Fermentation of glucose with recycle of non-fermented...

Details Fermentation of glucose with recycle of non-fermented... Fermentation of glucose with recycle of non-fermented...

C - Chemistry, Metallurgy

12

P

195/4, 260/234.1

C12P 7/06 (2006.01) B01D 3/00 (2006.01) C12P 7/10 (2006.01)

Patent

CA 1190493

- 1 - Abstract A process for producing ethanol is described which includes the steps of: (a) continuously moving a feedstock slurry of starch and acid through a high intensity tubular starch hydrolyzer to produce a hydrolyzate in fluid form containing glucose, (b) fermenting the glucose-containing fluid to form a fermentation product containing ethanol, (c) distilling the fermentation product to separate the ethanol from a distillation residue containing non-fermented carbo- hydrate materials and, (d) recycling at least part of the obtained distillation residue as part of the starch and acid slurry feedstock to the hydrolyzer whereby a substantial portion of the recycled non-fermented carbo- hydrate materials is hydrolyzed together with the starch to a fermentable glucose-containing fluid.

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