Comparison of various advanced oxidation processes and chemical treatment methods for COD and color removal from a polyester and acetate fiber dyeing effluent

Abstract

In this paper, a comparison of various advanced oxidation processes (O 3, O 3/UV, H 2O 2/UV, O 3/H 2O 2/UV, Fe 2+/H 2O 2) and chemical treatment methods using Al 2(SO 4) 3 · 18H 2O, FeCl 3 and FeSO 4 for the chemical oxygen demand (COD) and color removal from a polyester and acetate fiber dyeing effluent is undertaken. Advanced oxidation processes (AOPs) showed a superior performance compared to conventional chemical treatment, which maximum achievable color and COD removal for the textile effluent used in this study was 50% and 60%, respectively. Although O 3/H 2O 2/UV combination among other AOPs methods studied in this paper was found to give the best result (99% removal for COD and 96% removal for color), use of Fe 2+/H 2O 2 seems to show a satisfactory COD and color removal performance and to be economically more viable choice for the acetate and polyester fiber dyeing effluent on the basis of 90% removal.