| 摘要 |
<p>The invention relates to a process for producing ethanol from raw materials, that contain fermentable sugars or constituents 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) saccharification of the liquefied mash in the presence of a glucoamylase to obtain hydrolysed 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.</p> |
