3.2 Ethanol and hydrogen production by separate hydrolysis and fermentation (SHF)
20g/L of pretreated peel with the addition of the enzyme solution (Cellulase, 100 FPU/mL) was
utilized as substrate for ethanol and hydrogen production by SHF. The maximum sugar production
(36.25±2.87 g/L) was obtained after 24 h of incubation time. The production of sugar during fermentation
was presented in Table 3.