The Glade 4.0

Anyone heard of the SODIS method? http://www.sodis.ch/index_EN

Apparently, some people are claiming that if you put water in a plastic or glass bottle and set it out in the sun for 6 hours, its purified?
I've taken survival courses where we dug a pit and either urinated into it or poured dirty water into it, put a cup in the middle of the hole, covered it with plastic, and allowed the moisture to be filtered through the dirt/sand and then evaporated onto the plastic and into the cup as a way of purifying water if you can't boil it or don't have any tablets or other filtration device....

But setting water in a bottle in the sun for 6 hours? Wouldn't that case bacteria and stuff to multiply, not kill it?

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"Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own." Jesus of Nazareth

It *should*. You have to heat something up to a certain temp to kill bacteria. That's...odd.

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It feels like all the people who want limited government really just want government limited to Republicans.
---The Daily Show

It makes use of UV radiation, oxygen free radicals and hydrogen peroxides to deactivate the organisms. The organisms will return to virulence if left in a dark place.

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"Dress cops up as soldiers, give them military equipment, train them in military tactics, tell them they’re fighting a ‘war,’ and the consequences are predictable." —Radley Balko

I dunno, sounds dubious but eh.

On a different note, I am *seriously* considering using this as my avatar:


Its from their PDF
http://www.sodis.ch/methode/anwendung/a ... lyer_e.pdf

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Holy shitsnacks!

Such as your stomach?

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Holy shitsnacks!

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In time, this too shall pass.

UV disinfection is a very good method for treating drinking water. That's where the idea is coming from. It's what is used in Steri-pen water purifiers.

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This cold and dark tormented hell
Is all I`ll ever know
So when you get to heaven
May the devil be the judge

It's claims are pretty impressive. Giardia and Cryptosporidium?

How come I am just now hearing about this? And why am I having a hard time believing that it works? Wouldn't this count as a revolutionary kind of thing? I mean....just think of the effect this could have on 3rd world countries.

I'm skeptical.

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"Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own." Jesus of Nazareth

Why haven't you heard of it before? Probably because you don't work in the drinking water industry, or focus your attention on cheap solutions to problems of water and food in developing countries. (I'm not saying this to be critical, there's really no reason you should.)

Why haven't solar stoves made more of an impact in Sudan? I've heard of them, and how a Peace Corps student or something from MIT developed these things that cost about $10 a piece and save the women the hassle and danger of going farther and farther afield every day for firewood. But that was, what a couple of years ago? I'd expect every Sudanese housewife living in a Darfur refugee camp to have one by now. But, really, after the initial blip of attention, haven't heard a thing about it. If I look it up, I can see that the program has made a difference. But, you get the idea - we just don't have the attention span for this kind of thing, especially if it's cheap and effective, and no one really stands to gain (except for the people it's helping).

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This cold and dark tormented hell
Is all I`ll ever know
So when you get to heaven
May the devil be the judge

I just wanna point out how well-matched are Taskiss' sig and the article he quoted. WTG

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Go back to zero, take a pill, and get well ~ Lemmy Kilmister

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In time, this too shall pass.

LK -

UV radiation can kill cells at low temperatures - hence sunburn.

However, there are lots of organisms that have evolved mechanisms for resisting UV damage (otherwise, there would not be any bacteria on the surface of lakes and oceans longer than 6 hours).

I believe protozoa, in particular, will be harder to kill with this method.

Overall, it's not a good idea. First, there could be some resistance. Second, the amount of UV radiation changes drastically throughout the year, throughout the day, and by region. I think this method, as a blanket solution, will get a lot of people sick.

Well that plus the whole chemicals leaching into the water from the bottle:

http://trusted.md/blog/vreni_gurd/2007/ ... z0tsIxAQtP

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I hope this works for the people that need it, but I too am extremely skeptical.

Glass blocks most of UV.

Sort of.
Long waves pass through (350+nm) about 90% while shorter waves (300+ nm) are blocked about 90%.

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"Dress cops up as soldiers, give them military equipment, train them in military tactics, tell them they’re fighting a ‘war,’ and the consequences are predictable." —Radley Balko