We’ll drink to that!
Researchers at the Massachusetts Institute of Technology and Georgia Tech have found a way to use recycled beer yeast to make water cleaner by removing lead, the schools announced.
The breakthrough builds on their 2021 research that a year’s worth of discarded beer from a sole brewery could treat Boston’s entire water supply.
A process called biosorption, where yeast can quickly suck in traces of lead along with other heavy metals from the water, was key to the project. Researchers packaged yeast inside special hydrogel capsules that created a de facto lead filter for water.
They’re easy to remove from water once it is drink-ready, scientists said.
“We have the hydrogel surrounding the free yeast that exists in the center, and this is porous enough to let water come in, interact with yeast as if they were freely moving in water, and then come out clean,” researcher Patricia Stathatou said of the study, now published in the journal “RSC Sustainability.”
“The fact that the yeast themselves are bio-based, benign and biodegradable is a significant advantage over traditional technologies.”
Next, the team is brewing up a concept to modify the faucet water in homes or for mass quantities at treatment plants.
“We think that there’s an interesting environmental justice aspect to this, especially when you start with something as low-cost and sustainable as yeast, which is essentially available anywhere,” researcher Devashish Gokhale said.
