Optimization of bioethanol production from apple pomace was
performed according to the face centered central composite
experimental design. According to the screening results, levels of
the factors chosen for the optimization process were redefined.
Inoculation rate of A.sojae and T.harzianum and agitation speed were broadened in the range of 0e6 % (w/v), 100e300 rpm,
respectively. The actual levels of these variables and the responses
are tabulated in Table 2. The p-value of the model, according to
ANOVA, was 0.0063 which indicated that the constructed model
was significant (p < 0.01) and that the terms included in this model
had an important effect on bioethanol production. This p-value also
showed that although the results seemed close to each other they
were different and statistically significant. The model equation that
expressed bioethanol production in terms of coded factors was as
followings: