전기분해에 의해 제조된 NaOCl을 이용한 염색폐수의 처리 특성(II)

Characteristics of Color and COD Removal of Dyeing Wastewater Using Electrolytically Produced NaOCl Solution(II)

  • 윤용수 (단국대학교 화학공학과) ;
  • 하범용 (단국대학교 화학공학과)
  • Yoon, Yong-Soo (Department of Chemical Engineering, Dankook University) ;
  • Ha, Beom-Yong (Department of Chemical Engineering, Dankook University)
  • 발행 : 2006.08.01

초록

This study was performed to determine the feasibility of electrolytically produced NaOCl solution for the treatment of dyeing wastewater discharged from textile industry. Industrial dyeing wastewater was pre-treated by PAC coagulant and the optimal pH and dosage for coagulation were 6.5 and 0.05 v/v%, respectively In this pre-treatment process $COD_{Mn}$, color and suspended solids removal efficiency were 66%, 91% and 85%, respectively. After pre-treatment by coagulation, NaOCl solution made by electrolysis was used for the treatment of industrial wastewater. The optimal mixing ratio with NaOCl solution and dyeing wastewater was determined to be 1:5 at pH 5.0 and in these conditions, color and removal efficiency were 99% and 88%, respectively. From these results, we can expect that NaOCl solution produced by electrolysis with salt of a lower price can be used for the treatment of industrial dyeing wastewater conveniently and effectively, and can overcome disadvantage of a commercial NaOCl solution with a bad storage and delivery properties to decreas oxidation ability.

키워드

참고문헌

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