Fig. 3. Effects of dilution rate (a), temperature (b) and aeration rate (c) on ethanol yield, residual sugar and productivity during the continuous ethanol fermentation of the adjusted sweet sorghum juice. (a) 33◦C and an aeration rate of 0.025 vvm;(b) dilution and aeration rates of 0.3 h−1and 0.025 vvm, respectively; (c) 35◦C anda dilution rate of 0.3 h−1. Squares, productivity; triangles, residual sugar; and dia-monds, ethanol yield.