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 806 West Queen St

 Southington, CT 06489


 Contact Information:

 Phone: 860-621-3630

 Fax: 860-621-0067

 E-mail: info@desct.com




Water Treatment Systems: Color Removal Systems

Description: The class of water conditioners that use special Type I anion exchange resins to reduce undesirable color (normally caused by organic tannins from a water supply). A color removal system consists of a mineral tank which holds the anion exchange resin, a control valve mounted on the mineral tank, and a brine tank. An anion exchange color removal system is normally regenerated with sodium chloride.

Pretreatment Requirements: The raw water must be tested before the color removal system is installed. On water with hardness levels above three (3) grains per gallon (52 ppm), a cation water softener is necessary to reduce the hardness level. The softener must be installed ahead of the color removal system. If no softener is installed, calcium carbonate (CaCO3) will precipitate in the anion bed and foul it. The minimal testing program should include the following:

1. Sediment: Excessive turbidity (in excess of 1 NTU) may block the exchange sites and plug the resin bed causing extensive pressure drop. If sediment is present, prefiltration of the water should be considered.

2. Iron: A anion exchange system does not reduce ferrous iron in a water supply. A separate iron filter will be needed upstream as well.

4. Total Dissolved Solids (TDS): TDS levels above 500 ppm will interfere with the exchange sites on the resin beads and must be reduced.

5 11 Types of Water Treatment Systems