期刊
BIORESOURCE TECHNOLOGY
卷 270, 期 -, 页码 742-745出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.120
关键词
Corn fiber; Cellulosic ethanol; Dry grind; Cellulase; Phenolic compounds
资金
- DOE Center for Advanced Bioenergy and Bioproducts Innovation (U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research) [DE-SC0018420]
Conversion of corn fiber to ethanol in the dry grind process could increase ethanol yields, reduce downstream processing costs and improve overall process profitability. This work investigates the in-situ conversion of corn fiber into ethanol (cellulase addition during simultaneous saccharification and fermentation) during dry grind process. Addition of 30 FPU/g fiber cellulase resulted in 4.6% increase in ethanol yield compared to the conventional process. Use of excess cellulase (120 FPU/g fiber) resulted in incomplete fermentation and lower ethanol yield compared to the conventional process. Multiple factors including high concentrations of ethanol and phenolic compounds were responsible for yeast stress and incomplete fermentation in excess cellulase experiments.
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