The prodn. of acetate from the fermn. of lactate by Gluconobacter oxydans was studied. Batch expts. showed that glucose was the preferred substrate compared to lactate. A fed-batch culture was fed with a mixt. of glucose and lactate followed by periodic addn. of lactate. The max. productivity of acetate was 0.16 g/L-h, but this value decreased during fed-batch culture due to growth inhibition by acetate. [on SciFinder (R)]