전기 응집법을 이용한 염색 폐수의 처리에서 전류 밀도와전해질의 COD 제거율에 대한 영향 (Effects of Current Density and Electrolyte on COD Removal Efficiency in Dyeing Wastewater Treatment by using Electro-coagulation)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 35권 / 7호 / 653 ~ 659페이지
· 저자명 : 장성호, 김고은, 강정희, 류재용, 이원기, 이재용, 박진식

초록

In the industrial wastewater that occupies a large proportion of river pollution, the wastewater generated in textile,leather, and plating industries is hardly decomposable. Though dyeing wastewater has generally been treated usingchemical and biological methods, its characteristics cause treatment efficiencies such as chemical oxygen demand (COD)and suspended solids (SS) to be reduced only in the activated sludge method. Currently, advanced oxidation technologyfor the treatment of dyeing wastewater is being developed worldwide. Electro-coagulation is highly adapted to industrialwastewater treatment because it has a high removal efficiency and a short processing time regardless of the biodegradablenature of the contaminant. In this study, the effects of the current density and the electrolyte condition on the COD removalefficiency in dyeing wastewater treatment by using electro-coagulation were tested with an aluminum anode and a stainlesssteel cathode. The results are as follows: ① When the current density was adjusted to 20 A/m2, 40 A/m2, and 60 A/m2under the condition without electrolyte, the COD removal efficiency at 60 min was 62.3%, 72.3%, and 81.0%, respectively.
② The removal efficiency with NaCl addition was 7.9% higher on average than that with non-addition at all currentdensities. ③ The removal efficiency with Na2SO4 addition was 4.7% higher on average than that with non-addition atall current densities.

영어초록

In the industrial wastewater that occupies a large proportion of river pollution, the wastewater generated in textile,leather, and plating industries is hardly decomposable. Though dyeing wastewater has generally been treated usingchemical and biological methods, its characteristics cause treatment efficiencies such as chemical oxygen demand (COD)and suspended solids (SS) to be reduced only in the activated sludge method. Currently, advanced oxidation technologyfor the treatment of dyeing wastewater is being developed worldwide. Electro-coagulation is highly adapted to industrialwastewater treatment because it has a high removal efficiency and a short processing time regardless of the biodegradablenature of the contaminant. In this study, the effects of the current density and the electrolyte condition on the COD removalefficiency in dyeing wastewater treatment by using electro-coagulation were tested with an aluminum anode and a stainlesssteel cathode. The results are as follows: ① When the current density was adjusted to 20 A/m2, 40 A/m2, and 60 A/m2under the condition without electrolyte, the COD removal efficiency at 60 min was 62.3%, 72.3%, and 81.0%, respectively.
② The removal efficiency with NaCl addition was 7.9% higher on average than that with non-addition at all currentdensities. ③ The removal efficiency with Na2SO4 addition was 4.7% higher on average than that with non-addition atall current densities.

참고자료

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