Process for producing ethanol

Details Process for producing ethanol Process for producing ethanol

C - Chemistry, Metallurgy

12

N

C12N 9/62 (2006.01) C12P 7/06 (2006.01)

Patent

CA 2102896

The invention relates to a process for producing ethanol from raw materials, that contain fermentable sugars or constitu- ents which can be converted into sugars, comprising the steps of: (a) liquefaction of the raw materials in the presence of an alpha- amylase to obtain liquefied mash, (b) saccharificatiott of the liquefied mash in the presence of a glucoamylase to obtain hydro- lysed starch and sugars, (c) fermentation of the hydrolysed starch and sugars by yeast to obtain ethanol, and (d) recovering the obtained ethanol, a fungal protease being introduced to the liquefied mash during the saccharification and/or to the hydrolysed starch and sugars during the fermentation. The invention relates also to a composition containing a glucoamylase and an acid fungal protease.

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