Abstract
Abstract Tracer studies were performed in bench and pilot scale ozone diffusion contactors to determine actual contact times for the bench and pilot scale units and to characterize the flow pattern through these reactors. It was recognized that the flow pattern through the ozone contactors approached plug flow conditions. Due to the short circuiting and dispersion, the actual detention time in the reactors was one-half of the theoretically calculated detention time. Actual values of observed detention time were used in calculations of the “CT” values for ozone in the water. Optimization of ozone dose and contact time for “CT” calculations was performed in the pilot plant. Operational guidelines for the application of ozone in Union Hills pilot plant were developed based on the data obtained in the pilot plant runs.
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