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mugwump · 08-16-2009, 11:12

More on water filtration...

My old NGO friend who lives for months on end in absolute shit holes has recommended a new water filter to me. She is using these in Congo villages as a stop gap while they dig new wells for a clean water supply. They bring in 10 of the filter units and use the ubiquitous plastic buckets as the 'dirty' resevoir. The Point Zero Two version filters 30 liters per hour and requires no other treatment (the .02 micron filter catches all viruses so no hypochlorite is needed for post-filter treatment). It apparently uses technology originally developed for ambulatory renal dialysis units. A simple back wash of the filter restores maximal flow. The manufacturers claim they've put a million gallons through one. The web site has testing and accredidation info.

I've never used it, but if NGO-Barbie recommends it that has been good in the past. They don't use them 'on demand' as the site recommends -- they need to 'make' too much water to supply a village -- so they leave them running constantly. They pre-filter the water through gravel/sand/cotton cloth. The Point Zero Two filters are back-flushed twice daily. Seems a good test of the system. At $145 they are cheaper than most portable/backpacking units.

She also says that if she had to buy them (the Point Zero Two units she uses were donated) she would use the Point One filter as the flow rate is double and the cost less than half ($60). Those do not filter out all viruses but catch all bacteria, protozoa, cysts, etc. She says the locals are resistant to most viruses in their environment and the ones they aren't (Hep A) pass around the water supply anyway.

The site: http://www.sawyerpointonefilters.com...o-purifier.php

ETA: searching on this I found another site that says these guys were at the last SHOT. Anyone see this there?

08-16-2009, 11:12	#619
mugwump Area Commander Join Date: Nov 2005 Posts: 1,403	More on water filtration... My old NGO friend who lives for months on end in absolute shit holes has recommended a new water filter to me. She is using these in Congo villages as a stop gap while they dig new wells for a clean water supply. They bring in 10 of the filter units and use the ubiquitous plastic buckets as the 'dirty' resevoir. The Point Zero Two version filters 30 liters per hour and requires no other treatment (the .02 micron filter catches all viruses so no hypochlorite is needed for post-filter treatment). It apparently uses technology originally developed for ambulatory renal dialysis units. A simple back wash of the filter restores maximal flow. The manufacturers claim they've put a million gallons through one. The web site has testing and accredidation info. I've never used it, but if NGO-Barbie recommends it that has been good in the past. They don't use them 'on demand' as the site recommends -- they need to 'make' too much water to supply a village -- so they leave them running constantly. They pre-filter the water through gravel/sand/cotton cloth. The Point Zero Two filters are back-flushed twice daily. Seems a good test of the system. At $145 they are cheaper than most portable/backpacking units. She also says that if she had to buy them (the Point Zero Two units she uses were donated) she would use the Point One filter as the flow rate is double and the cost less than half ($60). Those do not filter out all viruses but catch all bacteria, protozoa, cysts, etc. She says the locals are resistant to most viruses in their environment and the ones they aren't (Hep A) pass around the water supply anyway. The site: http://www.sawyerpointonefilters.com...o-purifier.php ETA: searching on this I found another site that says these guys were at the last SHOT. Anyone see this there? __________________ mugwump “Klaatu barada nikto” Last edited by mugwump; 08-16-2009 at 11:24.
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