Solvatten is Swedish for "sun water." The Swedes have come up with a device that uses solar technology to purify water. It's aptly named "Solvatten" and is being used right now mostly in third world countries to help clean water for drinking and hygienic purposes.
The faq that you download from the site spells out what can be done with the device. It takes approx. 3 to 5 hrs. for the water to heat up to the point it kills bacteria. If the water is for drinking then the device is put in the shade to cool. In 3 to 4 hours bacteria can be eliminated from turbid water. On a cloudy day, 5 to 6 hours.
They suggest it can be used twice a day and Solvatten lasts approx. 5 years.
They claim a special technological design that stirs up and filters the water. No bad taste and the materials are FDA approved. The technology can also be scaled up to meet the needs of public entities like schools, health clinics, as well as for tourism and disaster relief.
You can see how this would be useful in hurricanes and earthquakes. As it upgrades and is more widely distributed it would be great for disaster relief centers to have lots of these on hand.
From their faq:
* "How will SOLVATTEN reach the market?
SOLVATTEN is suitable for local water, hygiene and sanitation programs and will
initially be distributed through International Organizations. The aim is to find local
entrepreneurs and through them and maybe also by local production reach the local
market to gain acceptance for the new technology.
• What are the advantages with SOLVATTEN?
SOLVATTEN can be a water-purifying tool in vast areas around the world where you
do not have electricity but polluted water and a lot of sun!
You gain health advantages, save time (especially for women who are commonly
responsible for the water) and save the environment.
And at last, SOLVATTEN can hopefully inspire people to invent more uses for solar
energy in other areas."
Currently distribution is aimed at local organizations that help out in third world countries.
Check out the solar water purifying device here at Solvatten.
Here's a demo of how the device works Here.
The Solvatten FAQ is Here.