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Ultrafiltration membranes in managed aquifer recharge systems

Hägg, K. LU orcid ; Persson, T. ; Söderman, O. and Persson, K. M. LU (2020) In Water Science and Technology: Water Supply 20(4). p.1534-1545
Abstract

The natural organic matter (NOM) and color content of surface waters are increasingly becoming an issue for artificial groundwater recharge plants. Water from Lake Bolmen, in southern Sweden, had in 2017 an annual average NOM and color content of 8.6 mg/L total organic carbon (TOC) and 57 mg Pt/L respectively, and values ranging from 7.8 to 9.6 mg/L TOC and 50-70 mg Pt/L. Since water from Lake Bolmen will be used at Vomb Water Works, an artificial groundwater recharge plant, the high NOM-content of Lake Bolmen must be reduced prior to aquifer recharge. From experiences of full-scale operations of chemical flocculation, lamella sedimentation and rapid sand filtration using ferric chloride, three different pre-treatment methods were... (More)

The natural organic matter (NOM) and color content of surface waters are increasingly becoming an issue for artificial groundwater recharge plants. Water from Lake Bolmen, in southern Sweden, had in 2017 an annual average NOM and color content of 8.6 mg/L total organic carbon (TOC) and 57 mg Pt/L respectively, and values ranging from 7.8 to 9.6 mg/L TOC and 50-70 mg Pt/L. Since water from Lake Bolmen will be used at Vomb Water Works, an artificial groundwater recharge plant, the high NOM-content of Lake Bolmen must be reduced prior to aquifer recharge. From experiences of full-scale operations of chemical flocculation, lamella sedimentation and rapid sand filtration using ferric chloride, three different pre-treatment methods were proposed; conventional precipitation, stand-alone direct precipitation before ultrafiltration (UF), and conventional precipitation with ultrafiltration after lamella sedimentation. In this study, a hollow fiber membrane (MWCO of 150 kDa) was used in different configurations during a 15 months pilot trial. The results showed the possibility to reduce NOM equal to conventional precipitation when a stable net-flux of 40 and 70 L/(m2·h) was used for direct precipitation before UF and conventional precipitation with UF, respectively. This paper presents these treatment methods and evaluates their viability as full-scale treatment steps.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coagulation, Flocculation, Natural organic matter (NOM), Pre-treatment, Ultrafiltration
in
Water Science and Technology: Water Supply
volume
20
issue
4
pages
12 pages
publisher
IWA Publishing
external identifiers
  • scopus:85090093696
ISSN
1606-9749
DOI
10.2166/ws.2020.082
language
English
LU publication?
yes
id
14260cdd-0a44-4f1b-b549-e1d51f062827
date added to LUP
2020-09-24 13:53:23
date last changed
2022-04-19 00:49:54
@article{14260cdd-0a44-4f1b-b549-e1d51f062827,
  abstract     = {{<p>The natural organic matter (NOM) and color content of surface waters are increasingly becoming an issue for artificial groundwater recharge plants. Water from Lake Bolmen, in southern Sweden, had in 2017 an annual average NOM and color content of 8.6 mg/L total organic carbon (TOC) and 57 mg Pt/L respectively, and values ranging from 7.8 to 9.6 mg/L TOC and 50-70 mg Pt/L. Since water from Lake Bolmen will be used at Vomb Water Works, an artificial groundwater recharge plant, the high NOM-content of Lake Bolmen must be reduced prior to aquifer recharge. From experiences of full-scale operations of chemical flocculation, lamella sedimentation and rapid sand filtration using ferric chloride, three different pre-treatment methods were proposed; conventional precipitation, stand-alone direct precipitation before ultrafiltration (UF), and conventional precipitation with ultrafiltration after lamella sedimentation. In this study, a hollow fiber membrane (MWCO of 150 kDa) was used in different configurations during a 15 months pilot trial. The results showed the possibility to reduce NOM equal to conventional precipitation when a stable net-flux of 40 and 70 L/(m2·h) was used for direct precipitation before UF and conventional precipitation with UF, respectively. This paper presents these treatment methods and evaluates their viability as full-scale treatment steps. </p>}},
  author       = {{Hägg, K. and Persson, T. and Söderman, O. and Persson, K. M.}},
  issn         = {{1606-9749}},
  keywords     = {{Coagulation; Flocculation; Natural organic matter (NOM); Pre-treatment; Ultrafiltration}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{4}},
  pages        = {{1534--1545}},
  publisher    = {{IWA Publishing}},
  series       = {{Water Science and Technology: Water Supply}},
  title        = {{Ultrafiltration membranes in managed aquifer recharge systems}},
  url          = {{http://dx.doi.org/10.2166/ws.2020.082}},
  doi          = {{10.2166/ws.2020.082}},
  volume       = {{20}},
  year         = {{2020}},
}