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Agar immobilized yeast cells in tubular reactor for ethanol production.
Indian J Exp Biol ; 1998 Aug; 36(8): 816-9
Artículo en Inglés | IMSEAR | ID: sea-58956
ABSTRACT
Saccharomyces cerevisiae cells were immobilized in agar gel and used in a tubular reactor for conversion of cane molasses to ethanol at 30 degrees C, pH 4.5. Reactor was used in a continuous operation to test the operational stability and ethanol productivity. After 100 days of continuous fermentation at a dilution rate of 0.67 hr-1, some deactivation of cells was observed, but ethanol productivity was recovered by reactivating the cells by sparging air intermittently. It was found that intermittent reactivation during continuous operation was very important for satisfactory performance of the reactor. During operation, gel beads maintained their rigidity. Maximum ethanol concentration (94.9 g/L) was obtained with a feed containing 255 g/L reducing sugar, at a dilution rate of 0.2 hr-1. Maximum volumetric productivity (79.5 g ethanol /L/hr), specific ethanol productivity (0.58 g ethanol/g cells/hr), specific sugar uptake rate (1.12 g sugar/g cells/hr) and ethanol yield coefficient (0.43 g ethanol/g sugar) were obtained with a feed containing 195 g/L reducing sugar at a dilution rate of 1.33 hr-1.
Asunto(s)
Texto completo: Disponible Índice: IMSEAR (Asia Sudoriental) Asunto principal: Saccharomyces cerevisiae / Melaza / Reactores Biológicos / Agar / Etanol / Fermentación Idioma: Inglés Revista: Indian J Exp Biol Año: 1998 Tipo del documento: Artículo

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Texto completo: Disponible Índice: IMSEAR (Asia Sudoriental) Asunto principal: Saccharomyces cerevisiae / Melaza / Reactores Biológicos / Agar / Etanol / Fermentación Idioma: Inglés Revista: Indian J Exp Biol Año: 1998 Tipo del documento: Artículo