UPSTREAM addresses the targets of the Mission by overcoming challenges related to the monitoring, prevention, elimination, and valorisation of litter (L), plastics (P), and microplastics (MP). Demonstrating a suite of 14 solutions addressing pollution at every step in the water system, connected to 7 rivers in 5 countries, will enable the co-creation of an extensive database of knowledge and sustainable business models with a focus on making information as widely accessible as possible. The involvement of wastewater treatment plant (WWTP) owners, industrial partners with existing supply chains, innovative SMEs, and a water cluster association will ensure exploitation of the project solutions, while €500k in cascade funding will enhance replication across Europe. The UPSTREAM consortium will thus establish circular value chains with the potential to decrease plastic litter by 50% and MP pollution by 30%. The advances in UPSTREAM are based on best-in-world innovations, including: • Standardised, rapid monitoring techniques able to detect MP down to sizes >25 μm • Bio-based, biodegradable plastics the stop the formation of MP in consumer products and WWTPs themselves • Elimination of more than 90% MP within WWTPs from both sludge and effluent streams • Innovative floating platforms capable of removing >83% of L, P, and MP directly from rivers at both the surface and riverbed, without creating noise pollution or harming ecosystems • Production of relevant monomers from recovered plastics through both advanced fractionation and depolymerisation and biotransformation UPSTREAM represents a pan-European consortium with 5 demo sites across Europe, including 4 WWTPs (UK, ES, DE, IT), plus a testing area on the Danube in Serbia. The consortium is strengthened by top European RTOs, the world leader in sustainable bioplastics development, Novamont, and completed by partners dedicated to creating a digital knowledge sharing platform and engaging with citizens and stakeholders.

The project is built around the three main pillars of monitoring plastic litter, its collection and valorisation and, of course, the prevention of the distribution of non-degradable plastics. We will do so by strongly building on former projects addressing these topics and by connecting to previously identified major initiatives active in this area. For us, the most promising aspect is the activation and necessary participation of citizens affected by plastic pollution directly on the shorelines. We will guide them to becoming plastic entrepreneurs with a deeply rooted knowledge base and the right tools to start their own businesses through the valorisation of collected plastic litter and the provision of zero-waste solutions to all actors. We plan to employ 4 breakthrough innovations per pillar (monitoring, collection, prevention) that are neatly interwoven, building upon each other to create an even better whole. We will test these solutions in 8 demonstration sites in 8 Mediterranean countries and after validation, scale them up in 33 more sites with the potential to be launched across the whole Mediterranean. In parallel we will run two open calls to third parties to attract more solutions for implementation following our same methodology. All-in-all, we plan to map out 170 km2 for plastic litter, reach circa 100,000 citizens, collect around 400 tons of plastic waste, and build up plastic prevention pathways through scaling and replication for an equivalent of 3,700 tons of plastic.