Ethanol production by a flocculant yeast strain in a CSTR type fermentor with cell recycling |
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Authors: | Ossamu Hojo Carlos Osamu Hokka Ana Maria Souto Maior |
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Institution: | 1. DEQ/UFSCar, Rua Francisco Degni, s/n, Caixa Postal 335 CEP, 14800-900, S?o Carlos, SP, Brazil
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Abstract: | Tests were performed in a continuous stirred tank reactor (CSTR), with and without cell recycling, to produce ethanol. The
reactor without cell recycling produced the kinetic model of ethanol production, whereas the reactor with cell recycling allowed
for a study of process stability.
The Levenspiel kinetic model was adopted; however, in the case of fermentation with cell recycling, the coefficient of cell
death was added. It was observed that cellular viability varied greatly throughout the fermenting process and that microaeration
is of fundamental importance in maintaining the stability of the process. |
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Keywords: | Ethanol flocculant yeast |
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