As industry continues to develop, the amount of various recalcitrant substances that cannot be removed by conventional wastewater treatment has increased in modern society. The SCFs (Soluble Cutting Fluids) used in metalworking processes contain many chemical substances, such as mineral oils, anticorrosive agents, extreme-pressure additives and stabilizers, as well as high concentrations of organics. Recently, electrolysis has been expected to become an alternative to conventional processes and to be useful in various wastewater treatments. Electrolysis is a highly adaptable industrial wastewater treatment method, having a high efficiency, short processing time, and simple equipment composition, regardless of the biodegradable nature of the contaminants. The effects of operating time, current density, and electrolyte on COD removal of waste SCFs have been studied using the stainless steel (SUS316) electrode in a batch type reactor. The results were as follows. ① Without electrolytes, when the current density was adjusted to 40 A/m2, 60 A/m2, and 80 A/m2, the removal efficiencies of the COD were 25.0%, 37.7%, and 49.1% after 60 min, respectively. ② In the comparison between NaCl (5 ~ 10 mM) addition and non-addition, the removal efficiency with NaCl was higher than for without after 60 min for all current densities. ③ In the comparison between Na2SO4 (5 ~ 10 mM) addition and nonaddition, the removal efficiency with Na2SO4 showed no significant difference to that with NaCl at all current densities.

Abstract
 I. 서 론
 II. 실험장치 및 방법
  1. 시료성상
  2. 실험 장치
  3. 실험 방법
 III. 연구 결과
  1. 전류밀도에 따른 COD 처리 특성
  2. 전해질 종류 및 농도 따른 COD 처리 특성
   2.1. NaCl의 영향
   2.2. Na2SO4의 영향
 IV. 결 론
 사 사
 References

• 장성호(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University) | Seong-Ho Jang
• 김고은(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University) | Go-Eun Kim Corresponding author
• 배종명(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University) | Jong-Myeong Bae
• 이병인(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University) | Pyong-In Yi
• S. Sivakumar(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University)
• 정은상(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University) | Eun-Sang Jung
• 이재용(경운대학교 보건바이오학과, Department of Healthcare & Biotechnology, Kyungwoon University) | Jae-Yong Lee
• 박진식(부산대학교 바이오환경에너지학과, Department of Bio-Environmental Energy, Pusan National University) | Jin-Sick Park
• 류재용(경남대학교 도시환경공학과, Department of Environmental Engineering, Kyungnam University) | Jae-Yong Ryu