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Effect of Coagulation in Coagulation/Ultrafiltration Hybrid System in Water Treatment Process  

Moon, Seong-Yong (Water Environment and Remediation Center, Korea Institute of Science and Technology)
Lee, Sang-Hyub (Water Environment and Remediation Center, Korea Institute of Science and Technology)
Kim, Seung-Hyun (Department of Civil Engineering, Kyungnam University)
Yoon, Cho-Hee (Energy & Chemical Engineering, Kyungnam University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.8, 2005 , pp. 837-843 More about this Journal
Abstract
Coagulation influence was evaluated as the pretreatment for ultrafiltration. Coagulation was expected to improve water quality, reduce membrane fouling and increase backwash effect. Continuous operation of UF was employed in order to investigate the influence of coagulation. Alum, PACS and Ferric chloride were used as coagulants separately. From the result of the research, coagulation can improve the treated water quality greatly. Organic removal was increased more than turbidity and showed an improvement of 30.6% at most. All three coagulants presented conspicuous reduction of membrane fouling, among which PACS was the most effective with long term run. Backwash effect differed with different coagulants while Ferric chloride turned out to be the most effective one. The optimum dosage of coagulant resulted in the highest backwash efficiency.
Keywords
Membrane; Coagulation; Ultrafiltration; Water Treatment;
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