3.3. Bioethanol
Production and accumulation of VFA and ethanol as secondary
metabolites takes place due to anaerobic SSF in bacteria and yeast
(Raghavarao et al., 2003). During SBES operation, biocatalyst mediated
catalytic functions lead to biotransformation of VFA into
acetaldehyde and CO2. Acetaldehyde is further transformed to
ethanol as end product in the presence of biocatalyst. Samples
were collected at frequent intervals viz., 10th, 20th and 30th days
of SBES operation to evaluate ethanol production efficiency. SBES