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Non-Tech : U S FILTER (USF) A Water Stock !
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To: C.Carlos who wrote (23)5/27/1997 7:25:00 PM
From: Andrew Spurlin   of 361
 
That all depends on volume and type of treatment.
For very small applications they use Ion Exchange only which is referred to SDI or Service Dionization. For larger applications you would use several processes like RO (revese osmosis) and then EDI or CDI which would bring the purity of the water above 10 megaohm and then follow it with Ion Exchange to reach ultrapure levels of 18.3 meg.

A SDI bottle holds on average 3.5 cubic feet of resin which cost
between 100 and 150 (leased) and yield's about 800 gallons of 15-18 meg water with 1000 tds feed. The amount of product water would vary depending on the Feed water to the bottle which is why on the larger systems they use RO and EDI/CDI as pretreatment.

For a system to supply 5 gpm the most affordable as far as capital
expense would be to lease Ion Exchange bottles from a local vendor.

US Filter has offices in every large city. You could also try Culligan.

Hope this helps,
Andrew
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