Using the Sun to Sterilize Your Drinking Water.

Alex

Forget expensive chlorination - Tanzanian villagers used free sunlight to sterilize their water.

"I fill the plastic bottles, put the lids on, then put them on my black-painted roof where they stay for a whole day."

The sun heats the water, helped by the black roof, which helps to absorb the heat.

Solar radiation means a combination of ultra-violet rays and heat destroys the bacteria which cause common water-borne diseases like cholera, typhoid, dysentery and diahorrea.

After eight hours in the sun, it is ready to drink.

Link


Comments (4)

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Newest 4 Comments

Thanks for the link RadioRental - I think simple things like these will save lots of lives in the third world countries.

Another neat idea is solar refrigeration - for storing medicines and vaccines and so forth in remote areas with no electricity. Like this one: Link.
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Also reported in the BBC 3 years ago some research from the NSF on using sari cloth to filter cholera.
http://news.bbc.co.uk/2/hi/health/2640307.stm

he method reported above will only work if the water reaches +50C for one hour. Thus limiting this method geographically.
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no twitter posts please, its just more site to read everyday, but if you update both twitter and the site thats cool. twitter only contests sound good
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Nice interview, and I love the origin story of the name, Neatorama. The mention of guest bloggers who have come and gone made me think: "Alas, poor Yayo. I knew him well."
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if your Twitter feed is just the same as the site, I'll stick with the site. If there is something more on Twitter - comments, links that didn't quite make it, etc., I'll be all over it.
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I'm leaning toward Twitter-only content - it doesn't make much sense to me just to run the feed through Twitter, though that has been the way it was set-up before we got the account officially.

I think a combo of Twitter-only content and Neatorama exclusives/particularly good posts is the way to go.
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I think neatorama is best in its current format. I am always eager to look at the latest posts every day, or a few times a day. That said, I don't want to have to look in two places. Please don't post exclusives on twitter. I can see how a time dependent contest would be well served by twitter, but other than that, I don't see much of a point.

To be fair, I dislike twitter very much. I'm all for technological progress, being 22 and all, but there are various things about twitter that rub me the wrong way.
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Ahhh ya lost me on the Twit er.

It's a banal and ignorant place to be. More a flame game than the old yahoo chat rooms. Really alex, please reconsider. Twitter is for twats.
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