Post-Treatment of Water

Recommendations for use of Chlorine and Acid in Edstrom Automated Watering Systems

Which Disinfectant does Edstrom Recommend and Why?

Edstrom recommends using chlorine to disinfect the watering system because it is safer and less expensive than other sanitizing agents.  Chlorine is an effective sanitizing agent because it is a strong oxidizer.  It is able to penetrate the bacteria cell and oxidize the proteins within the cell, resulting in the death of the bacteria.  

Post-Chlorination:

While chlorine must be removed from the inlet (feed) water before it enters the membranes, post-treatment water chlorination can be used to prevent bacteria growth in the storage tank. The permeate can be chlorinated up to 10 ppm. Avidity recommends chlorinating at a level of 2 to 3 ppm. Chlorination is accomplished with a chlorine injection pump and a solution tank filled with diluted bleach. The chlorine injection pump automatically operates when water is flowing into the storage tank. Post chlorine is injected between the machine’s permeate water outlet and the storage tank inlet.

CHLORINE ACID
A biocide that acts as an oxidizing agent; kills bacteria. Prevents the growth of bacteria by creating a “hostile” living environment, bacterial growth inhibitor.  
Degrades polysaccharide substances that provide the web-like structure of biofilm. Does not kill bacteria
Aim for ph of 2 to 3 ppm Aim for ph of 2.6-3.0 ppm
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