Evaluation of Alternatives to Domestic Ion Exchange Water Softeners | 08/14/12

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Evaluation of Alternatives to Domestic Ion Exchange Water Softeners

By Mara Wiest, Dr. Peter Fox, Dr. Lee Wontae, HDR, Tim Thomure, HDR
Arizona State Universtiy April 26, 2011

• Water Quality and reuse in the Southwest US
• Ion exchange water softening system process and effects on remediated water quality
• No-salt alternatives to ion exchange and the mechanisms by which they reduce scale formation
• Experimental procedure
• Results
• Future Work

Study Objective
Provide technical data to identify credible alternatives to ion exchange water softeners that would provide consumers with the ability to reduce the impacts of hard water without creating the negative salinity impacts.

No-Salt Alternatives to Ion Exchange

• Capacitive Deionization
• Electrically Induced Precipitation
• Template Assisted Crystallization
• Electromagnetic Water Treatment

• All alternative devices were effective at reducing scale.
• The most promising technology is the template assisted crystallization with scale reductions of over 90%.
• Further study is needed to look into the mechanisms at work for the magnetic treatment and a rapid testing protocol.

Lic. # M1527    Texas State Board of Plumbing Examiners PO Box 4200 Austin, TX 78765