Effect of heated aluminum oxide particles dynamic membranes on polymeric and ceramic microfiltration membrane

摘要

Membrane fouling and resistance in drinking water treatment systems can be considerably reduced by precoating or predepositing the dynamic membrane (DM) filtration system using adsorbent particles on the membrane surface. The characteristics and roles of heated aluminum oxide particles (HAOPs) for adsorbent size and surface loading according to membrane type (ceramic: Ce; polymeric: Po) were investigated using ahumic acid (HA) solution. DM filtrations precoated with Ce or Po membranes indicate that fouling occurs in both membranes at the cake layer. In the case of Ce membrane filtration, the effect of foulants was noticeably reduced and irreversible membrane fouling can be alleviated by pretreating the Ce membrane with HAOPs. Permeability is proportional to the adsorbent size and surface loading. The optimum surface loading and particle size of HAOPs on the Ce membrane filtration should be 75 mu m and 0.05 Al g/cm(2), respectively. Using a DM with HAOPs, membrane performance is more enhanced when using the Ce membrane than when using the Po membrane. From these results, it could be concluded that DM filtration with a Ce membrane has potential as an operating system for alleviating membrane fouling.