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The effects of the conditions of nitrogen- and phosphorus-deficiency on the filamentous abundance index (FI), the removal efficiency of pollutants and the membrane fouling were investigated. The results indicated that the removal efficiency of CODCr reduced obviously at nitrogen deficiency and FI was higher than that at phosphorus deficiency. When filamentous bulking happened, FI increased and the...
Compared with the filtration performance of PVDF hollow fiber membrane, pressure-sensitivity of Polyurethane/polyvinylidene difluoride (PU/PVDF) blend membrane filtration was studied. The experiment results showed that while operating either under external pressure or internal pressure, membrane flux and trans-membrane pressure (TMP) of the blend membrane appeared non-linear relationship, membrane...
In this paper, nanosized TiO2 modified ultra-filtration membrane catalyzed ozonation is studied. Firstly, the mechanism of TiO2-catalyzed ozonation process is confirmed and it was also observed that catalytic ozonation were significantly influenced by tert-butyl alcohol, which testified that nanosized TiO2 catalyzed ozonation of organics follows a radical-type mechanism. In comparison of ozonation...
In this study, the Response Surface Methodology, RSM, was adopted to investigate effects of operational conditions including aeration intensity, fiber length and feed concentration. The membrane fouling rate was used to evaluate the effects on the membrane fouling. The results had shown that for one end suction fiber module the Membrane fouling rate (MFR) has been affected by the air sparging and...
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