Removal of Membrane Fouling and Control of Halogenated By-Products by a Combined Cleaning Process with Peroxides and Sodium Hypochlorite

Sodium hypochlorite (NaClO) solution is wildly used to remove membrane fouling-derived organic materials and restore flux, which can result in the formation of halogenated by-products. To reduce by-products, a combined cleaning process with NaClO peroxides including hydrogen peroxide (H2O2), peroxydisulfate (PDS), peroxymonosulfate (PMS) were applied offline mode fouling. It was found that all processes could effectively flux. Compared followed by (NaClO–peroxide), fewer by-products generated post-combined (peroxide–NaClO), PDS–NaClO exhibited best performance controlling Overall, most by-product generation showed positive correlation reaction time temperature.