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This report describes the release of three baseline SWAT (Soil and Water Assessment Tool) model applications for river basins in Finland, Sweden, and Poland. These models, developed as part of the BONUS RETURN project, are hosted in the Finnish Environment Institute (SYKE) open data repository to allow researchers and practitioners to utilize existing parameterizations or develop new scenarios for these specific catchments.

This report provides a cost-benefit analysis (CBA) of selected eco-technologies for wastewater treatment and nutrient recovery across three catchment areas in the Baltic Sea Region (BSR). By combining CBA with multi-criteria analysis (MCA), the study evaluates the economic efficiency of various technologies compared to baseline scenarios, focusing on the recovery of phosphorus and nitrogen and the mitigation of greenhouse gas emissions.

This report details a multi-criteria analysis (MCA) conducted by the BONUS RETURN project to evaluate the sustainability of various eco-technologies for recovering nutrients and carbon from waste. The study focuses on three catchment areas: Vantaanjoki in Finland, Fyrisån in Sweden, and Słupia in Poland. By engaging local stakeholders to weight sustainability criteria, the report compares baseline management systems against alternatives such as anaerobic digestion, pyrolysis, and source-separation of wastewater.