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  5. Removal of ammoniacal-nitrogen from an artificial landfill leachate in downflow reed beds
 
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Removal of ammoniacal-nitrogen from an artificial landfill leachate in downflow reed beds

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Author(s)
Connolly, Roseanne 
Zhao, Y.Q. 
Sun, Guangzhi 
Allen, Stephen 
Uri
http://hdl.handle.net/10197/3198
Date Issued
29 October 2004
Date Available
30T14:19:16Z September 2011
Abstract
The fate of ammoniacal-nitrogen (NH4-N) was studied in a lab-scale downflow reed bed system treating an artificial landfill leachate. Individual reed beds were submerged by the leachate, then drained and rinsed by tap water. It was discovered that NH4-N was removed by a two-staged process, adsorption onto the reed bed media followed by nitrification into nitrite-nitrogen (NO2-N) and nitrate-nitrogen (NO3-N). A drop of NH4-N level of the leachate was observed when the reed beds were submerged. By rinsing of the beds, part of the NH4-N adsorbed inside the bed matrices was re-released into the rinse water. The presence of NO2-N and NO3-N in the rinse water demonstrated that nitrification process took place while the NH4-N was being retained inside the bed matrices. For artificial leachates with NH4-N levels of 150±5 mg/l, an average removal rate of 43.8% in a three-hour treatment was achieved; mass balance analysis indicated that processes of adsorption, and transformation into NO2-N and NO3-N accounted for 63.7%, 4.3% and 24.4% of the NH4-N removal, respectively. This study also demonstrated that in general greater recirculation rate of effluent around the downflow reed beds gives higher NH4-N removal.
Sponsorship
Other funder
Other Sponsorship
EPSRC
Type of Material
Journal Article
Publisher
Elsevier
Journal
Process Biochemistry
Volume
39
Issue
12
Start Page
1971
End Page
1976
Copyright (Published Version)
2003 Elsevier Ltd.
Keywords
  • Adsorption

  • Ammoniacal-nitrogen

  • Leachate

  • Nitrification

  • Reed bed

  • Wastewater treatment

Subject – LCSH
Ammonia--Absorption and adsorption
Leachate
Nitrification
Constructed wetlands
DOI
10.1016/j.procbio.2003.09.020
Web versions
http://dx.doi.org/10.1016/j.procbio.2003.09.020
Language
English
Status of Item
Peer reviewed
ISSN
0032-9592
This item is made available under a Creative Commons License
https://creativecommons.org/licenses/by-nc-sa/1.0/
Owning collection
Civil Engineering Research Collection
Scopus© citations
41
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Feb 4, 2023
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