Soluble Cutting Fluids (SCFs) have been used in metal machining processes to improve the quality of metal processing equipment and products. Although SCFs are useful and essential material, wasted soluble cutting fluids are harmful in hydroecological systems because of the high concentration of COD and nitrogen material. If discharged to hydroecological systems without specific treatment, they may cause eutrophication in rivers and lakes. Therefore, the removal efficiency of the COD contained in the SCFs is investigated in this study using electrochemical treatment with an insoluble electrode. The electrode was made of titanium with iridium plating, made from a perforated metal sheet to agitate the sample in the reactor. Cathode and anode electrodes were inserted into acrylic reactor alternately and the reaction time was one hour. The experimental results were as follows: First, for 60 A/m2, 80 A/m2, and 100 A/m2 current densities, the COD removal efficiencies were 42.0%, 63.9%, and 78.4%, respectively.

• 양승빈(부산대학교 바이오환경에너지학과) | Seung-Bin Yang (Department of Bio-Environmental Energy, Pusan National University)
• 장성호(부산대학교 바이오환경에너지학과) | Seong-Ho Jang (Department of Bio-Environmental Energy, Pusan National University) Corresponding author
• 홍성철(부산대학교 바이오환경에너지학과) | Sung-Chul Hong (Department of Bio-Environmental Energy, Pusan National University)
• 서정민(부산대학교 바이오환경에너지학과) | Jeong-Min Suh (Department of Bio-Environmental Energy, Pusan National University)
• 송영채(한국해양대학교 환경공학과) | Young-Chae Song (Department of Environmental Engineering, Korea Maritime and Ocean University)
• 정병길(동의대학교 환경공학과) | Byung-Gil Jung (Department of Environmental Engineering, Dong-Eui University)
• 이원기(부경대학교 고분자공학과) | Won-ki Lee (Department of Polymer Engineering, Pukyong National University)