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MBR and GAC filtration followed by UV disinfection – implications for wastewater reuse at full scale

Takman, Maria LU ; Paul, Catherine J. LU orcid ; Davidsson, Åsa LU orcid ; Jinbäck, Moa ; Blomqvist, Stefan and Cimbritz, Michael LU (2024) In Water Reuse 14(2). p.226-226
Abstract

Influences of upstream wastewater treatment on the process combination of granular activated carbon (GAC) and ultraviolet (UV) disinfection were studied and the implications of this for wastewater reuse were assessed. GAC is an efficient chemical barrier but contributes little to the removal of indicator bacteria, and generally increases total bacteria concentrations, necessitating disinfection with UV radiation, for example, to ensure the safe reuse of wastewater. The efficiency of UV disinfection is impacted by factors such as particle concentration and UV absor-bance of the water and is thus affected by upstream treatment processes. A full-scale wastewater treatment plant with a membrane bioreactor (MBR) followed by GAC filtration... (More)

Influences of upstream wastewater treatment on the process combination of granular activated carbon (GAC) and ultraviolet (UV) disinfection were studied and the implications of this for wastewater reuse were assessed. GAC is an efficient chemical barrier but contributes little to the removal of indicator bacteria, and generally increases total bacteria concentrations, necessitating disinfection with UV radiation, for example, to ensure the safe reuse of wastewater. The efficiency of UV disinfection is impacted by factors such as particle concentration and UV absor-bance of the water and is thus affected by upstream treatment processes. A full-scale wastewater treatment plant with a membrane bioreactor (MBR) followed by GAC filtration was compared to a treatment plant with a conventional activated sludge process and sand filtration, followed by GAC filtration. The removal of indicator bacteria was higher by the GAC filter that was preceded by an MBR. A UV fluence of 400 J/m2 was sufficient to reach irrigation water quality for both process combinations and to meet the criteria for microbial drinking water quality in the MBR þ GAC effluent. One sample was selected for chemical analysis, comprising approximately 100 parameters, demon-strating that the MBR þ GAC þ UV (400 J/m2) effluent met all drinking water criteria except for nitrate levels.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
bacteria, fungi, granular activated carbon, membrane bioreactor, water reclamation
in
Water Reuse
volume
14
issue
2
pages
1 pages
publisher
IWA Publishing
external identifiers
  • scopus:85203092293
ISSN
2709-6092
DOI
10.2166/wrd.2024.009
language
English
LU publication?
yes
id
c1e2fbb3-142e-485b-afc3-627d894ef97b
date added to LUP
2024-11-25 11:31:58
date last changed
2025-04-04 14:35:46
@article{c1e2fbb3-142e-485b-afc3-627d894ef97b,
  abstract     = {{<p>Influences of upstream wastewater treatment on the process combination of granular activated carbon (GAC) and ultraviolet (UV) disinfection were studied and the implications of this for wastewater reuse were assessed. GAC is an efficient chemical barrier but contributes little to the removal of indicator bacteria, and generally increases total bacteria concentrations, necessitating disinfection with UV radiation, for example, to ensure the safe reuse of wastewater. The efficiency of UV disinfection is impacted by factors such as particle concentration and UV absor-bance of the water and is thus affected by upstream treatment processes. A full-scale wastewater treatment plant with a membrane bioreactor (MBR) followed by GAC filtration was compared to a treatment plant with a conventional activated sludge process and sand filtration, followed by GAC filtration. The removal of indicator bacteria was higher by the GAC filter that was preceded by an MBR. A UV fluence of 400 J/m<sup>2</sup> was sufficient to reach irrigation water quality for both process combinations and to meet the criteria for microbial drinking water quality in the MBR þ GAC effluent. One sample was selected for chemical analysis, comprising approximately 100 parameters, demon-strating that the MBR þ GAC þ UV (400 J/m<sup>2</sup>) effluent met all drinking water criteria except for nitrate levels.</p>}},
  author       = {{Takman, Maria and Paul, Catherine J. and Davidsson, Åsa and Jinbäck, Moa and Blomqvist, Stefan and Cimbritz, Michael}},
  issn         = {{2709-6092}},
  keywords     = {{bacteria; fungi; granular activated carbon; membrane bioreactor; water reclamation}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{226--226}},
  publisher    = {{IWA Publishing}},
  series       = {{Water Reuse}},
  title        = {{MBR and GAC filtration followed by UV disinfection – implications for wastewater reuse at full scale}},
  url          = {{http://dx.doi.org/10.2166/wrd.2024.009}},
  doi          = {{10.2166/wrd.2024.009}},
  volume       = {{14}},
  year         = {{2024}},
}