Soluble cutting fluids (SCFs) have been used in metal machining processes to improve the quality of metal processing equipment and products in modern society. Because the characteristics among metal machining processes differ, various types of cutting fluids are manufactured to enhance the cutting efficiency of different metals. Although SCFs are useful and essential materials, particular treatment is required attributable to the high concentration of nitrogen materials and chemical oxygen demand (COD). In this study, the removal efficiency of total nitrogen (T-N) contained in SCFs was analyzed using electrochemical treatment. The electrode was made of 316 stainless steel, which had been perforated to prevent an imbalanced sample concentration in the reactor. Cathodic and anodic electrodes were alternately inserted into an acrylic reactor. The removal efficiency of T-N in SCFs using 40 A/m2, 60 A/m2, and 80 A/m2 current density, was 48.2%, 61.5% and 69.3%, respectively. The removal efficiency of T-N in SCFs with the addition of 0, 5 mM, and 10 mM NaCl was 69.3%, 74.6%, 77.6%, respectively.

• 장성호(부산대학교 바이오환경에너지학과) | Seong-Ho Jang (Department of Bio-Environmental Energy, Pusan National University)
• 양승빈(부산대학교 바이오환경에너지학과) | Seung-Bin Yang (Department of Bio-Environmental Energy, Pusan National University) Corresponding author
• 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)
• SSivakumar(부산대학교 바이오환경에너지학과) | S. Sivakumar (Department of Bio-Environmental Energy, Pusan National University)
• 정은상(부산대학교 바이오환경에너지학과) | Eun-Sang Jung (Department of Bio-Environmental Energy, Pusan National University)
• 정태화((주)KED) | Tae-Hwa Jung (KED Co.,Ltd)