3.5. Submerged fermentation (small scale)
The fermentation rate of SSII2 (B. subtilis) strain for the alpha
amylase production was investigated in 5 L submerge
fermentor. The culture aliquots were withdrawn every 6 h,
starting from 12 h aseptically and subjected to enzyme estimation
up to 40 h of fermentation period. After submerged
fermentation, the maximum activity of amylase was obtained
in the enzyme extract harvested after 12 h at pH 7 and 32 C
temperature. During submerged fermentation process the
production of amylase reached maximum of 4 U/ml at 10 h of
incubation period. The enzyme production reached its
maximum enzyme production 2.72 g/L at 12 h.20 Partial purification
of amylase enzyme by ammonium sulfate precipitation
showed maximum protein content of 54.54, which is mg/
L up to 80% purification fold.