This method was performed on 15% (g/ml) of pretreated EFB in 0.05 M buffer citrate in the erlenmeyer flask.
Both of the processes, enzymatic hydrolysis (saccharification) and fermentation, was carried out for 72 hours. Thus
the total time processes were 144 hours. Duplicate process was arranged to get the best approach. The samples,
containing pretreated EFB in the buffer citrate with pH 4.8, were closed and autoclaved at 121°C for 20 minutes.
After it was cooling down, 10, 20, 30, 40 FPU of Cellic® CTec2 per gram dry biomass and 20%Cellic® HTec2 was
added for each. All of the samples were placed in the shaking incubator. For hydrolysis process, temperature and
velocity agitation was set 50°C and 150 rpm respectively. Sampling every 24 hour was employed to monitor
producing sugar. Glucose and xylose were measured as a product in this hydrolysis.
Data of glucose form HPLC was required to get the percentage of yield (Yg). It was calculated by comparing the
weight of measured glucose (Wgm) with the theoretical weight of glucose (Wgt). The theoretical weight of glucose
is weight of glucose that should be obtained from pretreated substrate. Wgt and Yg is performed using following
equations: