The yield factors and productivity results of the experiments
performed in the optimization step are tabulated in Table 3. According
to this table, maximum bioethanol yield on total reducing
sugar content was obtained in the 6th experiment as 0.945 g/g
where the corresponding volumetric bioethanol productivity and
bioethanol yield on biomass were 0.121 g/L/h and 1.673 g/g,
respectively. This value was one of the highest obtained during all
the runs. The fermentation profile corresponding to this set of experiments
presented an increasing trend in bioethanol production
making a peak (8.75 g/L) at the 100 h of fermentation. Fig. 3a and b
shows the initial sugar and initial carbohydrate utilization of the