@article{Painmanakul_Wachirasak_Jamnongwong_Hebrard_2009, title={Theoretical Prediction of Volumetric Mass Transfer Coefficient (k<sub>L</sub>a) for Designing an Aeration Tank}, volume={13}, url={https://engj.org/index.php/ej/article/view/64}, DOI={10.4186/ej.2009.13.3.13}, abstractNote={<p>The objective of this present paper is to propose a new theoretical prediction method of the volumetric mass transfer coefficient (k<sub>L</sub>a) occurring in a gas-liquid contactor based on the dissociation of the liquid-side mass transfer coefficient (k<sub>L</sub>) and the interfacial area (a). The calculated results have been compared with those obtained with the experimental process in a small-scale bubble column. Tap water was used as liquid phase and an elastic membrane with a single orifice as gas sparger. Only the dynamic bubble regime was considered in this work (Re<sub>OR</sub>= 1501000 and We = 0.0024). This study has clearly shown that, whatever the operating conditions under test, the generated bubble diameters (dB), bubble frequency (f<sub>B</sub>) and their associated rising velocities (U<sub>B</sub>) were the important parameters in order to predict, not only the values of k<sub>L</sub>a, but also the values of a and of k<sub>L</sub>. Moreover, these obtained results could provide a better understanding of the parameters which influence the oxygen transfer mechanism in the aeration process. By using the correlations to estimate these bubble hydrodynamics (d<sub>B</sub> and U<sub>B</sub>), it diminishes times for measuring the associated mass transfer parameters and also their experimental complexities and errors.</p>}, number={3}, journal={Engineering Journal}, author={Painmanakul, Pisut and Wachirasak, Jidapa and Jamnongwong, Marupatch and Hebrard, Gilles}, year={2009}, month={Sep.}, pages={13-28} }