The Download: recycling clothing, and fish-friendly hydropower
The news: Less than 1% of clothing is recycled. Most of the rest ends up dumped in a landfill or burned. A team of researchers hopes to change that with a new process that breaks down mixed-fiber clothing into reusable, recyclable parts without any sorting or separation in advance.
How they did it: Many garments are made of a mix of natural and synthetic fibers. Once these fibers are combined, they are difficult to separate. To tackle this problem, the team used a solvent that breaks the chemical bonds in polyester fabric while leaving cotton and nylon intact. To speed up the process, they power it with microwave energy and add a zinc oxide catalyst.
Why it matters: While similar methods have been used to recycle pre-sorted plastic, this is the first time they’ve been used to recycle mixed-fiber textiles without any sorting required. Read the full story.
—Sarah Ward
What new hydropower tech says about climate action
Back at MIT Technology Review’s ClimateTech event in 2022, Gia Schneider, a cofounder of Natel Energy, spoke about her company’s mission to design hydropower turbines that are safer for fish.
To illustrate her point, she shared grisly images of fish that had been hit by conventional turbine blades. On the other hand, the fish swimming through Natel’s turbines seemed relatively unbothered, curving around the blades and going on their merry way downstream.
Recently, our climate reporter Casey Crownhart had a chat with Schneider about how Natel is working to change hydropower technology and juggle climate action with freshwater ecosystems to make hydropower a bit more fish-friendly. Read the full story.
This story is from The Spark, our weekly newsletter covering innovations in climate and energy tech. Sign up to receive it in your inbox every Wednesday.
