Researchers at King Fahd University of Petroleum and Minerals have developed a modified conductive membrane that filters oily wastewater with less fouling. The team added a hybrid interlayer made of titania nanosheets and graphitic carbon nitride, held in place by a tannic acid and iron scaffold, beneath a polypyrrole active layer. In lab tests, the modified membrane showed higher water flux, better oil rejection, and far lower flux loss than a standard polypyrrole membrane when filtering simulated and real biologically treated oily wastewater. The design also resisted biofouling from bacteria and proteins, and continuous 16 hour runs showed minimal metal leaching. The work is still at the research stage, and the article does not report energy use per cubic meter or long-term pilot data. Those details will determine whether the membrane becomes a practical option for refineries and oil fields that need to reclaim water and meet tighter discharge limits.
