Across Europe, the transition to a circular economy remains one of the most important yet challenging sustainability priorities. While innovative circular solutions continue to emerge across industries, many struggle to progress beyond isolated pilot programs and demonstration projects. Moving from concept to large-scale implementation often requires more than technological innovation—it demands strong collaboration, market readiness, supportive policy frameworks, and meaningful citizen engagement. Addressing this challenge is the EU-funded TREASoURcE project, which has demonstrated how systemic, citizen-driven circular economy models can be developed, tested, and prepared for replication across multiple regions and sectors.
The TREASoURcE initiative was designed to bridge the gap between circular economy theory and practical, real-world application. By adopting a regional systems approach, the project focused on creating scalable solutions that combine technical feasibility, commercial relevance, and social acceptance. Its work centered on three major sectors—energy, materials, and bioeconomy—where circularity has the potential to significantly reduce waste, improve resource efficiency, and support long-term sustainability goals.
A defining feature of the project was its commitment to stakeholder-driven innovation. Rather than testing ideas in isolated laboratory environments, TREASoURcE prioritized real-world demonstration projects involving entire value chains. Producers, technology providers, processors, municipalities, public authorities, and end users were brought together to co-design and test circular solutions in operational settings. This practical approach enabled project partners to validate technical performance, understand market dynamics, and identify barriers that could limit broader adoption.
According to Jan Bakke, representing Østfold County Council, these demonstrations were central to the project’s success.
“Stakeholder and key value chain demonstrations were essential for translating TREASoURcE concepts into practice. They ensured that solutions were tested in real-life settings and developed collaboratively across sectors and regions, supporting both feasibility and scalability,” Bakke explained.
One of the project’s most promising focus areas involved extending the life cycle of electric vehicle batteries. As EV adoption grows rapidly across Europe, managing used batteries has become a pressing challenge. TREASoURcE addressed this by exploring “second-life” applications for retired EV batteries, repurposing them for stationary energy storage.
To demonstrate the concept, the project established three battery energy storage pilots in Finland and Norway. These battery systems were installed in public and commercial buildings, where they were used to support local energy management and reduce peak electricity demand. Known as “peak shaving,” this process helps facilities lower energy costs while improving grid efficiency.
The pilots proved that second-life battery systems can offer both environmental and economic benefits. However, they also revealed that successful implementation depends heavily on local conditions. Factors such as electricity pricing models, energy consumption patterns, and national regulatory frameworks all significantly influenced performance. These findings reinforced an important lesson: circular economy solutions must be adapted to regional realities rather than applied through one-size-fits-all models.
Another major area of work focused on one of Europe’s most persistent environmental challenges—plastic waste. Traditional mechanical recycling methods often struggle to process mixed or contaminated plastic streams, leaving large volumes of material unrecovered. TREASoURcE explored how combining conventional and advanced recycling technologies could help close this gap.
The project demonstrated how mechanical and chemical recycling can operate as complementary systems rather than competing solutions. Particular attention was given to difficult-to-recycle plastics that are often discarded or incinerated. Through chemical recycling techniques—including catalytic pyrolysis followed by catalytic hydrotreatment—mixed plastic waste was converted into valuable chemical feedstocks suitable for industrial reuse.
This process significantly reduced impurities and contaminants, highlighting the potential of advanced recycling technologies to address waste streams that conventional methods cannot manage effectively. The results support a broader systems-thinking approach, where multiple recycling pathways work together to maximize material recovery and minimize environmental impact.
A third key pillar of the project centered on the bioeconomy, particularly underutilized agricultural side streams and organic residues. Across Europe, large volumes of agricultural by-products remain underused or discarded despite their potential value as raw materials for food, feed, energy, and industrial applications.
To unlock this opportunity, TREASoURcE developed a digital marketplace designed to connect side-stream producers with processors, municipalities, and end users. This digital platform enabled better matching of supply and demand while supporting more efficient use of biological resources.
In addition, the project introduced models for local bioeconomy development and rural-urban symbiosis, encouraging stronger collaboration between rural producers and urban users. These frameworks created new opportunities for higher-value utilization of biological materials, helping reduce waste while strengthening regional economies and circular business ecosystems.
Beyond technical innovation, replication and transferability were core priorities from the very beginning of the project. Many sustainability initiatives fail because successful pilots cannot easily be replicated elsewhere. To avoid this, TREASoURcE embedded scalability into every stage of its design.
The project engaged stakeholders across Europe through workshops, webinars, expert panels, and direct exchanges with municipalities, businesses, and industry organizations. Special emphasis was placed on collaboration across the Baltic Sea region, where circular economy cooperation is increasingly viewed as a regional strategic priority.
Lessons learned from these efforts were compiled into a publicly available Replication Handbook, offering practical guidance for policymakers, companies, and regional authorities seeking to implement similar solutions in their own communities.
Looking ahead, project leaders believe the groundwork has now been laid for broader deployment.
“We see the next steps focusing on embedding these solutions directly into operational practices of cities, regions, companies, and service providers,” said Ugur Kaya of VTT Technical Research Centre of Finland. “There is a growing interest from municipalities and businesses seeking practical circular economy solutions, which creates a strong foundation for deployment and scaling beyond the project’s lifetime.”
As the project concludes, its long-term legacy lies not only in its technical demonstrations but also in the practical tools and collaborative models it leaves behind. Digital platforms, circular procurement frameworks, tested partnership models, and citizen engagement strategies now provide a blueprint for future deployment.
Most importantly, TREASoURcE has shown that successful circular economy transformation depends on people as much as technology. Through participatory pilots, co-creation processes, and behavior-change initiatives, citizens were positioned as active contributors rather than passive beneficiaries.
In doing so, the project offers a compelling example of how Europe can move beyond isolated sustainability experiments toward a more integrated, scalable, and citizen-centered circular economy—one capable of delivering lasting environmental, economic, and social value across regions and industries.
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