The production of acetate from the fermentation of lactate by Gluconob
acter oxydans was studied. Batch experiments showed that glucose was t
he preferred substrate compared to lactate. A fed-batch culture was fe
d with a mixture of glucose and lactate followed by periodic addition
of lactate. The maximum productivity of acetate was 0.16 g/l h but thi
s value decreased during the fed-batch culture due to growth inhibitio
n by acetate.