Enhancing fermentation of starch- and sugar-based feedstocks
First Claim
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1. A method of producing one or more fermentation end-products comprising:
- (a) combining a composition comprising a biomass and a liquid, with a solution comprising a cellulosic hydrolysate comprising about 10% to about 70% w/v of C6 monosaccharides to produce a blended feedstock;
(b) contacting the blended feedstock with one or more biocatalysts; and
(c) fermenting the blended feedstock to produce one or more fermentation end-products;
wherein the biomass comprises corn, corn mash, sugar cane, sugar beets, sugar palms, sweet sorghum, nypa palm, cassava, rice, milo, sorghum, sweet potatoes, wheat, molasses, tubers, roots, stems, whole grains, barley, rye, milo, sago, cassava, tapioca, rice, peas, beans, potatoes, beets, fruits, or a combination thereof, andwherein the cellulosic hydrolysate is prepared by a method comprisingpretreating liqnocellulosic material with hot water or dilute acid to solubilize hemicellulose in the liqnocellulosic material,substantially separating the solubilized hemicellulose from remaining lignocellulosic solids, andenzymatically hydrolyzing cellulose in the remaining lignocellulosic solids to obtain the cellulosic hydrolysate,wherein less than 20% of the total saccharides in the cellulsoic hydrolysate are C5 saccharides.
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Abstract
Provided are methods, systems, and compositions for increasing the rate and/or yield of fermentation processes using blended feedstocks. Also provided are methods, systems, and compositions for decreasing the yield of one or more undesirable products during fermentation.
128 Citations
25 Claims
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1. A method of producing one or more fermentation end-products comprising:
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(a) combining a composition comprising a biomass and a liquid, with a solution comprising a cellulosic hydrolysate comprising about 10% to about 70% w/v of C6 monosaccharides to produce a blended feedstock; (b) contacting the blended feedstock with one or more biocatalysts; and (c) fermenting the blended feedstock to produce one or more fermentation end-products; wherein the biomass comprises corn, corn mash, sugar cane, sugar beets, sugar palms, sweet sorghum, nypa palm, cassava, rice, milo, sorghum, sweet potatoes, wheat, molasses, tubers, roots, stems, whole grains, barley, rye, milo, sago, cassava, tapioca, rice, peas, beans, potatoes, beets, fruits, or a combination thereof, and wherein the cellulosic hydrolysate is prepared by a method comprising pretreating liqnocellulosic material with hot water or dilute acid to solubilize hemicellulose in the liqnocellulosic material, substantially separating the solubilized hemicellulose from remaining lignocellulosic solids, and enzymatically hydrolyzing cellulose in the remaining lignocellulosic solids to obtain the cellulosic hydrolysate, wherein less than 20% of the total saccharides in the cellulsoic hydrolysate are C5 saccharides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification