An Evaluation of Different Bioreactor Configurations with Immobilized Yeast for Bioethanol Production

Abstract

The bioethanol industry expects a huge expansion and new technologies are being implemented with the aim of optimizing the fermentation process. The behavior of cells of Saccharomyces cerevisiae immobilized in PVA-LentiKats, during the production of bioethanol in two reactor systems, was studied. The entrapped cell in LentiKats lenses showed a different profile using stirred tank reactor (STR) and packed column reactor (PCR). Low free cells accumulation in the medium was observed for the STR after 72 h of fermentation. On the other hand, no free cells accumulation was observed, probably due to the absence of mechanical agitation in PCR configuration. Such results are probably due to the mechanical agitation of the medium provided by STR configuration, which permitted a better heat and mass transference.

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Glucose Mass Transfer in Alcoholic Fermentation Using Stirred Beds of Immobilized S. Cerevisiae Cells

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