Chemical Enhanced Backwashing for Controlling Organic Fouling in Drinking Water Treatment Using a Novel Hollow-Fiber Polyacrylonitrile Nanofiltration Membrane

A novel polyacrylonitrile (PAN)-based ultrafiltration (UF) hollow-fiber membrane was newly synthesized for nanofiltration (NF) applications. This semi-fully NF characterized using a variety of analysis techniques. The exhibited higher negative charge and hydrophilicity lower surface roughness compared to the pristine UF membrane. Experiments study performance fouling were simulated under laboratory conditions in cross-flow system in–out mode organic compounds, namely, humic acid sodium alginate. removal efficiencies alginate 65% 73%, respectively, 93% 95%, proposed flux decline by natural matter less case that To mitigate on membrane, hypochlorite (NaClO) used as chemical enhanced backwashing agent. At NaClO concentration 1 mg/L with time 30 s, an optimal recovery 92.1% initial permeability PAN-NF achieved degradation. results this will provide practical insight act technical guide NF-based plant engineers/operators.