10.2190/81U5-XGCN-GKFK-UA4X 81U5XGCNGKFKUA4X 3 Decolorization of Textile Waste Effluents by Ozonation 143 156 20020509 20020509 20020509 20020509 81U5XGCNGKFKUA4X.pdf http://baywood.metapress.com/link.asp?target=contribution&id=81U5XGCNGKFKUA4X 2 Sheng H. Lin Chi M. Lin Department of Chemical Engineering, Yuan Ze Institute of Technology, Taiwan Bench experiments were conducted to investigate the efficiency of ozonation in removing the color (turbidity) and chemical oxygen demand of the textile waste effluents. It has been observed that six hours of ozonation are sufficient to remove most of the color in the waste effluent and up to 50 percent of its COD. The small molecule organic compounds produced by dye decomposition, which contribute significantly to the final COD concentration in the ozonation process, can be easily degraded in an activated sludge process. Combining ozonation and the activated sludge process can provide a very effective means for dealing with this particular type of industrial waste effluent. C. F. Gurnham (ed.), <i>Industrial Waste Control</i>, Academic Press, New York, 1956. R. H. Souther and T. A. Alspaugh, Textile Waste Treatment Studies, <i>Journal of Water Pollution Control Federation, 29</i>, p. 804, 1957. A. Hamza and M. F. Hamoda, Multiprocess Treatment of Textile Wastewater, <i>Proceedings of the 35th Industrial Waste Conference</i>, Purdue University, Lafayette, Indiana, 1980. G. R. Groves and C. A. Buckley, Treatment of Textile Effluents by Membrane Separation Processes, <i>Proceedings of the 7th International Symposium on Fresh Water from the Sea, 2</i>, p. 249, 1980. G. McKay, Color Removal by Adsorption, <i>American Dyestuff Reporter, 69</i>, p. 38, 1980. G. McKay, The Adsorption of Dyestuffs from Aqueous Solutions Using the Activated Carbon Adsorption Model to Determine Breakthrough Curves, <i>Chemical Engineering Journal, 28</i>, p. 95, 1984. J. C. Ginocchio, Elimination of Dyes and Pigments in Municipal Sewage Treatment Plants, <i>Chemie Ingineer Technique, 56</i>, p. 310, 1984. G. R. Brower, Economic Pretreatment for Color Removal from Textile Dye Wastes, <i>Proceedings of the 41st Industrial Waste Conference</i>, Purdue University, Lafayette, Indiana, 1987. J. Paprowicz and S. Slodczyk, Application of Biologically Activated Sorptive Columns for Textile Wastewater Treatment, <i>Environmental Technology Letters, 9</i>, p. 271, 1988. E. H. Snider and J. J. Porter, Ozone Treatment of Textile Wastes, <i>Journal of Water Pollution Control Federation, 46</i>, p. 886, 1974. S. Beszedits, Ozonation to Decolor Textile Effluents, <i>American Dyestuff Reporter, 69</i>, p. 38, 1980. J. M. Green and C. Sokol, Using Ozone to Decolorize Dyeing Plant Wastewater, <i>American Dyestuff Reporter, 74</i>, p. 67, 1985. J. P. Gould and K. A. Groff, Kinetics of Ozonolysis of Synthetic Dyes, <i>Ozone Science and Engineering, 9</i>, p. 153, 1987. R. P. Rice, Ozone for the Treatment of Hazardous Materials, <i>AIChE Symposium Series</i>, No. 209, p. 79, 1981. APHA, AWWA, and WPCF, <i>Standard Methods for the Examination of Water and Wastewater</i>, (16th Edition), Washington, D. C., 1985.