期刊
ENERGY & FUELS
卷 29, 期 1, 页码 185-190出版社
AMER CHEMICAL SOC
DOI: 10.1021/ef5018576
关键词
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资金
- National Outstanding Youth Foundation of China [21025625]
- National High-Tech Research and Development Program of China (863) [2012AA021203]
- National Basic Research Program of China (973) [2013CB733602]
- Major Research Plan of the National Natural Science Foundation of China [21390204]
- National Technology Support Program [2012BAI44G01]
- National Natural Science Foundation of China, General Program [21376118]
- National Natural Science Foundation of China, Youth Program [21106070]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1066]
- Jiangsu Provincial Natural Science Foundation of China [SBK 201150207, BK2011031]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- State Key Laboratory of Motor Vehicle Biofuel Technology [2013003]
In this study, a fibrous matrix with chemical modification was used as a support material for the immobilization of Saccharomyces cerevisiae 1308. Cassava hydrolysate without filteration was used for ethanol fermentation. An average utilization rate of starch of 83.5% was obtained by the immobilized cells during the first seven repeated simultaneous saccharification and fermentation. The utilization rate of starch of the immobilized cells was 2.1% higher than that of free cells with an inoculation quantity of 15% (v/v) under the same fermentation conditions. In addition, the effects of enzyme feeding strategies on immobilized yeast fermentation were investigated. The highest utilization rate of starch of 85.9% was obtained at 35 degrees C with the optimal enzyme feeding strategy. Fermentation performed successfully for about 6 months with 87 batches suggests that ethanol production from cassava using immobilized yeast in a fibrous-bed bioreactor is feasible and may meet the demands of industrial production.
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