Efficient NH3-N recovery from municipal wastewaters via membrane hybrid systems: Nutrient-Energy-Water (NEW) nexus in circular economy

•NH4+-N present in MWD can be considered more problematic components compared to P.•Standalone membranes suffer from quality requirements for industrial applications.•Performance of independent membrane processes was enhanced with MHS configuration.•Sustainable MHSs serve circular economy in the case of Nutrient-Energy-Water nexus.•REI values showed UF-RO as superior process when CAPEX and OPEX were considered.