Process for the production of cellulolytic and hemicellulolytic enzymes using distillation residues from the ethanolic fermentation of enzymatic hydrolyzates of (ligno)cellulosic materials
First Claim
1. A process for producing cellulolytic and/or hemicellulolytic enzymes by a cellulolytic microorganism, comprising using the residue from the ethanolic fermentation of enzymatic hydrolyzates of cellulosic or ligno-cellulosic materials.
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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).
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16 Claims
- 1. A process for producing cellulolytic and/or hemicellulolytic enzymes by a cellulolytic microorganism, comprising using the residue from the ethanolic fermentation of enzymatic hydrolyzates of cellulosic or ligno-cellulosic materials.
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