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| Deacidification systems / Aluminium removal |
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Water types containing excessive carbon dioxide must be deacidified. Depending on the hardness level, either physical deacidificaion, chemical deacidification or a combination of the two may be necessary. Physical deacidification usually occurs via irrigation or high-powered aeration, where the free carbon dioxide is driven from the water.
Chemical deacidification is preferred, especially in cases of very soft water. As the hardness of the water increases, its buffering capacity is improved. Buffering capacity refers to the stability of a water type when pH value changes are made by adding alkalines or acids.
Depending on the geological source, the aluminium content of very acidic water types may be raised above the acceptable limits.
Chemical deacidification is required for the removal of aluminium via a filter. An excellent method suitable for this is the so-called "Schrießheimer method" (patented), developed by Technologiezentrum Wasser.
Shown here is an example of a deacidification and aluminium removal system in a city in Upper Franconia.
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