rateFig. 2. Changes in the number of yeast, viability and pH during the continuous ethanol fermentation of the adjusted sweet sorghum juice at different dilution rates (a),temperatures (b) and aeration rates (c). (a) 33◦C and an aeration rate of 0.025 vvm; (b) dilution and aeration rates of 0.3 h−1 and 0.025 vvm, respectively; (c) 35◦C and adilution rate of 0.3 h−1. Squares, number of yeast; circles, viability; and diamonds, pH.