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Characteristics of residuals from the 2nd-stage microfiltration in a dual membrane process  

Lee, Seung Ryul (건국대학교 환경공학과)
Kweon, Ji Hyang (건국대학교 환경공학과)
Hur, Hyung Woo (한화건설 기술연구소)
Yeon, Kyeong Ho (한화건설 기술연구소)
Park, Ki Young (건국대학교 사회환경시스템공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.23, no.1, 2009 , pp. 31-37 More about this Journal
Abstract
Low-pressure membrane processes have been extensively expanded their applications to drinking water production in a few decades. As a capacity of a membrane plant becomes greater in recent years, proper methods to increase water production as well as to treat residuals have drawn great attention. A possible treatment option for the better water production is to apply a dual membrane system. The second stage microfiltration was installed and operated for approximately six months. The residuals from the two stage microfiltration were investigated to learn their characteristics in settling and dewatering processes. The settlability of the membrane residuals were greatest at the SS concentration of approximately 15000mg/L. The proper dose of the polyelectrolytes for filterability were obtained in the range of 0.5~1%. In the dosage range, the water contents of the membrane residuals were greater but the SRF were lower than the residual from the conventional process.
Keywords
MF membrane filtration; immersed type; dual membrane process; residual; dewatering;
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