Abstract
The addition of α-alumina to the aqueous solution of sodium alginate for imobilization of viable cells allows the production of denser particles than the ones obtained with sodium alginate alone. This biocatalyst was used in the continuous oxidation of ethanol to acetic acid, by a strain ofAcetobacter isolated from an ethanol plant. The continuous fermentation was carried out in a circulating three-phase fluidized bed bioreactor.
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