Overall, as it can be seen from Fig.1e, low levels of inoculation
rates of A.sojae, T.harzianum and S.cerevisiae, high agitation speed
and the use of vented fermentation flasks led to high bioethanol
production. Therefore, the inoculation rate of S.cerevisiae was kept
at its low level (4%) by taking into account the model graphs shown
in the foregoing figures. Although aeration was a nonsignificant
model factor, with the use of vented flasks bioethanol production
increased. Based on these, inoculation rate of S.cerevisiae was fixed
at 4% (v/v) and vented aeration method was chosen for the further
optimization study.
Overall, as it can be seen from Fig.1e, low levels of inoculationrates of A.sojae, T.harzianum and S.cerevisiae, high agitation speedand the use of vented fermentation flasks led to high bioethanolproduction. Therefore, the inoculation rate of S.cerevisiae was keptat its low level (4%) by taking into account the model graphs shownin the foregoing figures. Although aeration was a nonsignificantmodel factor, with the use of vented flasks bioethanol productionincreased. Based on these, inoculation rate of S.cerevisiae was fixedat 4% (v/v) and vented aeration method was chosen for the furtheroptimization study.
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