Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Optimizing NOM removal : Impact of calcium chloride

Gonzalez-Perez, Alfredo LU ; Hägg, Kristofer LU orcid and Duteil, Fabrice (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.

(Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
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}},
}