Abstract
Heterogeneous compartmental model is used to optimize the performance of a packed bed fer-mentor with immobilized zymomonas mobilis for the production of fuel alcohol. The results indicate that the outlet ethanol concentrations have maximum values that decreased with increasing feed sugar concentration at single bead diameter. The outlet ethanol concentrations have maximum values that increased with decreasing the dilution rate. As the dilution rate increased the ethanol production increased. As the substrate inhibition constant (K1) increased both the maximum outlet ethanol concentration and the optimum feed sugar concentration increased up to K1 value of 500 g/L above that each have constant value.
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