International Scholarly Research Notices / 2013 / Article / Tab 5

Research Article

Enhanced Cellulase Production from Bacillus subtilis by Optimizing Physical Parameters for Bioethanol Production

Table 5

Bioethanol production by SSF from wild grass employing B. subtilis cellulase and Z. mobilis.

PretreatmentSubstrate concentration (%, w/v)Mode of SSFSSF process parameters
Reducing sugar* (g/L)Ethanol yield (g/g)Ethanol titre* (g/L)

Acid acetone1%Shake flask1.10 ± 0.070.0930.93 ± 0.07
Alkali1%Shake flask1.25 ± 0.040.0980.98 ± 0.06
Alkali1%Bioreactor2.51 ± 0.030.222.23 ± 0.08
Alkali5%Shake flask9.08 ± 0.060.157.56 ± 0.05
Alkali5%Bioreactor13.22 ± 0.040.2311.65 ± 0.04

values correspond to the maximum reducing sugar and maximum ethanol titre at a particular time.
Values are mean ± SE ( ).