Characterization of Gas-Liquid Contact System for Ozone Water Treatment Bubble Column M. Bataller, A. Márquez, D. Lodos, A. Hernández. Ozone Research Center, Cuba. The objective of this study was to characterize the hydrodynamic behavior of a pilot scale bubble column. The mixing study proceeds with the experimental determination of the residence time distribution (RTD) by means of tracer test at a variety of gas and liquid flowrates. Liquid flow behavior was evaluated from different mathematical models using a computer software. The effect of some hydraulic parameters and bubble size on the extent of dispersion were evaluated. On the other hand, the profiles of dissolved ozone in water along the column were determined. This study makes possible the improvement ozone process efficiency, thereby to evaluate design and operating conditions alternative for the same type of existing contactors equipped with identical gas diffusion system. Source: 2nd International Symposium on Ozone Applications Havana, Cuba - Mach 24-26, 1997.