Dutch Bubble Curtain Catches 86% of River Plastic

Imagine stopping ocean plastic at its source with nothing but air bubbles rising from a riverbed.

That's exactly what The Great Bubble Barrier is doing in the Netherlands and Portugal right now. The company lays a perforated tube across river and canal beds, pumps air through it, and creates a rising curtain of bubbles that gently pushes floating trash toward collection points on the shore.

The system catches an impressive 86 percent of surface plastic, according to validation from universities and independent research institutes. That number stays consistent across installations, says Anne Marieke Eveleens, the company's chief business development officer.

Here's the clever part: the diagonal installation uses the river's natural current to do the heavy lifting. The bubbles don't block boats or fish, but they cover the full width and depth of the waterway.

The timing couldn't be more critical. Less than 10 percent of plastic gets recycled, and production is expected to triple by 2030. Most of that waste finds its way into rivers, which serve as highways carrying millions of tonnes of plastic to the ocean every year.

Beach cleanups and ocean collection efforts help, but they're fighting an uphill battle. The Great Bubble Barrier tackles the problem upstream, literally catching plastic before it reaches the sea.

Four bubble barriers currently operate in Amsterdam, Katwijk, Harlingen, and Vila do Conde in Portugal. More installations are being discussed across Europe and the United States.

The Ripple Effect

The company's impact extends far beyond collecting trash. Each barrier generates data about what's polluting local waterways, information that helps governments create better policies to prevent plastic waste in the first place.

Implementation requires coordination between governments, waste managers, and local communities. The company works with residents to identify the most common items caught in the barriers and find ways to reduce that waste locally.

Being named a finalist for Prince William's Earthshot Prize gave the technology global visibility. Now people worldwide recognize the bubble barrier concept, opening doors to international expansion.

The dream destination? Southeast Asia, home to some of the world's most polluted rivers. Getting there means building the same multi-stakeholder partnerships that made European installations successful.

Eveleens envisions bubble barriers at pollution hotspots in major cities worldwide, not just cleaning rivers but informing the policies that could eventually make them unnecessary.

Sometimes the best solutions are the simplest ones: just add air.