Question

4. Acetobacter aceti bacteria convert ethanol to acetic acid under aerobic conditions. A continuous fermentation process for vinegar production using A. aceti cells immobilised on the surface of gelatine beads is used. An aqueous solution of ethanol is the reactant. The production target is 7 kg/h acetic acid in aqueous solution. However the maximum acetic acid concentration tolerated by the cells is 12 %. Air is pumped into the fermenter so that 4.5 kg/h of oxygen are delivered. Using mass balance, determine how much water is needed in the feed to avoid acetic acid inhibition?

Answer 1

the acetobacter anti bacteria convert ethanol to acetic acid under aerobic conditions. a continuous fermentation process for vinegar production is proposed using no growing a acetic cells ammoniated on the surface of gelatine beads . air is pumped into the fermented at a rest of 200 molar the production target target is 2kgh acetic acid and the maximum acetic acid concentration tolerated by the cells is 12 wt % to meet the production target 1.5 kg h^-1 ethanol is required. water must be used to 14.1 kg h^-1 dilute the ethanol. the fermented off gas is 52 % o_2