Solid—liquid mass transfer in a shaking vessel for a bioreactor with “current pole”

A shaking vessel with “current pole”, which is a center pole installed at the bottom, had shorter mixing time than a shaking vessel with a cone at the bottom. The mass transfer rate on the suspended particles was also measured in the shaking vessel where ion-exchange resin beads were used as the suspended particles. The dependence of the solid-liquid mass transfer coefficient on the circulating frequency changed at the critical circulating frequency for complete suspension N_JS. For a circulating frequency higher than N_JS, the mass transfer coefficient was correlated with the power consumption per unit volume, regardless of presence or not of the current pole.