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| Study of Ethanol Fermentation by Immobilized Saccharomyces cerevisiae and Immobilized Microecology |
| WU Xiao-dan1, XU Er-ni1, XU Ying-xuan2, LUO Yu-fen1, LIU Yu-huan1,3 |
1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China;
2. Institute for Advanced Study, Nanchang University, Nanchang 330031, China;
3. The Engineering Research Center for Biomass Conversion, Nanchang University, Nanchang 330047, China |
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Abstract The ethanol fermentation ability of SA-PVA-SiO2 immobilized Saccharomyces cerevisiae and free S. cerevisiae was compared. In addition, batch fermentation was used to test the stability of ethanol fermentation of immobilized S. cerevisiae. The results showed that, the fermentation speed of SA-PVA-SiO2 immobilized S. cerevisiae was faster than free S. cerevisiae; the fermentation stability of the immobilized S. cerevisiae was good, the volume fraction of ethanol remained 3%~3.5 ％ when cultured at 30 ℃ for 24 hours using rubber plug and the shape of balls were still intact, not sticky afte 14 batches continuous fermentation; The internal immobilized environment was very conducive to the anaerobic fermentation to produce ethanol by SA-PVA-SiO2 immobilized S. cerevisiae.
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Received: 21 September 2010
Published: 01 April 2011
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