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Nitrification-denitrification in waste stabilisation ponds: a mechanism for permanent nitrogen removal in maturation ponds.

Camargo Valero, MA, Read, LF, Mara, DD, Newton, RJ, Curtis, TP and Davenport, RJ (2010) Nitrification-denitrification in waste stabilisation ponds: a mechanism for permanent nitrogen removal in maturation ponds. Water Science and Technology, 61 (5). 1137 - 1146 . ISSN 0273-1223

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Abstract

A pilot-scale primary maturation pond was spiked with (15)N-labelled ammonia ((15)NH(4)Cl) and (15)N-labelled nitrite (Na(15)NO(2)), in order to improve current understanding of the dynamics of inorganic nitrogen transformations and removal in WSP systems. Stable isotope analysis of delta(15)N showed that nitrification could be considered as an intermediate step in WSP, which is masked by simultaneous denitrification, under conditions of low algal activity. Molecular microbiology analysis showed that denitrification can be considered a feasible mechanism for permanent nitrogen removal in WSP, which may be supported either by ammonia-oxidising bacteria (AOB) or by methanotrophs, in addition to nitrite-oxidising bacteria (NOB). However, the relative supremacy of the denitrification process over other nitrogen removal mechanisms (e.g., biological uptake) depends upon phytoplanktonic activity.

Item Type: Article
Copyright, Publisher and Additional Information: © IWA Publishing 2010. The definitive peer-reviewed and edited version of this article is published in Water Science and Technology, 61 (5) 1137 - 1146. 2010. http://dx.doi.org/10.2166/wst.2010.963 and is available at www.iwapublishing.com."
Keywords: Ammonia, Bacteria, Biomass, Eukaryota, Nitrites, Nitrogen, Nitrogen Isotopes, Phytoplankton, Seasons, Sewage, Temperature, Waste Disposal, Fluid, Water Microbiology, Water Pollutants, Chemical, Water Purification
Academic Units: The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) > Inst for Pathogen Control Engineering
Depositing User: Symplectic Publications
Date Deposited: 02 Nov 2011 16:57
Last Modified: 08 Feb 2013 17:34
Published Version: http://dx.doi.org/10.2166/wst.2010.963
Status: Published
Identification Number: 10.2166/wst.2010.963
URI: http://eprints.whiterose.ac.uk/id/eprint/42801

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