SODIS= SOlar water DISinfection. Ever see those ultraviolet water purifiers, they shine UV rays into the water and it kills all the little nasties in the water? SODIS uses the same process, but instead of an electric UV source you use good old free sunlight. Cleaned clear plastic water and soda bottles, up to 2 liter size are filled with suspect water and placed in the sun for several hours to disinfect them. Water with suspended particles will need to be filtered first, but rudimentary filters can be easily improvised.
|