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Thermochemical Treatment of Lignocellulosics for the Production of Ethanol
Thermochemical Treatment of Lignocellulosics for the Production of Ethanol
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机译:木质纤维素的热化学处理,用于生产乙醇
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摘要
A method to process lignocellulosic biomass into ethanol under conditions of high biomass loading is disclosed. Pretreatment of biomass was conducted at a high concentration of solids but with a relatively low concentration of ammonia relative to the dry weight of biomass. The pretreated biomass was washed to remove inhibitors and to minimize the carry-over of the inhibitors to the subsequent steps of saccharification and fermentation. The pretreated-washed biomass is ground at some point prior to saccharification. Enzymes are added to allow saccharification and biomass liquification. More solids are added in a fed-batch manner as saccharification proceeds to ultimately obtain fermentation of a high-biomass concentration and get a higher ethanol titer. The amount of solids added in the fed-batch is such that the process achieves optimum hydrolysis to sugars by the saccharification enzymes.
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