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Correlation of liquid dispersion and oxygen transfer in bubble column

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Summary

In steady state, attained by continuous aeration after oxygen saturation of water in a bubble column, vertical composition distribution of liquid and gas phases has been determined. It has been assumed that, as a result of absorption at the bottom of the column, desorption in the upper section and vertical dispersion of dissolved oxygen flux, a closed oxygen circulation is created. Determination of the axial dispersion coefficient from hydrodynamic and oxygen transfer data verifies the mathematical model proposed. The results allow conclusions to be drawn about supersaturation and desorption and other phenomena expected in biological systems.

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Abbreviations

C′[-]:

Dimensionless oxygen concentration Unit=0.21 bar oxygen partial pressure or dissolved oxygen level in equilibrium with latter

E[m2/s]:

Axial dispersion coefficient

F[m2]:

Horizontal cross-section area

k L a[s-1]:

Overall oxygen transfer coefficient

u; u 2[m/s; cm/s]:

Superficial velocity: related to state of bubbles leaving the sparger

x; x atm[-]:

Signal registered in the experiment; signal recorded in O2 saturated water, or water vapor saturated air stream, at temperature identical to the experiment under atmospheric pressure

y[m]:

Water column height

ϕ[s-1]:

Dimensionless oxygen flux

a :

asorption

d :

desorption

g :

gas

l :

liquid

k :

dispersion

m :

measured value/in the case of hydrodynamically measured E/

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Authors and Affiliations

  1. Department of Agricultural Chemical Technology, University of Technical Sciences Budapest, Gellért tér. 4, Budapest

    J. Holló, P. Miháltz, L. Czakó & J. Tóth

Authors
  1. J. Holló
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  2. P. Miháltz
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  3. L. Czakó
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  4. J. Tóth
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Dedicated to Professor Dr. H. J. Rehm on the occasion of his 60th birthday

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Holló, J., Miháltz, P., Czakó, L. et al. Correlation of liquid dispersion and oxygen transfer in bubble column. Appl Microbiol Biotechnol 27, 260–264 (1987). https://doi.org/10.1007/BF00252928

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  • DOI: https://doi.org/10.1007/BF00252928

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