Method for Improving Yield of Cellulose Conversion Processes
First Claim
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1. A method for converting a cellulosic material to glucose comprising the steps of:
- combining a cellulosic material with a cellulase such that the resulting combination of cellulosic material and cellulase has 1% to about 30% cellulose by weight; and
incubating said cellulosic material and cellulase combination at a temperature greater than about 38°
C. to about 100°
C. for about 0.1 hours to about 96 hours at a pH of from about 4 to about 9 to cause a hydrolysis reaction to convert at least 20% of said cellulosic material to soluble sugars,wherein said soluble sugars comprises glucose and cellobiose, and the fraction of glucose is at least 0.75 relative to said soluble sugars.
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Abstract
The present teachings provide methods of converting cellulosic materials to soluble sugars. Methods for increasing the yield of glucose from the enzymatic saccharification of cellulosic materials is also provided. The present teachings further provide methods of increasing the yield of cellobiose from the enzymatic saccharification of cellulosic materials.
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Citations
21 Claims
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1. A method for converting a cellulosic material to glucose comprising the steps of:
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combining a cellulosic material with a cellulase such that the resulting combination of cellulosic material and cellulase has 1% to about 30% cellulose by weight; and incubating said cellulosic material and cellulase combination at a temperature greater than about 38°
C. to about 100°
C. for about 0.1 hours to about 96 hours at a pH of from about 4 to about 9 to cause a hydrolysis reaction to convert at least 20% of said cellulosic material to soluble sugars,wherein said soluble sugars comprises glucose and cellobiose, and the fraction of glucose is at least 0.75 relative to said soluble sugars. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for converting a cellulosic material to cellobiose comprising the steps of:
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combining a cellulosic material with a cellulase mixture comprising an endoglucanase 1 such that the resulting combination of cellulosic material and cellulase mixture has 1% to about 30% cellulose by weight; and incubating said cellulosic material and cellulase combination at a temperature less than about 100°
C. to about 25°
C. for about 0.1 hours to about 96 hours at a pH of from about 4 to about 9 to cause a hydrolysis reaction to convert up to 50% of said cellulosic material to soluble sugars, wherein said soluble sugars comprises glucose and cellobiose and the fraction of glucose is less than about 0.5 relative to said soluble sugars. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification