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Impact of solid retention time and nitrification capacity on the ability of activated sludge to remove pharmaceuticals

Falås, Per LU ; Andersen, H. R.; Ledin, A. and la Cour Jansen, Jes LU (2012) In Environmental Technology 33(8). p.865-872
Abstract
Removal of five acidic pharmaceuticals (ibuprofen, ketoprofen, naproxen, diclofenac and clofibric acid) by activated sludge from five municipal activated sludge treatment processes, with various sludge ages and nitrification capacities, was assessed through batch experiments. The increase in aerobic sludge age from 1-3 to 7 d seemed to be critical for the removal of naproxen and ketoprofen, with markedly higher rates of removal at sludge ages of 7 d or more. No removal was shown for diclofenac and clofibric acid, whereas high rates were observed for ibuprofen in all investigated sludges. Parallel examinations of activated sludge batches with and without allylthiourea (12 mg/L), an inhibitor of ammonia monooxygenase, showed minor to... (More)
Removal of five acidic pharmaceuticals (ibuprofen, ketoprofen, naproxen, diclofenac and clofibric acid) by activated sludge from five municipal activated sludge treatment processes, with various sludge ages and nitrification capacities, was assessed through batch experiments. The increase in aerobic sludge age from 1-3 to 7 d seemed to be critical for the removal of naproxen and ketoprofen, with markedly higher rates of removal at sludge ages of 7 d or more. No removal was shown for diclofenac and clofibric acid, whereas high rates were observed for ibuprofen in all investigated sludges. Parallel examinations of activated sludge batches with and without allylthiourea (12 mg/L), an inhibitor of ammonia monooxygenase, showed minor to moderate influence on the removal rates of ketoprofen and naproxen. These results suggest that the removal rates of biodegradable pharmaceuticals in municipal activated sludge processes are strongly linked to the heterotrophic bacteria community. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
activated sludge, nitrification, solid retention time, pharmaceuticals
in
Environmental Technology
volume
33
issue
8
pages
865 - 872
publisher
Selper Ltd
external identifiers
  • wos:000303581600004
  • scopus:84860455153
ISSN
1479-487X
DOI
10.1080/09593330.2011.601764
language
English
LU publication?
yes
id
bffa1504-7aa8-4a79-8b8d-0f73773a6f45 (old id 2562859)
date added to LUP
2012-06-01 12:05:26
date last changed
2017-07-02 03:25:32
@article{bffa1504-7aa8-4a79-8b8d-0f73773a6f45,
  abstract     = {Removal of five acidic pharmaceuticals (ibuprofen, ketoprofen, naproxen, diclofenac and clofibric acid) by activated sludge from five municipal activated sludge treatment processes, with various sludge ages and nitrification capacities, was assessed through batch experiments. The increase in aerobic sludge age from 1-3 to 7 d seemed to be critical for the removal of naproxen and ketoprofen, with markedly higher rates of removal at sludge ages of 7 d or more. No removal was shown for diclofenac and clofibric acid, whereas high rates were observed for ibuprofen in all investigated sludges. Parallel examinations of activated sludge batches with and without allylthiourea (12 mg/L), an inhibitor of ammonia monooxygenase, showed minor to moderate influence on the removal rates of ketoprofen and naproxen. These results suggest that the removal rates of biodegradable pharmaceuticals in municipal activated sludge processes are strongly linked to the heterotrophic bacteria community.},
  author       = {Falås, Per and Andersen, H. R. and Ledin, A. and la Cour Jansen, Jes},
  issn         = {1479-487X},
  keyword      = {activated sludge,nitrification,solid retention time,pharmaceuticals},
  language     = {eng},
  number       = {8},
  pages        = {865--872},
  publisher    = {Selper Ltd},
  series       = {Environmental Technology},
  title        = {Impact of solid retention time and nitrification capacity on the ability of activated sludge to remove pharmaceuticals},
  url          = {http://dx.doi.org/10.1080/09593330.2011.601764},
  volume       = {33},
  year         = {2012},
}