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Removal of pharmaceuticals in WWTP effluents by ozone and hydrogen peroxide

Hey, Gerly LU ; Vega, S. R.; Fick, J.; Tysklind, M.; Ledin, A.; la Cour Jansen, Jes LU and Andersen, H. R. (2014) In Water S.A. 40(1). p.165-173
Abstract
Ozonation to achieve removal of pharmaceuticals from wastewater effluents, with pH values in the upper and lower regions of the typical range for Swedish wastewater, was investigated. The main aim was to study the effects of varying pH values (6.0 and 8.0), and if small additions of H2O2 prior to ozone treatment could improve the removal and lower the reaction time. The effluents studied differed in their chemical characteristics, particularly in terms of alkalinity (65.3-427 mg center dot l(-1) HCO3-), COD (18.2-41.8 mg center dot l(-1)), DOC (6.9-12.5 mg center dot l(-1)), ammonium content (0.02-3.6 mg center dot l(-1)) and specific UV absorbance (1.78-2.76 l center dot mg(-1)center dot m(-1)). As expected, lower ozone decomposition... (More)
Ozonation to achieve removal of pharmaceuticals from wastewater effluents, with pH values in the upper and lower regions of the typical range for Swedish wastewater, was investigated. The main aim was to study the effects of varying pH values (6.0 and 8.0), and if small additions of H2O2 prior to ozone treatment could improve the removal and lower the reaction time. The effluents studied differed in their chemical characteristics, particularly in terms of alkalinity (65.3-427 mg center dot l(-1) HCO3-), COD (18.2-41.8 mg center dot l(-1)), DOC (6.9-12.5 mg center dot l(-1)), ammonium content (0.02-3.6 mg center dot l(-1)) and specific UV absorbance (1.78-2.76 l center dot mg(-1)center dot m(-1)). As expected, lower ozone decomposition rates were observed in the effluents at pH 6.0 compared to pH 8.0. When pH 8.0 effluents were ozonated, a higher degree of pharmaceutical removal occurred in the effluent with low specific UV absorbance. For pH 6.0 effluents, the removal of pharmaceuticals was most efficient in the effluent with the lowest organic content. The addition of H2O2 had no significant effect on the quantitative removal of pharmaceuticals but enhanced the ozone decomposition rate. Thus, H2O2 addition increased the reaction rate. In practice, this will mean that the reactor volume needed for the ozonation of wastewater effluents can be reduced. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ozone, pharmaceuticals, hydrogen peroxide, wastewater effluents
in
Water S.A.
volume
40
issue
1
pages
165 - 173
publisher
Water Research Commission
external identifiers
  • wos:000336089900019
  • scopus:84893910636
ISSN
1816-7950
DOI
10.4314/wsa.v40i1.20
language
English
LU publication?
yes
id
7ac4ece9-d27c-4a85-9912-7561ceadc80f (old id 4559688)
date added to LUP
2014-07-18 10:11:34
date last changed
2017-06-18 03:16:36
@article{7ac4ece9-d27c-4a85-9912-7561ceadc80f,
  abstract     = {Ozonation to achieve removal of pharmaceuticals from wastewater effluents, with pH values in the upper and lower regions of the typical range for Swedish wastewater, was investigated. The main aim was to study the effects of varying pH values (6.0 and 8.0), and if small additions of H2O2 prior to ozone treatment could improve the removal and lower the reaction time. The effluents studied differed in their chemical characteristics, particularly in terms of alkalinity (65.3-427 mg center dot l(-1) HCO3-), COD (18.2-41.8 mg center dot l(-1)), DOC (6.9-12.5 mg center dot l(-1)), ammonium content (0.02-3.6 mg center dot l(-1)) and specific UV absorbance (1.78-2.76 l center dot mg(-1)center dot m(-1)). As expected, lower ozone decomposition rates were observed in the effluents at pH 6.0 compared to pH 8.0. When pH 8.0 effluents were ozonated, a higher degree of pharmaceutical removal occurred in the effluent with low specific UV absorbance. For pH 6.0 effluents, the removal of pharmaceuticals was most efficient in the effluent with the lowest organic content. The addition of H2O2 had no significant effect on the quantitative removal of pharmaceuticals but enhanced the ozone decomposition rate. Thus, H2O2 addition increased the reaction rate. In practice, this will mean that the reactor volume needed for the ozonation of wastewater effluents can be reduced.},
  author       = {Hey, Gerly and Vega, S. R. and Fick, J. and Tysklind, M. and Ledin, A. and la Cour Jansen, Jes and Andersen, H. R.},
  issn         = {1816-7950},
  keyword      = {ozone,pharmaceuticals,hydrogen peroxide,wastewater effluents},
  language     = {eng},
  number       = {1},
  pages        = {165--173},
  publisher    = {Water Research Commission},
  series       = {Water S.A.},
  title        = {Removal of pharmaceuticals in WWTP effluents by ozone and hydrogen peroxide},
  url          = {http://dx.doi.org/10.4314/wsa.v40i1.20},
  volume       = {40},
  year         = {2014},
}