Scale In Water Treatment Systems


When certain chemcial species exceed their solubility limit in water, they scale the environment in which they are in solution.

Common scales in water treatment systems are:

Calcium Carbonate

Calcium Sulfate

Barium Sulfate

Calcium Fluoride


Magnesium Silicate

Calcium Phosphate

Calcium Carbonate scaling potential is estimated through the LSI - Langlier Saturation Index

Factors that affect solubility of chemical species:

1. Temperature

2. pH

3. Presence of other chemical species (such as Ammonia, EDTA)


Developed by:

Rami E. Kremesti M.Sc.