전기분해에 의해 제조된 NaOCl을 이용한 염색폐수의 처리 특성(II) = Characteristics of Color and COD Removal of Dyeing Wastewater Using Electrolytically Produced NaOCl Solution(II)

다국어 초록 (Multilingual Abstract)

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.

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