Inhibitors for CaCo3-scaling in reverse-osmosis plants - Influence of suspended matter on membrane clogging

K. Zimmer, W. Hater, Kurita Europe GmbH; J. Jaworski, N. Kruse, G. Braun*, Cologne University of Applied Science, Germany

A new membrane-based method was applied in order to investigate the performance of antiscalants to prevent calcium carbonate scale with and without the presence of suspended matter. For the antiscalant phosphonocarbonic acid (PCA) was chosen. Strontium carbonate (SrCO3) was selected as model substance for suspended matter, due to its low solubility in water and easy removability by acids.

The results prove that an inhibition of CaCO3 scale on reverse osmosis (RO) membranes is possible with PCA up to severe calcite scaling conditions.

Tests runs at constant test conditions with increasing concentration of SrCO3 particles in the feed water showed, that PCA can completely inhibit calcite formation up to 60 mg/L of suspended matter in the concentrate. At higher concentrations...

Session: M3 - Nanofiltration and Reverse Osmosis
Day: 12 October 2016
Time: 13:00 - 14:15 h

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