10.2190/2K0M-7KUT-G8J8-MKWT 2K0M7KUTG8J8MKWT 5 Performance Characteristics of A Packed-Bed Ozone Contactor 73 87 20020509 20020509 20020509 20020509 2K0M7KUTG8J8MKWT.pdf http://baywood.metapress.com/link.asp?target=contribution&id=2K0M7KUTG8J8MKWT 1 Sheng H. Lin Chi F. Peng Yuan Ze Institute of Technology, Taiwan, ROC Performance characteristics of a packed-bed ozone contactor were investigated. A yellow dye was employed as the tracer to test the dispersion characteristics of the ozone contactor in the single-phase (liquid) and two-phase (countercurrent liquid/air) flow systems. the one-parameter (tanks-in-series) and two-parameter (combined plug-flow/tanks-in-series) models were employed to fit the observed residence time distribution (RTD) functions. It was found that for the one-parameter model, at least twenty well-mixed tanks are required to reasonably fit the observed RTD functions, while for the two-parameter model, only fewer well-mixed tanks plus a plug flow reactor are needed to yield the same fit. the dispersion characteristics of flow in the ozone contactor could also be represented by the dispersion model with appropriate dispersion numbers. the experimental residence time distribution functions were employed in conjunction with the reaction kinetics to determine the discolorization of dyestuff by ozonation in the packed bed reactor. the experimental observations appeared to reasonably confirm the theoretical predictions. Metcalf & Eddy, Inc., <i>Wastewater Engineering: Treatment, Disposal and Reuse</i> (3rd Edition), McGraw-Hill, New York, 1991. T. D. Reynolds, <i>Unit Operations and Processes in Environmental Engineering</i>, Wadsworth, Inc., Belmont, California, 1982. C. R. Baillod, B. M. Faith, and O. Masi, Fate of Specific Pollutants during Wet Air Oxidation and Ozonation, <i>Environmental Progress, 1</i>, p. 217, 1982. J. N. Foussard, H. Delbellefontaine, and J. Besombes-Vailhe, Efficient Elimination of Organic Liquid Wastes: Wet Air Oxidation, <i>Journal of Environmental Engineering, ASCE, 115</i>, p. 367, 1989. L. Li, P. Chen, and E. F. Gloyna, Generalized Kinetic Model for Wet Oxidation of Organic Compounds, <i>AIChE Journal, 37</i>, p. 1687, 1991. S. H. Lin and T. S. Chuang, Wet Air Oxidation and Activated Sludge Treatment of Phenolic Wastewater, <i>Journal of Environmental Science & Health, A29</i>, p. 547, 1994. S. H. Lin and W. Y. Liu, Treatment of Textile Wastewater by Ozonation in a Packed-Bed Reactor, <i>Environmental Technology, 15</i>, p. 299, 1994. D. M. Himmelblau and K. B. Bischoff, <i>Process Analysis and Simulation</i>, John Wiley, New York, 1968. O. Levenspiel, <i>Chemical Reaction Engineering</i> (2nd Edition), John Wiley, New York, 1962. C. Y. Wen and L. T. Fan, <i>Models for Flow System and Chemical Reactors</i>, Marcel Dekker, New York, 1986. APHA, <i>Standard Methods for Water and Wastewater Examination</i> (17th Edition), American Public Health Association, Washington, D. C., 1992.