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Advanced Water Treatment of High Turbidity Source by Hybrid Process of Photocatalyst and Ceramic Microfiltration: Effect of Organic Materials in Water-back-flushing  

Park, Jin-Yong (Department of Environmental Sciences & Biotechnology, Hallym University)
Lee, Gwon-Seop (Department of Environmental Sciences & Biotechnology, Hallym University)
Publication Information
Membrane Journal / v.21, no.1, 2011 , pp. 72-83 More about this Journal
Abstract
For advanced drinking water treatment of high turbidity water, we used the hybrid module that was composed of photocatalyst packing between outside of tubular ceramic microfiltration membrane and membrane module inside. Photocatalyst was PP (polypropylene) bead coated $TiO_2$ powder by CVD (chemical vapor deposition) process. Instead of natural organic matters (NOM) and fine inorganic particles in natural water source, modified solution was prepared with humic acid and kaolin. Water-back-flushing of 10 sec was performed per every period of 10 min to minimize membrane fouling. Resistance of membrane fouling ($R_f$) decreased and J increased as concentration of humic acid changed from 10 mg/L to 2 mg/L, and finally the highest total permeate volume ($V_T$) could be obtained at 2 mg/L. Then, treatment efficiencies of turbidity and $UV_{254}$ absorbance were above 98.5% and 85.7%, respectively. As results of treatment portions by membrane filtration, photocatalyst adsorption, and photo-oxidation in MF, MF + $TiO_2$, and MF + $TiO_2$ + UV processes, turbidity was treated little by photocatalyst adsorption, and photo-oxidation. However, treatment portions of humic acid by adsorption and photo-oxidation were above 10.7 and 8.6%, respectively.
Keywords
ceramic membrane; photocatalyst; hybrid process; microfiltration; water-back-flushing;
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Times Cited By KSCI : 13  (Citation Analysis)
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