K. Shetty
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Abstract
The present invention relates to a process for producing downstream products, such as fermentable sugars (e.g., glucose) and alcohols (e.g., ethanol) from starch-containing material (e.g., grain) without a pH adjustment before or after the starch liquefaction step.
Claims18
A method of processing starch comprising a liquefaction step without a pH adjustment.
A method of producing fermentable sugar from starch comprising the steps:
- (a) mixing starch with water and thin stillage to obtain a slurry,
- (b) treating the slurry with a phytase,
- (c) liquefying the starch,
- (d) adding an alpha-amylase, and
- (e) saccharifying the liquefied starch to obtain fermentable sugars, wherein a pH adjustment is not performed during any of the steps (a), (b), (c), (d), or (e).
2 more elements
A method of producing an alcohol from starch comprising the steps:
- (a) mixing starch with water and thin stillage to obtain a slurry,
- (b) treating the slurry with a phytase,
- (c) liquefying the starch,
- (d) adding an alpha-amylase,
- (e) saccharifying the liquefied starch to obtain fermentable sugars, and
- (f) fermenting the fermentable sugars using a fermenting microorganism to obtain an alcohol, wherein a pH adjustment is not performed during any of the steps (a), (b), (c), (d), (e), or (f).
3 more elements
Dependencies are inferred from the claim text.