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Nitrogen removal during summer and winter in a primary facultative WSP pond: preliminary findings from 15N-labelled ammonium tracking techniques.

van der Linde, E.R.C., Mara, D.D. and Newton, R.J. (2009) Nitrogen removal during summer and winter in a primary facultative WSP pond: preliminary findings from 15N-labelled ammonium tracking techniques. In: 8th IWA Specialist Group Conference on Waste Stabilization Ponds, 26 - 29 April 2009, Belo Horizonte/MG Brazil. (Unpublished)

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Abstract

Nitrogen removal mechanisms and pathways within WSP have been the focus of much research over the last 30 years. Debates and theories postulated continue to refine our knowledge regarding the cycling and removal pathways for this important nutrient, but a succinct answer has yet to be provided for holistic nitrogen removal. In this study, two experimental runs using labelled 15N as a stable isotope tracking technique were conducted on a pilot-scale primary facultative WSP in the UK; one in the summer of 2006, and the other in the winter of 2007. An ammonium chloride (15NH4Cl) spike was prepared as the slug for each experimental run, which also contained rhodamine WT to act as a dye tracer enabling the hydraulic characteristics of the pond to be mapped. Initial results from the study are reported here, and findings are compared and contrasted. Preliminary findings reveal that a greater proportion of 15N is incorporated into the algal biomass by assimilation and subsequent release as soluble organic nitrogen in summer than in winter. 15N ammonium passes out of the system much sooner and in a much higher proportion in the winter than in summer.

Item Type: Conference or Workshop Item (Paper)
Keywords: 15N; nitrogen; primary facultative pond; removal; transformation
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: Ms Caroline Wilson
Date Deposited: 22 May 2009 16:22
Last Modified: 08 Feb 2013 17:06
Published Version: http://www.acquacon.com.br/ponds2009/en/download.p...
Status: Unpublished
URI: http://eprints.whiterose.ac.uk/id/eprint/8628

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