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Current IssueApril 16, 2014
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Ask The Expert Question 2, July 2008
07/01/2008 
 
Question:

I am in Honduras, Central America. I need information on water treatment options for iron. I have a film of red color on the surface of a water well and the sanitary tank has turned red because of the water. We chlorinate the well but iron problems continue. We also add bensalconium chloride (alkyl dimethyl benzil ammonium chloride) in solution and use an aeration pump. I want to try to find a greensand type of filter or an ozone filter that will resolve this problem. Please let me know what is the best option.

Julio Diaz, Grupo Industrial DEQUIN

 

Answer: 

I can only recommend continuous chlorination/filtration.

Peter Cartwright, P.E., CWS-VI, Cartwright Consulting Co.

If this is indeed iron bacteria, continuous oxidation with post-filtration is the most logical choice and will help with ferrous iron also. The water should be tested for the following before attempting to specify treatment methodologies: hardness, iron, TDS, pH, total alkalinity, chlorine demand and ORP (at the very least).

Greg Reyneke, Intermountain Soft Water, Inc.

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