Process for hydrolysis of wet fiber and method for producing fermentation products from wet fiber
First Claim
1. A method comprising:
- providing a wet fiber material having a water content of about 20 to about 70 percent;
macerating the wet fiber material under acidic conditions in a first processing unit to provide a slurry having a solids content of at least about 10 percent after maceration and a viscosity suitable for pumping, the solids content being greater than preparing the wet fiber under acidic conditions without macerating;
pumping the slurry to a second processing unit; and
shearing the slurry in the presence of steam in the second processing unit.
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Accused Products
Abstract
Disclosed are a method of hydrolysis of wet fiber and a method for preparing ethanol. Generally, an agricultural plant material, such as corn hulls, distiller'"'"'s dried grains, or spent germ, is treated to at least partially hydrolyze the fiber. The process may include a maceration step followed by a shearing operation in the presence of steam to yield a treated product, in which, in many embodiments, saccharides will be released and unbound from fibrous portions of the agricultural product. In some embodiments, the process includes macerating the material to provide a slurry having a solids content of at least 10 percent and jet cooking the slurry. A mixture of saccharides prepared in this fashion may be fermented to yield ethanol and/or biochemicals.
21 Citations
22 Claims
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1. A method comprising:
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providing a wet fiber material having a water content of about 20 to about 70 percent; macerating the wet fiber material under acidic conditions in a first processing unit to provide a slurry having a solids content of at least about 10 percent after maceration and a viscosity suitable for pumping, the solids content being greater than preparing the wet fiber under acidic conditions without macerating; pumping the slurry to a second processing unit; and shearing the slurry in the presence of steam in the second processing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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providing a wet fiber material having a water content of about 20 to about 70 percent; macerating the wet fiber material under acidic conditions and under grinding, shredding and/or shearing in a first processing unit to provide a slurry having a solids content of at least about 10 percent after maceration and a viscosity suitable for pumping; pumping the slurry to a second processing unit; and shearing the slurry in the presence of steam in the second processing unit. - View Dependent Claims (17, 18)
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19. A method comprising:
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providing a wet fiber material having a moisture content of at least about 20 wt %; decreasing the average particle size of the wet fiber material to 100 to about 1000 microns; macerating the wet fiber material under acidic conditions and under grinding, shredding and/or shearing in a first processing unit to provide a slurry, the slurry having a solids content of at least about 10% and a viscosity suitable for pumping; and pumping the slurry to a second processing unit; and shearing the slurry in the presence of steam in the second processing unit. - View Dependent Claims (20, 21, 22)
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Specification