Production of Riboflavin and Vitamin B₁₂ by Bacillus megaterium ATCC 13639 and Enterobacter aerogenes in Corn Meal

The % RNV values and available lysine of corn meal were decreased (P 0.05) among the yields of riboflavin by B. megaterium in fermented corn meal at different pH and temperatures. Vitamin B12 and riboflavin increased most rapidly during the first day of fermentation and continued to increase until the 5th day.