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Modelling a solid-state fluidized bed fermenter for ethanol production with S. cerevisiae

Modellierung eines Gas/Feststoff/Wirbelschichtfermenters für die Produktion von Ethanol mit Saccharomyces cerevisiae
: Schößler, M.; Bauer, W.; Röttenbacher, L.

BioProcess engineering 2 (1987), Nr.1, S.25-31
ISSN: 0883-0878
Fraunhofer ILV ( IVV) ()
ethanol; Feststoff; gas; Produktion; saccharomyces cerevisiae; Wirbelschichtfermenter

A model is proposed to describe the performance of a new type of fermenter for ethanol production, the fluidized bed gas-solid fermenter, with respect to scaling-up effects. Based on the fact that in the fluid bed the substrate is not supplied continuously to each particle, two scale-up parameters are derived, circulation time tau and specific substrate suplly Delta m sub G,P, which are shown to influence reactor efficiency significantly. The validity of the model is checked by comparing the calculated yield coefficients for ethanol, cell mass and carbon dioxide to the results of fermentation experiments performed under aerobic conditions in a laboratory-scale reactor and a semi-technical fermenter.