SODIS Solar Water Desinfection Method
It sounds too good to be true, simply fill plastic bottles with water and UV-A rays kill all viruses, bacteria and parasites, known as SODIS (Solar Water Disinfection method). Problem is that it cann’t be checked if the water is really clean. Students of the University of Washington now developed the PotaVida, an electronic sensor that can determine if the water is clean or not.
Bron: Springwise
Website: Potavida