![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg0gc7ONE4D22fa3ve5DWFqUeqEJOu5G9rNCEZild1EKAIyYSu86w0zMDYfuUcvPNDcgNVWKRwMbtryPMT3PQU9hHfDvGcOt3U0vqGsQ4c3OmoPP27zzjWz5UidrTC86IPhn9E_NOVX9PPK/s320/Solvatten.jpg)
The Solvatten combines heat, UV and built-in filter in a specially designed container to clean contaminated water by filtrating macro-organisms which cause diseases.
"Similar to a standard jerrycan, the Solvatten can hold 10 liters of water, divided into two 5 liter compartments, each with a clear face. When you open the device and place it in the sun, exposing the two chambers to sunlight. This heats the water to 50-60°C, killing any pathogens which are present in a few hours. An indicator signals when the water is safe to drink (it changes from red to green). The whole process takes 3-4 hours in sunny conditions and 5-6 hours if it is cloudy."
Here, inventor Petra Wadström provides a thorough demonstration of the Solvatten device. Otherwise you may prefer a quick intro.
Solvatten means sun and water. This video reportage was made on the cleantech innovation in Nepal.
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