Nanofiltration of UHT flash cooler condensates from a dairy factory: Characterisation and water reuse potential

► Flash cooler condensates were characterised to evaluate their potential reuse. ► A 200 Da nanofiltration unit was used to reduce the pollutant load of wastewater. ► The influence of operating conditions on permeate flux and quality was studied. ► The volume concentration ratio was a limiting factor on the final design proposed. ► An economic estimation, based on costs and savings, was carried out.