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Comparison between ultrafiltration and nanofiltration hollow-fiber membranes for removal of natural organic matter : A pilot study

Lidén, A. LU and Persson, K. M. LU (2016) In Journal of Water Supply: Research and Technology - AQUA 65(1). p.43-53
Abstract

Increasing trends of natural organic matter (NOM) in surface water in Nordic countries may cause future problems for drinking water producers. Emerging membrane technology, such as ultrafiltration (UF) and nanofiltration (NF), has the potential to produce safe drinking water of good quality from sources with high organic concentrations. In the present pilot study, surface water from three sources was treated by direct filtration on a hollow fiber ultrafilter (HFUF) and/or a hollow fiber nanofilter (HFNF). UV-absorbance (UVA) and total organic carbon (TOC) showed a high percentage of NOM removal by HFUF/coagulation, with retentions of around 75% for UVA and 55% for the TOC. NOM removal was notably greater by HFNF; with 93% in UVA... (More)

Increasing trends of natural organic matter (NOM) in surface water in Nordic countries may cause future problems for drinking water producers. Emerging membrane technology, such as ultrafiltration (UF) and nanofiltration (NF), has the potential to produce safe drinking water of good quality from sources with high organic concentrations. In the present pilot study, surface water from three sources was treated by direct filtration on a hollow fiber ultrafilter (HFUF) and/or a hollow fiber nanofilter (HFNF). UV-absorbance (UVA) and total organic carbon (TOC) showed a high percentage of NOM removal by HFUF/coagulation, with retentions of around 75% for UVA and 55% for the TOC. NOM removal was notably greater by HFNF; with 93% in UVA retention and 88% in TOC retention. Regrettably, the water treated with HFNF retained 20-35% of the desired hardness. HFUF achieved retention comparable to traditional flocculation and sedimentation steps, while HFNF achieved even better removal of NOM. Importantly, results indicate that a membrane process with only an additional polishing step would result in decreased concentrations of NOM in the drinking water, even with higher organic loads in the raw water.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Drinking water, Nanofiltration, Natural organic matter, Ultrafiltration
in
Journal of Water Supply: Research and Technology - AQUA
volume
65
issue
1
pages
43 - 53
publisher
IWA Publishing
external identifiers
  • Scopus:84958721793
ISSN
0003-7214
DOI
10.2166/aqua.2015.065
language
English
LU publication?
yes
id
ecd679a8-90bd-4287-8a1e-c81911e0de55
date added to LUP
2016-06-23 10:31:02
date last changed
2016-10-13 05:10:40
@misc{ecd679a8-90bd-4287-8a1e-c81911e0de55,
  abstract     = {<p>Increasing trends of natural organic matter (NOM) in surface water in Nordic countries may cause future problems for drinking water producers. Emerging membrane technology, such as ultrafiltration (UF) and nanofiltration (NF), has the potential to produce safe drinking water of good quality from sources with high organic concentrations. In the present pilot study, surface water from three sources was treated by direct filtration on a hollow fiber ultrafilter (HFUF) and/or a hollow fiber nanofilter (HFNF). UV-absorbance (UVA) and total organic carbon (TOC) showed a high percentage of NOM removal by HFUF/coagulation, with retentions of around 75% for UVA and 55% for the TOC. NOM removal was notably greater by HFNF; with 93% in UVA retention and 88% in TOC retention. Regrettably, the water treated with HFNF retained 20-35% of the desired hardness. HFUF achieved retention comparable to traditional flocculation and sedimentation steps, while HFNF achieved even better removal of NOM. Importantly, results indicate that a membrane process with only an additional polishing step would result in decreased concentrations of NOM in the drinking water, even with higher organic loads in the raw water.</p>},
  author       = {Lidén, A. and Persson, K. M.},
  issn         = {0003-7214},
  keyword      = {Drinking water,Nanofiltration,Natural organic matter,Ultrafiltration},
  language     = {eng},
  month        = {02},
  number       = {1},
  pages        = {43--53},
  publisher    = {ARRAY(0x58e1570)},
  series       = {Journal of Water Supply: Research and Technology - AQUA},
  title        = {Comparison between ultrafiltration and nanofiltration hollow-fiber membranes for removal of natural organic matter : A pilot study},
  url          = {http://dx.doi.org/10.2166/aqua.2015.065},
  volume       = {65},
  year         = {2016},
}