Effect of aeration and dilution on continuous bio ethanol production in a packed-bed bioreactor by Saccharomyces cerevisiae

Stability of cell growth was achieved continuously at a steady state in a packed-bed bioreactor. The highest productivity of ethanol was achieved (0.02 g/ L/ h) when 0.003 vvm was employed. The productivity of bio ethanol increases when dilution rate increases. The highest production of 0.037 g/ L/ h was recorded when the dilution rate (D) was at 0.05 per hour. The production of bio ethanol was successfully maintained in a non 100 b % anaerobic condition. The best aeration for the continuous production of bio ethanol in a condition of steady state growth was at an aeration rate of 0.003 vvm. (author)