The pre-existing policy environment in the Baltic Sea region, defined by national interests and implemented within sectoral silos, has historically constrained innovation and implementation of systemic measures to safeguard the fundamental bio-physical basis that sustains 60 million people and 10 nations forming this vibrant region; namely its waters, its land and its air. Existing measures tend to only address challenges within a single sector and/or locality, often leading the translocation of challenges elsewhere in the Baltic Sea Region or the emergence of new challenges in another sector.

This BONUS RETURN project will focus on eco-technologies that reconcile key conflicting challenges inhibiting sustainable development in urban and rural settings within the Baltic Sea Region whilst reducing nutrient enrichment and carbonization in water bodies.

Pilots in Sweden, Finland and Poland will be set up to test the most promising eco-technologies identified by the project. Envisaged project outputs include an evidence-based review of eco-technologies; innovative models comprising both nutrient and carbon cycling; sustainability assessments of selected eco-technologies; policy recommendations for promoting the eco-technologies; and market strategies for the most promising eco-technologies.

SEI is coordinating the project with the following partners:


Below is a list of selected outputs from the project.

  • Final Report: Results, Conclusions and Recommendations
  • Mission Blue: Exploring Circular Interventions in the Baltic Sea Region
  • Policy Briefs: Sweden, Finland and Poland
  • Decision Support Toolbox
  • Serious Game System
  • Free access to functioning SWAT application of the three river basins
  • Barriers and opportunities for a circular phosphorus economy
  • Cost Benefit Analysis of selected ecotechnologies
  • Systematic review report of ecotechnology effectiveness
  • Symbiosis in a circular economy: workshop report
  • State of the art report on economic models in the Baltic Sea Region
  • Report on policy instruments and governance structures in the Baltic Sea Region
  • Historical Review Report: circularity from concept to practice
  • List of Emerging Ecotechnologies
  • First Periodic Report
  • Systematic map report, database and interactive GIS
  • Shortlist of Ecotechnologies
  • Report from multi-criteria analysis with comparisons of case studies and ecotechnologies
  • Closing the loop on nutrient losses from agriculture and cities

The full list is available on the BONUS RETURN website.