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- W2047079105 abstract "Abstract Using immobilized whole yeast cells, important fermentation variables involved in ethanol fermentation have been studied and the performance of an immobilized cell reactor system evaluated . Saccharomyces cerevisiae cells were immobilized in calcium alginate gel. The performance of a packed column reactor in terms of ethanol productivity was considerably better than that of a stirred tank reactor. This difference was due partly to attrition of active yeast cells and distintegration of gel particles in the stirred tank reactor. A packed column reactor was used in a continuous operation to test the operational stability and ethanol productivity. After 20 days of continuous fermentation, some deactivation of cells was observed, but ethanol productivity was recovered by reactivating the cells with nutrients. It was found that the initial activation of immobilized cells as well as intermittent reactivations during operation were very important to the satisfactory performance of the reactor system over a prolonged period. The maximum ethanol concentration observed in the effluent was 98 gl −1 at a mean residence time of 3.8h. Under stable continuous operating conditions, ethanol productivity was 38 gl −1 h −1 . At a high substrate concentration, both product inhibition by ethanol and substrate inhibition by d -glucose were observed. The severity of the substrate inhibition effect was found to be dependent upon the flow rate or mean residence time ." @default.
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- W2047079105 date "1983-01-01" @default.
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- W2047079105 title "Performance of an immobilized yeast reactor system for ethanol production" @default.
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- W2047079105 doi "https://doi.org/10.1016/0141-0229(83)90063-7" @default.
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