OZONE/CERAMIC MEMBRANE HYBRID SYSTEM: CATALYTIC EFFECT AND ITS APPLICATION IN DISINFECTION BYPRODUCTS(DBPs) CONTROL AND MICROPLLUTANT DECOMPOSITION

Abstract

In drinking water treatment, ozone and ceramic membrane have gained popularity since ozone can be used as a pretreatment to alleviate membrane fouling. When ozone is in contact with ceramic membrane (Al2O3, TiO2 or both), ozone decomposition is catalysed to yield more hydroxyl radicals to react with micropollutants or natural organic matters (NOM). However, such catalytic effect claimed by researchers has not systematically been studied in terms of DBPs controls and micropollutant decomposition. This research studied the catalytic effect in ozone/ceramic membrane by validating and quantifying with Rct method. It was also found that smaller pore-size membrane might play an important role in promoting this catalytic effect. In addition, the catalytic effects of ozone with different catalysts of GO, rGO, FeO and MnO were compared. It was found that the quantity of the catalyst needs to controlled in order for the catalytic effect to be evident.