UV-catalyzed hydrogen peroxide treatment of textile wastewater

This paper describes the use of an H2O2/UV oxidation process as an innovati ve technology for the advanced treatment of textile wastewater to meet the new discharge standards of 1998 in Taiwan. The new regulation requires that the discharge COD and color must be less than 100 mg/L and 400 in ADMI uni ts, respectively. The focus of this study was on the evaluation of process removal efficiency as well as the unit operating cost for the treatment of a secondary effluent of textile waste-water. As a result, under the conditi ons of about 560 mg/L of H2O2 and a UV lamp power of the 14 W color can be removed completely with a treatment time of about 20 min, and the maximum C OD removal of approximately 90% can be obtained with a treatment time of ab out 40 min. To reduce the COD from 160 to 100 mg/L, the operating cost incl uding lamp replacement, chemical, and electrical cost is 0.85 US$ per cubic meter wastewater treated.