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Membrane Separation and Treatment
Membrane separation technology in the application for water supply augmentation has been well recognised and is getting an important role in water treatment. The family of membrane processes is now very diverse. They are generally classified as microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO). Water with desirable quality can be produced with the combination of MF/RO, UF/RO or MF/NF. The major problem in the membrane separation processes is the membrane fouling. For a given water source, it is important to have a good understanding of what membrane foulants are, how they occur and accumulate and how the membrane surface properties and morphology affect the membrane fouling. The overall goal of the research project proposed here is to evaluate the fouling mechanism on RO membrane surface in the Singapore Newwater production
Fouling Mechanism on RO Membrane Surface in Newater Production
Membrane fouling control systems
In Singapore Newater factory, the biologically treated wastewater is first pretreated with MF membrane and then fed into RO system. The fouling can be caused by inorganic, organic and biological foulants. The research contents of the proposed project include analysis of the contaminants and their concentrations in the feed water and the permeate so as to identify what contaminants are dominant foulants; characterization of the relationships among the properties of the foulants and morphology and chemical properties of the membranes; and study on the membrane performance as a function of operating conditions.