-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 on Mon, Oct 08, 2001 at 06:15:02PM -0700, Steve Schear (schear@lvcm.com) wrote:
At 04:30 PM 10/8/2001 -0700, mmotyka@lsil.com wrote:
UV is actually a very good disinfectant. It works by damaging the DNA/RNA of bacteria and virii. There is evidence of some viruses being re-activated by sunlight. UV coupled with a primary disinfectant like Cl makes a pretty safe system. The 4ft GE Quartz UV bulbs are powerful. The water should be clear - turbid water attentuates the UV too much.
In very poor places where many children die of dehydration because of contaminated water and where there is little or no money for water systems, aid workers have taught the kids to put water into clear plastic drink bottles ( the kind our landfills are clogged with ) and leave it in the sun. It works quite well.
How are RO systems at removing microorganisms?
[From some consumer spec comparisons to a RO unit I use]
Types Of Drinking Water Appliances & Pollutants Removed
Pollutant Sediment Activated Reverse Distil- De-Ion- UV Filter Carbon Osmosis ation ization Sodium No No Yes Yes Yes No Arsenic No No Yes Yes Yes No Lead No No Yes Yes Yes No
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