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Advanced Water Treatment of High Turbidity Source by Hybrid Process of Ceramic Microfiltration and Activated Carbon Adsorption: Effect of Water-back-flushing Time and Period  

Park, Jin-Yong (Department of Environmental Sciences & Biotechnology, Hallym University)
Lee, Hyuk-Chan (Department of Environmental Sciences & Biotechnology, Hallym University)
Publication Information
Membrane Journal / v.19, no.1, 2009 , pp. 7-18 More about this Journal
Abstract
In this study, we used the hybrid module that was composed of granular activated carbons (GAC) packing between module inside and outside of tubular ceramic microfiltration membrane for advanced drinking water treatment. Instead of natural organic matters (NOM) and fine inorganic particles in natural water source, modified solution was prepared with humic acid and kaolin. We were investigated effect of water-back-flushing time (BT) and water-back-flushing period (FT) to minimize membrane fouling and to enhance permeate flux (J) in the hybrid process, and tried to find the optimal operating conditions. As a result, resistance of membrane fouling ($R_f$) was slightly decreased according to increasing BT. Also, the shorter FT was the more effective to reduce $R_f$ and to enhance J because of frequent water-back-flushing. However, the optimal BT and FT conditions were 10 sec and 8 min respectively when operating costs were considered. Then, the optimal conditions derived from our experiments of modified solution were applied to lake water treatment. As a result, average treatment efficiencies of turbidity, $UV_{254}$ absorbance, and $COD_{Mn}$ were very high as 99.11%, 91.40% and 89.34%, respectively, but that of TDS was low as 30.05%.
Keywords
ceramic membrane; GAC; hybrid process; microfiltration; water treatment;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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