Ceramic membrane separation coupled with catalytic ozonation for tertiary treatment of dyestuff wastewater in a pilot-scale study

•Coupling catalytic ozonation with ceramic membrane separation was piloted.•Catalytic ozonation effectively mitigates membrane fouling.•COD, SS, E. coli and chromaticity color were effectively removed.•Effluent did not show genotoxicity risk to aquatic organism. An apparatus coupling catalytic ozonation with ceramic membrane separation was designed and piloted for the tertiary treatment of dyestuff wastewater from Anaerobic–Anoxic–Oxic effluent. The apparatus’s water treatment capacity was about 10t/d at the average permeate flux of 110L/(m2⋅h). After the treatment of the dyestuff wastewater, CODCr decreased from 100±20mg/L to