D3.9 Review report summarising the outcome emerged from all the individual tasks of WP3

This deliverable consolidates the main findings, outcomes and recommendations emerging from all tasks of Work Package 3 (WP3) of the P2GreeN project. It brings together the results of research on circular business models and value chains, spatial planning, social and user acceptance, and legal and regulatory frameworks, highlighting key barriers and enabling conditions for implementing circular nutrient and water recovery solutions. By examining the interconnections between regulatory feasibility, economic viability, spatial integration and stakeholder acceptance, the report provides an integrated perspective on the transition from pilot demonstrations to wider deployment. It concludes with targeted recommendations to support the development of governance frameworks in pilot and follower regions and facilitate the upscaling and replication of P2GreeN solutions across Europe.