Abstract. This paper shows a comparison of three different empirical correlations found in the literature for the estimation of the oxygen transfer coefficient in an aeration pilot plant using a phenomenological-based semi-physical model (PBSM). The relationship between each empirical correlation and the oxygen transfer phenomenon from the gas phase to the liquid phase was assessed. The results showed that empirical correlations of the oxygen transfer coefficient found in the literature are not based on the knowledge of the physical phenomena, and hence are not suitable to generalize the transference mechanism in similar processes.
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