TY - JOUR T1 - Agar immobilized yeast cells in tubular reactor for ethanol production. AU - Nigam,J N, AU - Gogoi,B K, AU - Bezbaruah,R L, PY - 1998/12/5/pubmed PY - 1998/12/5/medline PY - 1998/12/5/entrez SP - 816 EP - 9 JF - Indian journal of experimental biology JO - Indian J Exp Biol VL - 36 IS - 8 N2 - 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. SN - 0019-5189 UR - https://www.unboundmedicine.com/medline/citation/9838885/Agar_immobilized_yeast_cells_in_tubular_reactor_for_ethanol_production_ DB - PRIME DP - Unbound Medicine ER -