Patent ID: 9695549
Date: 2017-07-04
CPC Classifications: C12P,D21C,Y02E

Claim:
1. A process for producing a fermentation product, comprising: (a) subjecting a lignocellulose-containing material to a pretreatment; (b) washing the pretreated lignocellulose-containing material in an aqueous washing solution; (c) separating the pretreated and washed lignocellulose-containing material from the used aqueous washing solution; (d) removing an enzyme inhibitor and an inhibitor of a fermenting organism from the used aqueous washing solution obtained in step (c) by contacting the used aqueous washing solution obtained in step (c) with a column comprising a resin directly after washing and separating, and recycling the used aqueous washing solution with less enzyme inhibitor and less inhibitor of a fermenting organism to step (b); (e) enzymatically hydrolyzing the separated lignocellulose-containing material obtained in step (c) to produce a hydrolyzate comprising fermentable sugars; (f) continuously repeating steps (a) to (e); and (g) fermenting the hydrolyzate produced in step (e) with the fermenting organism to produce the fermentation product.