Modelling approach to an ultrafiltration process for the removal of dissolved and colloidal substances from treated wastewater for reuse in recycled paper manufacturing

•UF for the removal of DCS from a secondary clarifier effluent from a WWTP in a papermaking factory.•Permeate flux decline and fouling resistances were studied.•Pore blocking model was examined using the coefficient of determination R2.•Permeate flux predictions by intermediate blocking model achieves the best predictions.•Deviation between the resistance in series model and the experimental flux data.