Many chemical and biological processes are being
explored to derive economic and environmental benefits
from crude glycerol (Nicol et al. 2012), but biological
means is safer, cheaper and more environment friendly.
Thus, Choi et al. (2011) defined glycerol-based refinaries
as the microbial fermentation processes that use surplus,
inexpensive crude glycerol as feedstock to produce fuels
and chemicals. The biological agent may be algae, fungi,
or bacteria. Enterobacter aerogenes, a member of Enterobacteriaceae,
has been shown to produce predominantly
ethanol and hydrogen from glycerol (Ito et al. 2005).
Nwachukwu et al. (2012) reported that E. aerogenes