Study on the Hard Water Softening Treatment and Its Mechanism Based on the Solubility Product

Category: CleanWAS 2017
Author: Yonggang Zeng
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The paper was based on the knowledge of solubility product(Ksp) which is applied to softening treatment of hard water, and emphatically analyzed the mechanism of transforming permanent hard water into temporary hard water by using Ksp principle. Then the following conclusion were drawn: The transformation of the permanent hardness which belong to the same type is suitable for the conversion of CaSO4 to CaCO3 in hard water, and the transformation of different types of permanent hardness is suitable for the transformation of CaCl2, MgCl2 and MgSO4 in hard water. In this paper, the conversion efficiency of CaSO4 to CaCO3 was studied by experiments, and the amount of transformation was predicted by linear regression equation. In the prediction, the maximum absolute error was 0.67, the maximum relative error was 0.1%, the average absolute error was 0.073, and the average relative error was 0.028%. Therefore, the prediction accuracy is high and reliable.

Pages 17-19
Year 2017
Issue 1
Volume 1

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