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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...
In this paper, the effect of coagulation on membrane filtration resistance had been studied in the process of membrane filtration with dosing coagulants, analyzed the contribution of different membrane resistance in the membrane process, in order to find an effective way to control the membrane resistance. By Carman-Kozeny formula analyzed, voidage and deposited particle size of the composite cake...
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...
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, the relationship of membrane fouling rates and the operation conditions of Clarification Membrane process had been investigated with Response Surface Methodology (RSM). Base on the data of operation conditions experiment, including: filtration flux, backwashing pressure (the ratio of the pressure of backwashing/filtration), backwashing rate (the ratio of backwashing time/filtration...
Phenol is a highly toxic and carcinogenic compound and its biological treatment has been broadly agreed that it is economical, practical and it leads to a complete removal of phenol (degraded to inorganic, CO2 H2O etc.). The effect of acclimated activated sludge in the phenol biodegradation has been studied. First, the batch acclimated period have been performed gradually by elevated the activated...
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