Process for the production of an enzymatic cocktail using liquid residues from a process for the biochemical conversion of lignocellulosic materials
First Claim
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1. A process for the production of an enzymatic cocktail with a cellulolytic microorganism, comprising:
- pre-treating lignocellulosic materials without sterilization or modification of the pH of a liquid residue obtained therefrom,growing a microorganism in a closed reactor in the presence of a carbonaceous growth solution comprising a carbonaceous growth substrate;
producing an enzymatic cocktail comprising a supply of carbonaceous production solution including a concentration of a carbonaceous substrate in the range 150 to 400 g/L, wherein the carbonaceous production solution comprises a carbonaceous inducer substrate, wherein the carbonaceous inducer substrate is the obtained liquid residue and comprises C5 sugar oligomers,wherein the C5 sugar oligomers are at least 1% by weight of the total sugars present in said liquid residue, and are 0.3% to 20% by weight of the total sugars present in said carbonaceous production solution wherein the C5 sugar oligomers in the carbonaceous inducer substrate induce the production of enzymes.
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Abstract
A process for the production of an enzymatic cocktail with a cellulolytic microorganism comprises two phases:
- a phase a) for growth of said microorganism in a closed reactor in the presence of a carbonaceous growth solution;
- a phase b) for the production of said enzymatic cocktail carried out with a supply of carbonaceous production solution the concentration of carbonaceous substrate of which is in the range 150 to 400 g/L, said carbonaceous production solution comprising a carbonaceous inducer substrate;
characterized in that said carbonaceous inducer substrate is a liquid residue obtained from a step for pre-treatment of lignocellulosic materials, the C5 sugar oligomers of which represent at least 1% by weight of the total sugars present in said liquid residue, and at least 0.3% by weight of the total sugars present in said carbonaceous production solution.
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11 Claims
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1. A process for the production of an enzymatic cocktail with a cellulolytic microorganism, comprising:
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pre-treating lignocellulosic materials without sterilization or modification of the pH of a liquid residue obtained therefrom, growing a microorganism in a closed reactor in the presence of a carbonaceous growth solution comprising a carbonaceous growth substrate; producing an enzymatic cocktail comprising a supply of carbonaceous production solution including a concentration of a carbonaceous substrate in the range 150 to 400 g/L, wherein the carbonaceous production solution comprises a carbonaceous inducer substrate, wherein the carbonaceous inducer substrate is the obtained liquid residue and comprises C5 sugar oligomers, wherein the C5 sugar oligomers are at least 1% by weight of the total sugars present in said liquid residue, and are 0.3% to 20% by weight of the total sugars present in said carbonaceous production solution wherein the C5 sugar oligomers in the carbonaceous inducer substrate induce the production of enzymes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification