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Treatment of Dyeing Wastewater Using Polyamid Ro-Membranes After the Pretreatment with Chemical Coagulants  

Jegal Jonggeon (한국화학연구원, 응용화학연구부)
Mo Joonghwan (한국화학연구원, 응용화학연구부)
Hwang Jeong-Eun (한국화학연구원, 응용화학연구부)
Lee Kew-Ho (한국화학연구원, 응용화학연구부)
Kim Jaephil (서울대학교 공과대학 재료공학부)
Publication Information
Membrane Journal / v.14, no.3, 2004 , pp. 230-239 More about this Journal
Abstract
Treatment of a dyeing wastewater was carried out using polyamide RO-membranes. Before applying the wastewater to the membrane process, it was pretreated with various chemical coagulants such as alum, ferric chloride and HOC-100A. In order to see the effect of the pretreatment on the membrane separation process, the optimum conditions for the coagulation and sedimentation process were sought. As a result, by the pretreatment, for all the coagulants used, the chemical oxygen demand (COD) and UV-absorbance of the wastewater were lowered by more than 70%. The pretreated wastewater was then applied to the membrane process. The effect of the coagulants used for the pretreatment on the membrane fouling was studied. From this study, it was found that the HOC-100A was the best out of the coagulants used for the removal of the materials that could cause membrane fouling.
Keywords
pretreatment; chemical coagulant; membrane process; dyeing wastewater; RO-membrane;
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