Optimization of the Cultivable Conditions of Yeast YG28 in Monosodium Glutamate Waste Water

In order to obtain cell protein from the monosodium glutamate (MSG) waste water, the culture conditions for yeast were studied in this paper. The optimum condition was that: the liquid capacity was 60 mL/250mL flask, liquor dilution ratio of MSG waste water was 1:1, the culture time for liquid seed was 16 hours, inoculation rate was 8%, speed was 180 rpm, Temperature was 28°C. Cultured at the optimum conditions for 36h, 28.28g/L cell protein was obtained, 92.2% utilization of reducing sugar was reached, 71.1% removal rate of chemical oxygen demand was realized and 64.7 % removal rate of Kjeldahl nitrogen was achieved. The cell protein could be recovered, the results do spade work for after-treatment. Certain economic and environmental benefits could be obtained.