Zlokarnik (1980) discussed how the increase in the hydrostatic pressure raises the oxygen concentration inside the air bubbles and the equilibrium concentration at the air/water interface, as well as the effects of temperature, which may change in tall bubble columns.
An estimate of the influences of pressure on OTE and OTR as well as the change in bubble surface, mass transfer coefficient and saturation concentration was presented by Popel et al. (1998). These considerations were complemented by measurements in a pilot plant with a water depth of up to 12.5 m.
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