An effective approach to improve ethanol productivity by simultaneous saccharification and fermentation of rice straw |
| |
| Authors: | Taiping Xie Longjun Xu Chenglun Liu Zhiming Bi |
| |
| Institution: | 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China;2. Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM), Yangtze Normal University, Chongqing, China;3. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China |
| |
| Abstract: | Fuel ethanol was produced using rice straw with the simultaneous saccharification and fermentation (SSF) method. The influence of cellulose liquefaction pretreatment and Fe2+ quantity on ethanol productivity was investigated in detail. At the same time, the optimized conditions including fermentation temperature, Fe2+ amount, yeast inoculation quantity, and the inoculated cellulose enzyme dosage in the SSF process were systematically investigated by analyzing fuel ethanol yield. The result indicated that fuel ethanol yield was 0.319 g per gram rice straw by SSF approach when appropriate amount of Fe2+ was added into the reaction system. The optimal technology parameters were: fermenting temperature of 36°C, Fe2+ amount of 4 mg · g?1, inoculating proportion of 20%, cellulose enzyme of 20 IU · g?1, and Pachysolen tannophilu/saecharomyces cerevisiae of 1:2 ratio. The ethanol yield under the best conditions was larger than that of the control group. We hope that this research can facilitate to achieve large-scale comprehensive utilization for rice straw. |
| |
| Keywords: | Cellulose liquefaction Fe2+ fuel ethanol productivity rice straw SSF (simultaneous saccharification and fermentation) |
|
|
