Ethanol production from native cassava starch by a mixed culture of Endomycopsis fibuligera and Zymomonas mobilis |
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Authors: | C. Gonz lez,O. Delgado,M. Baigorí ,C. Abate,D. A. Callieri,L. I. C. De Figueroa |
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Affiliation: | C. González,O. Delgado,M. Baigorí,C. Abate,D. A. Callieri,L. I. C. De Figueroa |
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Abstract: | The conversion of starch from unhydrolyzed cassava flour to ethanol by a pure culture of Endomycopsis fibuligera and by a co-culture of this amylolytic yeast and the bacterium Zymomonas mobilis was studied. The best overall results were obtained using the mixed culture. After 96 h of fermentation of a medium containing 150 g/l initial cassava starch, an ethanol concentration of 31.4 g/l, a productivity of 0.33 g ethanol/l × h and a yield of 0.21 g ethanol/g initial starch were reached. The highest yield (0.37 g/g) was obtained after 48 h when using a medium containing 50 g/l initial starch. |
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