www.theguardian.com/environment/2022/aug/05/incred…

"Katwijk is the site for the world’s first river “bubble barrier” – an experimental concept where a 120-metre stream of rising bubbles, plus the water current, pushes plastic waste to one side in order to be collected.

“We place a perforated tube...www.theguardian.com/environment/2022/aug/05/incred…

"Katwijk is the site for the world’s first river “bubble barrier” – an experimental concept where a 120-metre stream of rising bubbles, plus the water current, pushes plastic waste to one side in order to be collected.

“We place a perforated tube on the bottom of the waterway, at an angle, and then pump through compressed air: the rising air bubbles create an upward current that will lift plastic from the water column to the surface, and then at the surface – together with the flow of the river – it is all pushed to one side,” explains Philip Ehrhorn, the chief technology officer at the Dutch startup The Great Bubble Barrier. “Here, we get the flow from the pumping station, or the wind can also push trash into the catchment system.” Show more