This presentation investigates an integrated wastewater treatment strategy combining Algal-Bacterial Aerobic Granular Sludge (AB-AGS), Granular Activated Carbon Aerobic Granular Sludge (GAC-AGS), and TiO₂-based photocatalysis for simultaneous microplastic removal, resource recovery, and energy reduction in municipal wastewater treatment. Laboratory-scale experiments evaluated polyethylene (PE) microplastic removal using AB-AGS and GAC-AGS systems under different operational conditions. In parallel, TiO₂ photocatalysis under both UV and visible light was investigated as an advanced treatment step to enhance microplastic degradation and improve effluent quality. Beyond contaminant removal, the study explored sludge valorization through the recovery of polyhydroxybutyrate (PHB), creating an additional resource recovery pathway within a circular economy framework. To assess real-world applicability, the proposed treatment strategy was applied to the Peschiera Borromeo Wastewater Treatment Plant (Milan, Italy). A full-scale engineering assessment was performed, including process redesign, plant layout modifications, blower demand evaluation, and hydraulic considerations. The resulting impacts on energy consumption, greenhouse gas emissions, and operational costs were quantified through CO₂ reduction and CAPEX/OPEX analyses. The results demonstrate how integrated granular sludge technologies can simultaneously improve treatment performance, reduce energy requirements, recover valuable resources from biosolids, and support the transition toward more sustainable and climate-resilient wastewater treatment infrastructure.