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Hygienization of sludge through anaerobic digestion at 35, 55 and 60 ºC

Kjerstadius, Hamse LU ; la Cour Jansen, Jes LU ; De Vrieze, Jo ; Haghighatafshar, Salar LU orcid and Davidsson, Åsa LU orcid (2013) In Water Science and Technology 68(10). p.2234-2239
Abstract
Legislation in Sweden and the European Union concerning the use of sewage sludge in agriculture is under revision and future concentration limits for pathogens in treated sludge are likely to be expected. The aim of this study was to evaluate the hygienization of Salmonella, Escherichia coli, Enterococcus and Clostridium perfringens through continuous anaerobic digestion at 35, 55 or 60 ºC as well as to investigate process stability and methane production at 60 ºC. The results indicated that digestion at 55 or 60 ºC with a minimum exposure time of 2 h resulted in good reduction of Salmonella, E. coli and Enterococcus and that anaerobic digestion thus could be used to reach the concentration limits suggested for the EU, as well as in... (More)
Legislation in Sweden and the European Union concerning the use of sewage sludge in agriculture is under revision and future concentration limits for pathogens in treated sludge are likely to be expected. The aim of this study was to evaluate the hygienization of Salmonella, Escherichia coli, Enterococcus and Clostridium perfringens through continuous anaerobic digestion at 35, 55 or 60 ºC as well as to investigate process stability and methane production at 60 ºC. The results indicated that digestion at 55 or 60 ºC with a minimum exposure time of 2 h resulted in good reduction of Salmonella, E. coli and Enterococcus and that anaerobic digestion thus could be used to reach the concentration limits suggested for the EU, as well as in Sweden. Furthermore, stable continuous

anaerobic digestion of sludge was achieved at 60 ºC, however with 10% less methane production compared to digestion at 35 and 55 ºC. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
anaerobic digestion, Methanosaeta, Methanosarcina, pathogen removal, sludge hygienization
in
Water Science and Technology
volume
68
issue
10
pages
2234 - 2239
publisher
IWA Publishing
external identifiers
  • wos:000330122400018
  • scopus:84892489194
  • pmid:24292473
ISSN
0273-1223
DOI
10.2166/wst.2013.486
language
English
LU publication?
yes
additional info
PMID: 24292473
id
79e32841-1a61-425a-ac99-e533bedde9ee (old id 4221668)
date added to LUP
2016-04-01 15:03:47
date last changed
2023-11-13 15:59:26
@article{79e32841-1a61-425a-ac99-e533bedde9ee,
  abstract     = {{Legislation in Sweden and the European Union concerning the use of sewage sludge in agriculture is under revision and future concentration limits for pathogens in treated sludge are likely to be expected. The aim of this study was to evaluate the hygienization of Salmonella, Escherichia coli, Enterococcus and Clostridium perfringens through continuous anaerobic digestion at 35, 55 or 60 ºC as well as to investigate process stability and methane production at 60 ºC. The results indicated that digestion at 55 or 60 ºC with a minimum exposure time of 2 h resulted in good reduction of Salmonella, E. coli and Enterococcus and that anaerobic digestion thus could be used to reach the concentration limits suggested for the EU, as well as in Sweden. Furthermore, stable continuous<br/><br>
anaerobic digestion of sludge was achieved at 60 ºC, however with 10% less methane production compared to digestion at 35 and 55 ºC.}},
  author       = {{Kjerstadius, Hamse and la Cour Jansen, Jes and De Vrieze, Jo and Haghighatafshar, Salar and Davidsson, Åsa}},
  issn         = {{0273-1223}},
  keywords     = {{anaerobic digestion; Methanosaeta; Methanosarcina; pathogen removal; sludge hygienization}},
  language     = {{eng}},
  number       = {{10}},
  pages        = {{2234--2239}},
  publisher    = {{IWA Publishing}},
  series       = {{Water Science and Technology}},
  title        = {{Hygienization of sludge through anaerobic digestion at 35, 55 and 60 ºC}},
  url          = {{http://dx.doi.org/10.2166/wst.2013.486}},
  doi          = {{10.2166/wst.2013.486}},
  volume       = {{68}},
  year         = {{2013}},
}