- Researchers led by MIT and Shanghai Jiao Tong University have demonstrated solar-powered multi-stage membrane distillation.
- They claim it can significantly reduce the cost of water production.
“The configuration of the device allows water to circulate in swirling eddies, in a manner similar to the much larger ‘thermohaline’ circulation of the ocean,” the scientists said. “This circulation, combined with the sun’s heat, drives water to evaporate, leaving salt behind. The resulting water vapor can then be condensed and collected as pure, drinkable water. In the meantime, the leftover salt continues to circulate through and out of the device, rather than accumulating and clogging the system.”