Using the sun to sterilise water

January 28, 2007 at 10:43 pm Leave a comment

This link came from Sociolingo, and is a form of water purification I wasn’t familiar with. It is possible to sterilize drinking water by simply leaving it out in the sun. When containers of water are left on black roof shingles the heat and ultra-violet radiation destroys the bacteria that cause cholera, typhoid, dysentery and diarrhoea.

According to Pastor Moses Kwanga who is teaching villagers in Tanzania to use the process, “The technology is very easy, but up to now people have not been told about it. We can use old pieces of roofing to put the bottles on. It is also very cheap, so is accessible to everyone.” The most difficult part of the process has been to teach villagers about this form of water purification. Water expert David Makamba from Plan International says, “The big resistance from the community is cultural beliefs. People believe the water will be contaminated, or an enemy will put something bad in it, so we need to educate the people.”

With proper support this is a promising way to immediately insure a source of clean drinking water. The article “Sun and water: an overview of solar water treatment devices” from the Journal of Environmental Health gives more information on the process.


Entry filed under: Africa, solutions, sustainability, water.

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Save the World

Save the World in Three Easy Steps.

1. Learn. Read this blog to learn more about our global water crisis and how it impacts billions of people.

2. Make a Scarf. Follow our easy instructions to make a beautiful and unique scarf. Wear one to show your support for those in need, and sell a few to your family and friends.

3. Donate. Give the money you raised from your scarf to a worthy charity (See our list of Resources). Even a little bit will change the lives of those who have no access to clean water.

Repeat until everyone has access to safe, clean water.
January 2007
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