Editor-in-Chief Elisabeth Lisican showcases a handful of features to read in the April 2017 issue of Water & Wastes Digest.
Resin certified for organics removal from potable water and food applications
Dow Water Solutions has announced that its DOWEX TAN-1 anion resins have been tested and certified by NSF Intl. under NSF/ANSI Standard 61.
NSF/ANSI 61 - Drinking Water System Components is a nationally recognized health effects standard for all devices, components and materials that contact drinking water to ensure that these products do not contribute contaminants or impurities to the water that could cause adverse health effects. The certification of DOWEX resins means it can now be used for the removal of organics from surface water sources being targeted for potable water.
“This certification is yet another example of Dow’s commitment to help deliver acceptable, safe, and high-quality drinking water,” said Antonio Pavese, global marketing manager, Dow Water Solutions. “NSF 61 certification supports our belief in a more effective solution to the binding and removal of larger organics while offering more efficient regeneration and rinse downs through an open-pore, macroporous, strong-base anion resin for organic removal.”
DOWEX TAN-1 is a macroporous strong base anion resin with an open pore structure, allowing for a more effective binding and removal of total organics, in conjunction with more efficient regeneration due to faster kinetics. The resin is well suited for use to bind and remove many larger organics like tannic acids or polyphenolics, which pass through simple ultrafiltration, sand filtration and other first-stage processing steps.
This is the same anion resin technology approved as compliant under FDA 21CFR173.25 Food Contacting Regulations for food contact, and can be applied to bind organics from process stream for flavor and color control.