US Patent 7354744 Process for producing L-glutamic acid

L-glutamic acid is produced by culturing in a liquid medium containing L-glutamic acid at a saturation concentration and the carbon source a microorganism that can metabolize a carbon source at a specific pH, and wherein said microorganism has an ability to accumulate L-glutamic acid in said medium in an amount which exceeds the the saturation concentration of L-glutamic acid, wherein the pH of said medium is controlled so that L-glutamic acid precipitates.