watch a documentary about a low cost solution to improve bacteriological water quality at the household level, the solar disinfection, more know... Published on March 6, 2013 02:32 by Barkha Warade, Directorwatch a documentary about a low cost solution to improve bacteriological water quality at the household level, the solar disinfection, more known as SODIS method. http://www.sodis.ch/news/video/index_EN