Journal
ENERGIES
Volume 7, Issue 7, Pages 4054-4067Publisher
MDPI
DOI: 10.3390/en7074054
Keywords
bioethanol; NaOH pretreatment; response surface methodology; simultaneous saccharification and co-fermentation; solid state fermented sweet sorghum bagasse
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Funding
- Ministry of Science and Technology of China, International S&T Cooperation program [2013DFA60470, 2012DFG61720]
- National Key technologies RD Program [2011BAD22B03]
- 863 Project [2012AA101805]
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Ethanol production from NaOH-Pretreated solid state fermented sweet sorghum bagasse with an engineered strain of Z. mobilis TSH-ZM-01 was optimized. Results showed that: (1) residual solid removal during ethanol fermentation was unnecessary and 24 h fermentation duration was optimal for ethanol production; (2) ethanol yield of 179.20 g/kg of solid state fermented sweet sorghum bagasse achieved under the optimized process conditions of cellulase loading of 0.04 g/g-glucan, xylanase loading of 0.01 g/g-xylan, liquid to solid ratio of 9: 1 and pre-hydrolysis duration for 72 h.
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