Pre-treatment of bales of feedstock
First Claim
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1. A method for conversion of a lignocellulosic feedstock to glucose comprising the steps of:
- a. conveying one or more than one bale of the lignocellulosic feedstock into a pre-treatment reactor;
b. adding steam and acid to the bale, the steam and acid maintained at a temperature, acid concentration, and for a time sufficient to hydrolyze hemicellulose to xylose and increase susceptibility of cellulose to digestion by cellulase enzymes, to produce a pre-treated feedstock;
c. depressurizing the pre-treatment reactor;
d. removing the pre-treated feedstock from the pre-treatment reactor; and
e. hydrolysing the pre-treated feedstock using cellulase enzymes to produce glucose.
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Abstract
The present invention is directed to a method of pre-treating a lignocellulosic feedstock. The lignocellulosic feedstock comprises cereal straw, stover, or grass. One or more than one bale of lignocellulosic feedstock is conveyed into a pre-treatment reactor. Steam and acid are added to the bales and are maintained at a temperature, acid concentration, and for a time sufficient to hydrolyze hemicellulose to xylose and increase susceptibility of cellulose to digestion by cellulase enzymes, thus producing a pre-treated feedstock. The pre-treated feedstock is then removed from the pre-treatment reactor.
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Citations
18 Claims
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1. A method for conversion of a lignocellulosic feedstock to glucose comprising the steps of:
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a. conveying one or more than one bale of the lignocellulosic feedstock into a pre-treatment reactor; b. adding steam and acid to the bale, the steam and acid maintained at a temperature, acid concentration, and for a time sufficient to hydrolyze hemicellulose to xylose and increase susceptibility of cellulose to digestion by cellulase enzymes, to produce a pre-treated feedstock; c. depressurizing the pre-treatment reactor; d. removing the pre-treated feedstock from the pre-treatment reactor; and e. hydrolysing the pre-treated feedstock using cellulase enzymes to produce glucose. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for pre-treating a lignocellulosic feedstock comprising the steps of:
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a. conveying one or more than one bale of lignocellulosic feedstock into a pre-treatment reactor, the lignocellulosic feedstock comprising cereal straw, stover, or grass; b. adding steam and acid to the bale, the steam and acid maintained at a temperature, acid concentration, and for a time sufficient to hydrolyze hemicellulose to xylose and increase susceptibility of cellulose to digestion by cellulase enzymes, to produce a pre-treated feedstock; c. depressurizing the pre-treatment reactor; and d. removing the pre-treated feedstock from the pre-treatment reactor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification