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Effect of Water-Back-Flushing Time on Recovery Efficiency in Ceramic Filtration System for Paper Wastewater Treatment  

Park Jin Yong (한림대학교 자연과학대학 환경시스템공학과)
Publication Information
Membrane Journal / v.14, no.4, 2004 , pp. 329-338 More about this Journal
Abstract
In this study the discharged wastewater from paper manufacturing plant was filtrated by 4 kinds of tubular ceramic microfiltration and ultrafiltration membranes (carbon material) with periodic water-back-flushing, and we tried to find the optimum back-flushing time (BT). As results of water-BT effect for each ceramic membrane, the longer BT was more effective for a membrane having the larger pore size. And we could acquire the most volume of total permeate and the highest recovery efficiency of purified water, Then, the results of permeate flux vs. initial permeate flux during 180 min's operation showed that the longer BT was more effective for longer filtration time (FT) to obtain the higher permeate flux because membrane fouling proceeded deeply at long FT condition. And the optimum BT that founded from the trends of membrane fouling resistances almost accorded with the optimum BT from the trends of permeate flux, too.
Keywords
water-back-flushing; ceramic membrane; recovery efficiency; paper wastewater;
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