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Physicochemical Effect on Permeate Flux in a Hybrid Ozone-Ceramic Ultrafiltration Membrane Treating Natural Organic Matter  

Kim, Jeong-Hwan (Department of Environmental Engineering, Inha University)
Publication Information
Membrane Journal / v.18, no.4, 2008 , pp. 354-361 More about this Journal
Abstract
Effects of operational conditions and solution chemistry on permeate flux in a hybrid ozone-ceramic ultra-filtration (UF) membrane system treating natural organic matter (NOM) were investigated. Results showed that the extent of permeate flux decline was higher at higher cross-flow velocity and ozone dosage, but it was higher at lower transmembrane pressure (TMP). The mechanism of fouling mitigation was found to be more dependent upon reaction between ozone and natural organic matter at/near catalytic membrane surface than scouring effect due to ozone gas bubbles. Addition of calcium into model NOM solution at high pH led to significant decline in permeate flux while the calcium effect on permeate flux decline was less pronounced at lower pH. After permeate flux decline during the early stage of filtration, the flux started recovering and approached fully to the initial value of it due to degradation of NOM by catalytic ozonation at ceramic membrane surface in the hybrid ozone-ceramic membrane system.
Keywords
ozone; ceramic membrane; natural organic matter; catalytic ozonation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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