Lactic acid fermentation was carried out at pH 4.75, 5.00, 5.25,5.50 and 5.75, using ACU-ammonia as neutralizing agent. Tables 2 and 3 show the results of lactic acid fermentation by cultures of
R. oryzae BCRC 33071 and ATCC 9363 at different pH values and maximum lactic acid produced from two strains were 102.4 1.6 g/l and 92.2 2.7 g/l, respectively.