Optimizing NOM removal : Impact of calcium chloride
(2021) In Sustainability (Switzerland) 13(11).- Abstract
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... (More)
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.
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- author
- Gonzalez-Perez, Alfredo LU ; Hägg, Kristofer LU and Duteil, Fabrice
- organization
- publishing date
- 2021-06-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aluminum sulphate, Calcium chloride, Coagulation, Ferric chloride, Flocculation, Lake bolmen, NOM, Raw water
- in
- Sustainability (Switzerland)
- volume
- 13
- issue
- 11
- article number
- 6338
- publisher
- MDPI AG
- external identifiers
-
- scopus:85107702078
- ISSN
- 2071-1050
- DOI
- 10.3390/su13116338
- language
- English
- LU publication?
- yes
- id
- 6b712cce-c995-485a-b31e-d8f539d5e37e
- date added to LUP
- 2021-06-29 09:30:19
- date last changed
- 2022-04-27 02:36:34
@article{6b712cce-c995-485a-b31e-d8f539d5e37e, abstract = {{<p>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 (CaCl<sub>2</sub>) as a co-coagulant in Al<sup>3+</sup> and Fe<sup>3+</sup> 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 (Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>) and ferric chloride (FeCl<sub>3</sub>). This work shows that CaCl<sub>2</sub> can, in certain situations, reduce the need for primary coagulants, which would reduce the environmental impact and costs associated with primary coagulant consumption.</p>}}, author = {{Gonzalez-Perez, Alfredo and Hägg, Kristofer and Duteil, Fabrice}}, issn = {{2071-1050}}, keywords = {{Aluminum sulphate; Calcium chloride; Coagulation; Ferric chloride; Flocculation; Lake bolmen; NOM; Raw water}}, language = {{eng}}, month = {{06}}, number = {{11}}, publisher = {{MDPI AG}}, series = {{Sustainability (Switzerland)}}, title = {{Optimizing NOM removal : Impact of calcium chloride}}, url = {{http://dx.doi.org/10.3390/su13116338}}, doi = {{10.3390/su13116338}}, volume = {{13}}, year = {{2021}}, }