Fig. 2 shows the stirring speed profile for all the experiments
and indicated the bacterial behaviour and oxygen demands at
increased NaCl concentrations. DO was controlled at 40% throughout
each experiment by maintaining the stirring speed to avoid any
oxygen limitation for bacterial growth. Fig. 2 shows the stirring
speed in the fermenter and it was observed that at the beginning
of the control fermentation, the stirring speed was 200 rpm as
compared to 300 rpm for all other fermentations and 600 rpm for
the 15 g/l NaCl fermentation