Mass Transfer at Mixing Processes

Abstract

In this paper the oxygen transfer in a mixing process is analyzed and measured. The tests were performed in a glass vessel with 30 l water content and a loop mixer was used as a mixing equipment. The results proved a good agreement with K_la values calculated by relationships proposed by the authors of [8] and [9], but the values calculated on the basis of two other papers show significant differences. Moreover, we have found out that the procedure recommended for K_la estimation by the author of [5] is not quite correct, because it does not consider the changes in the oxygen electrode time delay. A new non-dimensional relationship was proposed for K_l a calculation and the results obtained showed good agreement between theory and practice.