3.3. Hydrolysis of corncob residue by cellulase
The enzyme koji produced by Trichoderma reesei in solid state fermentation was used directly to hydrolyze corncob residue. The results of enzymic hydrolysis are
shown in Fig. 4.
When the enzyme dosage was changed from 10 IFPU:g substrate to 15 IFPU:g substrate, the yield of enzymic hydrolysis was raised sharply from 52.4 to
74.5%. Further increase in the cellulase dosage did not produce a corresponding increase in the hydrolysis yield. According to these results, 1 kg of cellulase koji
produced in the present process can hydrolyze more than 4 kg of corncob residue with a saccharification yield of 90%. This process therefore has a high potential for comprehensive utilization of renewable
lignocellulosic resources.