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#36944 - 03/19/05 06:07 PM Re: NATURAL ways of purifing water.
Susan Offline
Geezer

Registered: 01/21/04
Posts: 5163
Loc: W. WA
I've heard of sand filters, but does anyone have the instructions for building one? It looks like it could be made from premade sewer or irrigation pipe. But details would be nice.

Sue

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#36945 - 03/19/05 08:48 PM Re: NATURAL ways of purifing water.
haertig Offline
Pooh-Bah

Registered: 03/13/05
Posts: 1911
Loc: Colorado
Those links on Sodis were quite interesting to follow. Seems so simple, just need to get the word out. Does anyone know if Sodis has been studied for elimination of Giardia and Cryptosporidium or other nasties common in the U.S. backcountry? If so, a redesign of hydration bladders so that they're more transparent might make the technique a worthwhile addition to a hiker's skillset. It looks like Sodis is more targeted to 3rd world countries and large scale disaster situations which might be dealing with different pathogens.

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#36946 - 03/19/05 11:17 PM Re: NATURAL ways of purifing water.
clearwater Offline
Old Hand

Registered: 03/19/05
Posts: 958
Loc: Channeled Scablands
It works on Crypto and giardia both, though if the water is at all cloudy
you have to let it settle or use a flocking agent such as alum first.

Straining through 2 layers of tightly woven cloth (sari cloth was used in
the tests) helps remove particulates and by itself remove the particles
that cholera sticks too. Another simple water purification step.

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#36947 - 03/20/05 03:07 AM Re: NATURAL ways of purifing water.
paramedicpete Offline
Pooh-Bah

Registered: 04/09/02
Posts: 1920
Loc: Frederick, Maryland

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#36948 - 03/20/05 03:33 AM Re: NATURAL ways of purifing water.
Milestand Offline
Member

Registered: 09/29/02
Posts: 124
Quote:
Previously posted by clearwater

Straining through 2 layers of tightly woven cloth (sari cloth was used in
the tests) helps remove particulates and by itself remove the particles
that cholera sticks too. Another simple water purification step.

Sari is folded 8 to 10 times in this example...

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#36949 - 03/20/05 09:06 AM Re: NATURAL ways of purifing water.
03lab Offline
dedicated member

Registered: 01/30/04
Posts: 121
Loc: berlin.de
Please use UBB Code or www.tinyurl.com when posting links. This thread has become unreadable for everyone that uses the forum in flat mode. Thanks.

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