1988 年 21 巻 1 号 p. 20-24
The volume-surface mean diameter of bubbles dvs was measured using the electroresistivity probe method. From the mean bubble diameter and volumetric mass transfer coefficient kLa, interfacial area a and mass transfer coefficient kL were obtained. The solid phase, Ca-alginate gels, had almost no effect on bubble breakup, and a decrease in kLa with decreasing gel diameter was found to be caused by the corresponding decrease in kL. The mean bubble diameter increased significantly with increasing particle concentration. The value of kL was not affected by particle concentration. Thus, a decrease in kLa with increasing particle concentration was mainly attributed to the corresponding decrease in interfacial area. Dimensionless correlations were proposed for dva, a and kL.