Water treatment before use. Dissolved substances : Changes in calco-carbonic characteristics

Changes in calco-carbonic characteristics
Water treatment before use. Dissolved substances

Author : Pierre MOUCHET

Publication date: January 10, 2000 | Lire en français

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5. Changes in calco-carbonic characteristics

These are treatments that affect all or some of the following parameters: pH, TA, TAC, TH, TCa, TMg, free CO₂; the main ones are:

neutralization of aggressive CO₂ (to combat corrosion in distribution networks and certain circuits);
softening treatments (total or partial TH elimination) and/or decarbonation (TAC elimination);
remineralization of water whose TAC and/or TH levels are too low for the desired objective.

5.1 Neutralizing aggression

In some cases, when you don't want to increase the salinity of the water (particularly after decarbonation on carboxylic resin), this is achieved by physically removing the aggressive CO₂ in an open aeration system

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