ReNutriWater

ReNutriWater aimed to advance sustainable water management across the Baltic Sea Region by demonstrating how treated wastewater and its valuable nutrients can be safely and economically reclaimed and reused.

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About the project

Title: ReNutriWater – Closing local water circuits by recirculation of nutrients and water and using them in nature
Project duration: 1/2023–12/2025
Lead organisation: Chamber of Economy Polish Waterworks
Partners: 14 project partners from five countries: Poland, Finland, Latvia, Lithuania, and Denmark
The role of Centrum Balticum in the project: Centrum Balticum was responsible for the project communications.
Total budget: 3 847 234 €
Funding: European Regional Development Fund 3 077 787 €
Website: https://interreg-baltic.eu/project/renutriwater/

Project description:

ReNutriWater aimed to advance sustainable water management across the Baltic Sea Region by demonstrating how treated wastewater and its valuable nutrients can be safely and economically reclaimed and reused. By preserving nutrients in reclaimed water, the project sought to combat eutrophication of the Baltic Sea, reduce the need for artificial fertilisers, and support circular solutions for cities, municipalities, utilities, and other stakeholders.

Objectives:

ReNutriWater was structured around pilot activities in Poland, Finland, Latvia, Lithuania, and Denmark, reflecting varied geographical and operational contexts. These pilots explored methods for:

  • ensuring disinfected water is safe for reuse,
  • tailoring reclaimed water composition for specific applications,
  • and testing real world use cases, including irrigation and greenhouse cultivation.

Key actions and results:

The project delivered a portfolio of outputs designed to support practitioners, policymakers and utilities in implementing water reuse:

  • Handbook on Water Reuse –this comprehensive guide presents best practices from ReNutriWater pilot tests, risk assessment guidance, legal considerations, decision support via the WaterSafe IT Tool, and strategies for stakeholder engagement. It is aimed at municipalities, industries, researchers, and water professionals seeking practical knowledge on sustainable water reuse.
  • WaterSafe IT Tool – a digital decision support resource that helps stakeholders evaluate technologies and design safe, fit for purpose water reuse solutions.
  • Survey Analysis on Water Awareness – undertaken to assess and expand understanding of water reuse opportunities, barriers and stakeholder needs across the region.
  • Safe Water Mentoring Programme –this initiative connected participating organisations with experienced mentors to co-develop tailored action plans, strengthen technical capacity, and foster sustainable business models for water reuse.

ReNutriWater actively facilitated local and international knowledge exchange through workshops, events and presentations, contributing to broader discussions on water reuse and circular water economies.

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