Fig. 3. Effects of dilution rate (a), temperature (b) and aeration rate (c) on ethanolyield, 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.