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Hybrid Water Treatment of Tubular Alumina MF and Polypropylene Beads Coated with Photocatalyst: Effect of Nitrogen Back-flushing Period and Time  

Park, Jin Yong (Department of Environmental Sciences & Biotechnology, Hallym University)
Choi, Min Jee (Department of Environmental Sciences & Biotechnology, Hallym University)
Ma, Jun Gyu (Department of Environmental Sciences & Biotechnology, Hallym University)
Publication Information
Membrane Journal / v.23, no.3, 2013 , pp. 226-236 More about this Journal
Abstract
The effect of $N_2$ back-flushing period (FT) and time (BT) was compared with the previous result used PES (polyethersulfone) beads loaded with titanium dioxide photocatalyst in hybrid process of alumina microfiltration and PP (polypropylene) beads coated with photocatalyst in viewpoints of membrane fouling resistance ($R_f$), permeate flux (J), and total permeate volume ($V_T$). The reason of nitrogen back-washing instead of the general air back-washing method is to minimize the possible effect of oxygen included in air on water quality analysis. As decreasing FT, $R_f$ decreased and J and $V_T$ increased. Treatment efficiency of dissolved organic matters (DOM) was 82.0%, which was the higher than 78.0% of the PES beads result. This means that PP beads coated with photocatalyst was the more effective than PES beads loaded with photo-catalyst in the DOM removal. As increasing BT, the final $R_f$ decreased and the final J increased, but $V_T$ was the maximum at BT 15 sec. The average treatment efficiency of turbidity did not have any trend as changing BT. As BT increasing from 6 sec to 30 sec, the treatment efficiency of DOM increased 11.8%, which was a little higher than the result of PES beads.
Keywords
ceramic membrane; photocatalyst; hybrid process; microfiltration; Nitrogen back-flushing;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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