Marine plastic pollution is one of the most visible environmental problems of the 21st century. However, its origin is often inland, in streets, drains, and urban stormwater systems.
Frenchman Stéphane David, founder of Clean-Up Rivers, developed an accessible and effective technology that intercepts waste at its source before it reaches rivers, beaches, or oceans.
Prevention instead of cleanup: a necessary change of focus
Up to 80% of plastic waste is captured before reaching bodies of water.
The system consists of capture units installed at stormwater outlets, which retain solid waste without obstructing the water flow.
Its design allows for automatic release if the pressure exceeds 8 kg/dm² during heavy rain, preventing floods. Maintenance is manual but simple, and much more cost-effective than cleaning riverbanks or beaches.
“Sweeping is useless if the tap remains open,” summarizes David, who started with citizen clean-ups in Canet-en-Roussillon.
Modular technology adaptable to each environment
Three combinable models according to the type of waste and urban design.
- UCD Filet: high-strength polyethylene net for containers, bags, and cans
- UCD Filtre: filter with recycled X-TEX fibers, capable of absorbing hydrocarbons
- UCD Caisson: capture box that allows quick collection from the top or side
These units can complement each other, creating tailored solutions for each municipality, with controlled costs and measurable results.
Stopping the flow at its source: an effective and replicable strategy
80% of marine waste comes from the continent, according to the UN.
Installing filters in sewers and stormwater systems allows for interrupting the waste route before it reaches the sea.
This solution aligns with European regulations such as the Plastic Strategy and the Water Framework Directive, contributing to the 2030 environmental objectives.
Citizen awareness and environmental education
Each installed unit makes the problem visible and promotes collective responsibility.
Seeing what is collected raises awareness of the waste we produce. Clean-Up Rivers is working on new developments, such as a grid for cigarette butts, one of the most common and polluting waste in urban areas.
Scaling, integrating, and replicating: the current challenge
Cities like Nantes, Lyon, and Marseille are already implementing this technology with citizen support.
These solutions represent replicable models that can scale rapidly and adapt to different urban contexts. Their massive implementation can:
- Reduce marine pollution at its source
- Optimize municipal resources
- Raise awareness among citizens
- Align local policies with global objectives
