Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 8, Issue 4, 2006; Page No.(745-749)

COMPARATIVE STUDY OF ETHANOL PRODUCTION BY BATCH FERMENTATION USING FREE CELLS OF SACCHAROMYCES CEREVISI 4E AND ZYMOMONAS MOBILIS

E. RANI, M. SUN ITHA AND K. DEVAKI

Abstract

The saccharine material cane sugar (5%) was utilized for ethanol production through batch fermentation by the free cells of yeast strain Saccharomyces cerevisiae and bacterial strain Zymomonas mobilis. During fermentation samples were taken at various time intervals like 12,24,36,48,60,72,84and 96 hours and they were analyzed for biomass. pH,residual sugar and alcohol percentage. After fermentation the samples were analysed and yield of ethanol was calculated. The total volatile acid was also estimated. After distillation the effluent was assayed for color, odor, pH, Total suspended solids(TSS)and Total dissolved solids(TDS).The ethanol yield by canesugar (5%) through fermentation was found to be 44.78% and 46.76% by Saccharomyces cerevisiae and Zymomonas mobilis respectively.

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