(5u) Photoreactive Ultrafiltration Membranes for Prevention of Biofouling

Growing stresses on water supplies worldwide necessitate the efficient use and reuse of fresh water. Membrane filtration can be used to purify even low-quality sources. However, biofouling and biofilm growth are major obstacles for membrane filtration because they cause dramatic losses in efficiency and system flux. By coating ceramic ultrafiltration membranes with TiO2, we have created a photoreactive membrane that resists fouling and biofilm growth by improving hydrophilicity, inactivating microorganisms, and degrading organics. In recent work we have identified Degussa P25 as a strong candidate for biofilm prevention based on its excellent bacterial cell attachment resistance and high organic degradation activity. In this poster, we will present work on the selection of catalyst materials, results that show biofilm prevention and reduced flux decline, as well as the incorporation of this membrane material into a rotating reactive filtration system.