High glucose concentration 150 g/l was used in continuous
fermentation using immobilized S. cerevisiae;
and the obtained data sugar consumption and ethanol
production with respect to retention time are shown in
Fig. 11. As the retention time was gradually increased
the glucose concentration dropped, while the ethanol
concentration profile yielded an increasing trend. The
maximum ethanol concentration of 47 g/l was obtained
with retention time of 7 h. The yield of ethanol production
was approximately 38% compared with batch
data where only 8% improvement was achieved