1. RO History 2. Asymmetric Membranes by Phase Inversion 3. Thin Film Composite (TFC) Membrane 4. Structure and Property Relationship of TFC Membrane 5. Membrane Materials 6. Tranport Mechanism(Model) 7. Membrane Characters in Separation Process 8. Concentration Polarization and Fouling Phenomenon 9. RO Membrane Module Configuration and System Design 10. Futrue Trend in RO Industry

1. Performance of RO membrane depends on chain structure (packing density) 2. Crosslinking of main chain is essential for the high performance RO membranes 3. Various bisphenols and polyaminostyrene can be promising materials for the fabrication of RO membranes. 4. By using of blend technique of reactant, we can expect broad spectrum of RO membrane and synergetic effects in membrane performance.

RO System & Membrance Support Technology Membrance Fouling -Colloidal Fouling -Scale Fouling -Biological Fouling -Chemical Fouling

Advantage of Water -Easy to Get 10$^{7}$ km$^{3}$ except of ice -Economical -Safety -High Solubility(a large relatice dielectronic constant) -Easy to Re-use -Easy to Waste

Membrane Housings -Safety Operation -Cost : Initial, Leng-term -Other Considerations