Enhancement of oxygen transfer in highly viscous non-newtonian fermentation broths |
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Authors: | Kawase Y Tsujimura M |
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Institution: | Biochemical Engineering Research Center, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350, Japan. |
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Abstract: | The influence of short draft tubes covered by perforated plates on gas-liquid mass transfer was examined in external-loop airlift bioreactors. The volumetric mass transfer coefficients in a model external-loop airlift bioreactor were measured with water and non-Newtonian media. It was found that introduction of draft tubes covered with perforated plates in the riser significantly improved the mass transfer rate, particularly in higher viscous non-Newtonian fermentation media. The enhancement of mass transfer rate might be due mainly to an increase in bubble coalescence and redispersion. (c) 1994 John Wiley & Sons, Inc. |
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Keywords: | oxygen transfer perforated plate external-loop airlift non-Newtonian media |
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