Discussion
What provision a typical bioreactor possess to overcome the vortex formation during fermentation ?
Answer: D
Vortex formation is prevented by baffles on the side walls of the fermentor.
Baffles are vertical metal strips fixed to the vessel wall. They break the circular flow set up by the impeller, converting swirling into turbulent mixing, which stops a vortex forming and improves aeration and mixing.
The agitator is what sets the liquid rotating in the first place, so it causes the vortex rather than preventing it. The sparger introduces air at the bottom of the vessel, and stuffing boxes seal the agitator shaft where it passes through the vessel. Neither controls vortexing.
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