Process for the production of cellulolytic and hemicellulolytic enzymes using distillation residues from the ethanolic fermentation of enzymatic hydrolyzates of (ligno)cellulosic materials

Abstract

A process for producing cellulolytic and/or hemicellulolytic enzymes uses the residue from the ethanolic fermentation of enzymatic hydrolyzates of cellulosic or ligno-cellulosic materials. This process may be integrated into a process for the production of ethanol from cellulosic or ligno-cellulosic materials which comprises the following steps: 1) chemical and/or physical pre-treatment of a cellulosic or ligno-cellulosic substrate; 2) enzymatic hydrolysis of the pre-treated substrate using cellulolytic and/or hemicellulolytic enzymes; 3) ethanolic fermentation, by a suitable alcohologenic microorganism, of the hydrolyzate from step (2) and production of a fermentation must; and 4) separation of the alcohologenic microorganism used in step (3), separation/purification of the ethanol and production of an aqueous phase constituting a residue; and in which said residue serves for the production of the cellulolytic and/or hemicellulolytic enzymes used in step 2).

Dependencies are inferred from the claim text.