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KMID : 1171820030180040045
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Journal of Environmental and Sanitary Engineering
2003 Volume.18 No. 4 p.45 ~ p.51
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A Study on Removal of Color in Dyeing Wastewater by Ozone Oxidation
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Chung Soon-Hyung
Choi Joon-Ho
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Abstract
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This study was conducted to remove the color in dyeing wastewater by ozone oxidation process, and the results were sununarized as follows; The 18.3% of BOD and 56.3% TOC were removed as. decreasing with pH 1 in dyeing wastewater, containing the polyester reducing process. It showed that terephthalic acid was precipitated at low pH The color of dyeing wastewater was removed by the fIrst order reaction, and the reaction rate constants at pH 3, 7, 12were investigated 0.234 min-I, 0.215 min-l and 0.201 min-l respectively. It showed that color was more effectively removed with direct reaction of ozone than radical reaction(non-direct reaction). As increasing of the water temperature, the reaction rate constants were increased slightly. It indicated that activity of ozone was improved at high water temperature.
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KEYWORD
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dyeing wastewater treatment, ozone oxidation, color removal
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