The objective of this study is to propose optimum operating conditions in the treatment of the plating wastewater by using the hybrid process of Fenton''s oxidation and membrane separation. The supernatant after pre-treatment of Fenton''s oxidation was fed to membrane separation process. Optimum conditions for Fenton''s oxidation were pH 4 with dosage of H2O2and FeSO47H2O being 550mg/L and 500mg/L, respectively. The best conditions for the supernatant treatment were found to be pH 8.5 and operating pressure of 4.2 kgf/㎠ in the membrane separation when reverse osmosis (RO) membrane of spiral wound type was used. The final treatment water quality was 14.44 mg/L, 0.02mg/L, 0.01mg/L, 0.16mg/L and 0.43mg/L in concentrations of COD, Cr3+, Cr6+, CN-and Zn2+, respectively and pH 7.8. It was found that the final water was recyclable to the plating process without further adjustment of pH.

본 연구의 목적은 펜턴사환와 막분리의 혼성공정에 의해 도금폐수를 처리할 때의 최적운전조건을 찾는데 있다. 펜턴산화로 전처리한 후의 상등액을 막분리공정에 유입시켰다. 펜턴산화반응의 최적운전조건은 pH 4에서 H2O2와 FeSO47H2O의 주입량이 각각 550mg/L 및 500mg/L이었다. 나권형 역삼투막을 이용한 막분리는 pH 8.5와 운전압력 4.2kgf/㎠일 때 최적의 효과를 나타내었다. 최종처리수의 COD, Cr3+, Cr3+,CN-및 Zn2+의 농도는 각각 14.44mg/L, 0.02mg/L, 0.01mg/L, 0.16mg/L 및 0.43mg/L이었으며, pH는 7.8로써 pH 조절없이 도금공정의 세척수로 재사용할 수 있을 것으로 사료된다.