Fig. 4
Effect of the fermentation period on the level of ethanol production from a the starch hydrolysate, and b the H2SO4 / cellulase treated lignocellulosic fiber [6% (w/v) loaded] hydrolysate, as substrates. Hydrolysates were fermented without (NH4)2SO4 supplementation to ethanol by S. cerevisiae at 30°C, pH 4.5 without shaking. The data are displayed as the mean ± 1 SD, and are derived from triplicate experiments