Hi everyone,
How aeration and agitation can influence the mixing of liquid in vortex fermenter?
what are the other significant factors that can influence the mixing capacity in vortex fermenter.
With regards,
Dipak Das
. 1993;58(4):331-6.J Chem Technol Biotechnol
doi: 10.1002/jctb.280580404
In general mixing is improved by energy input. In a STR input comes from stirring and gas input. In a vortex fermentor the gas input comes from the system by stirring, so I assume its input does not count. However, gas entering the stirrer reduces the power input by stirring.
The dependency on power input is small (power 1/3).
In STR's tangential circulation is reduced by baffles to improve mixing by turbulence rather than by the circulation that is less effective to create turbulence. But inserts have a negative effect on the gas sucking, which however might be compensated by increasing the stirrer power input.
I could not reach the paper mentioned above, just the abstract, but that promised evaluated data that may be interesting. Also you could have a look at our general
Chapter Mixing in Bioreactor Vessels
though vortex fermentors are not discussed.
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