A comparison of strategies to optimize inline coagulant dosing for ultrafiltration

R. E. Gissel*, D. Dominiak, W. van de Ven, Grundfos Holding A/S, Denmark

The aim of this study was to investigate different methods for determination of dosage in inline coagulation prior to ultrafiltration. The chosen methods were conventional jar test, photometric dispersion analyser (PDA), online water quality sensor and filtration performance. The chosen methods have all been used or suggested in previous work.

For the investigations, three artificial surface waters, AW1 to AW3, were used in order to secure comparability from method to method. Poly aluminum chloride was used as coagulant.

The results showed that dosages found from jar test, PDA and online water quality sensor all were higher than the dosage providing the filtration with the lowest fouling rate for AW1. This can partly be explained by...

Session: M2 - Ultrafiltration
Day: 12 October 2016
Time: 10:45 - 12:00 h

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