Liquid circulation in external-loop airlift bioreactors.
A simple model for prediction of liquid velocity in external-loop airlift bioreactors has been developed. Theoretical correlations for friction factor of gas-non-Newtonian two-phase flows and for liquid velocity in the riser were derived using the concept of an eddy diffusivity. The predictions of the proposed model were compared with the available experimental data for the friction factor and the liquid velocity in the riser of external-loop airlift contactors. Satisfactory agreement was obtained.
Kawase
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Center for Biotechnology Research, Department of Mechanical Systems Engineering, Kanazawa Institute of Technology, Nonoichi, Ishikawa, Japan 921.