Fig. 3. Comparison of prehydrolysis and simultaneous saccharification and fermentation
(SSF) process depends on the type of impeller used. d Standard impeller
– glucose, s standard impeller – ethanol, N angled-type impeller I – glucose, 4
angled-type impeller I – ethanol, j angled-type impeller II – glucose, h angled-type
impeller II – ethanol, angled-type impeller III – glucose, and } angled-type
impeller III – ethanol.