Patent ID: 8409640

Claim:
A method of fermenting corn into a fermentation product comprising the steps of: dry fractionating the corn into a fractionated corn comprising a fiber component, a germ component and an endosperm component; inducing cavitation or disruption in the fractionated corn; separating at least a portion of the germ component and at least a portion of the fiber component of the fractionated corn so that the fractionated corn substantially comprises the endosperm component; simultaneously saccharifying and fermenting the fractionated corn substantially comprising the endosperm component in an aqueous composition which further comprises an acid stable fungal alpha amylase, a yeast and a glucoamylase under conditions to form glucose; subsequently fermenting the glucose to the fermentation product, wherein the fermentation product comprises at least 18 volume percent ethanol, while maintaining a glucose concentration of less than 2 weight percent in the aqueous composition during saccharification and fermentation.