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Optimizing NOM Removal: Impact of Calcium Chloride

Department of Materials Science and Applied Mathematics, Faculty of Technology and Society, Malmö University, Nordenskiöldsgatan 1, 211 19 Malmö, Sweden
Vatteninfo Sverige AB, Kaserngatan 11, 761 46 Norrtälje, Sweden
Department of Building and Environmental Technology, Lund University, John Ericssons Väg 1, Box 118, 221 00 Lund, Sweden
Sweden Water Research AB, Ideon Science Park, Scheelevägen 15, 223 70 Lund, Sweden
TETRA Chemicals Europe AB, P.O. Box 901, 251 09 Helsingborg, Sweden
Authors to whom correspondence should be addressed.
Academic Editors: Juan Jose Galan and Ana R. Pasandín
Sustainability 2021, 13(11), 6338;
Received: 4 May 2021 / Revised: 31 May 2021 / Accepted: 31 May 2021 / Published: 3 June 2021
Understanding the character of natural organic matter (NOM) and assessing its impact on water quality is paramount for managers of catchments and water utilities. For drinking-water producers, NOM affects disinfectant demand and the formation of by-products which can have adverse health effects. NOM content in raw waters also has an impact on water treatment processes by increasing required coagulant dosages, reducing the effectiveness of adsorption processes and fouling membrane systems. This study investigated the effects of calcium chloride (CaCl2) as a co-coagulant in Al3+ and Fe3+ assisted coagulation, flocculation and sedimentation processes for NOM-removal from raw water collected from Lake Bolmen, in southern Sweden. Jar tests were conducted at Ringsjö Water Works (WW), a surface water treatment plant (WTP), to investigate the potential reduction in primary coagulants aluminum sulphate (Al2(SO4)3) and ferric chloride (FeCl3). This work shows that CaCl2 can, in certain situations, reduce the need for primary coagulants, which would reduce the environmental impact and costs associated with primary coagulant consumption. View Full-Text
Keywords: NOM; coagulation; flocculation; Lake Bolmen; aluminum sulphate; ferric chloride; calcium chloride; raw water NOM; coagulation; flocculation; Lake Bolmen; aluminum sulphate; ferric chloride; calcium chloride; raw water
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MDPI and ACS Style

Gonzalez-Perez, A.; Hägg, K.; Duteil, F. Optimizing NOM Removal: Impact of Calcium Chloride. Sustainability 2021, 13, 6338.

AMA Style

Gonzalez-Perez A, Hägg K, Duteil F. Optimizing NOM Removal: Impact of Calcium Chloride. Sustainability. 2021; 13(11):6338.

Chicago/Turabian Style

Gonzalez-Perez, Alfredo, Kristofer Hägg, and Fabrice Duteil. 2021. "Optimizing NOM Removal: Impact of Calcium Chloride" Sustainability 13, no. 11: 6338.

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