The rate of nitrate production during a two-stage nitrification batch reaction

Pratt, S., Gapes, D., Yuan, Z. and Keller, J. (2004). The rate of nitrate production during a two-stage nitrification batch reaction. In: S. J. Hall, C. Fux and J. Keller, Water, Science and Technology. Sequencing Batch Reactor Technology III : Selected Proceedings of the IWA International Specialised Conference on Sequencing Batch Reactor Technology. 3rd IWA Specialised Conference on Sequencing Batch Reactor Technology (SBR3), Noosa, Australia, (81-87). 22-26 February 2004.


Author Pratt, S.
Gapes, D.
Yuan, Z.
Keller, J.
Title of paper The rate of nitrate production during a two-stage nitrification batch reaction
Conference name 3rd IWA Specialised Conference on Sequencing Batch Reactor Technology (SBR3)
Conference location Noosa, Australia
Conference dates 22-26 February 2004
Proceedings title Water, Science and Technology. Sequencing Batch Reactor Technology III : Selected Proceedings of the IWA International Specialised Conference on Sequencing Batch Reactor Technology   Check publisher's open access policy
Journal name Water Science and Technology   Check publisher's open access policy
Place of Publication London, U.K.
Publisher IWA Publishing; Portland Press
Publication Year 2004
Sub-type Fully published paper
ISBN 1843394863
ISSN 0273-1223
Editor S. J. Hall
C. Fux
J. Keller
Volume 50
Issue 10
Start page 81
End page 87
Total pages 7
Language eng
Formatted Abstract/Summary
The two steps of nitrification, namely the oxidation of ammonia to nitrite and nitrite to nitrate, often need to be considered separately in process studies. It has been assumed that these two reactions can be described by single Monod models. In this paper, the suitability of the single Monod model for describing nitrite oxidation to nitrate is discussed. The measured rate of nitrate production during a batch reaction is presented. For the system studied it was found that nitrate production actually increased after the completion of ammonia oxidation. It is suggested that the reason for the increase was a combination of: (i) likely competition for oxygen when both substrates were present, and (ii) a decrease in ammonia inhibition of nitrite oxidisers with the removal of ammonia. The result is that a single Monod expression (based on nitrite as the substrate) could not be used to describe nitrate production. In these types of systems the consequence of oxygen limitation and substrate inhibition should also be considered.
© IWA Publishing 2004.
Subjects 279999 Biological Sciences not elsewhere classified
779999 Other
090410 Water Treatment Processes
0904 Chemical Engineering
Keyword Water resources
Batch reaction
Nitrate
Nitrite accumulation
Respirometry
Waste-water treatment
Off-gas analysis
Activated-sludge
Sensor
Parameters
Titration
Ammonia
Biofilm
Systems
Oxygen
Q-Index Code E1

 
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Created: Wed, 15 Aug 2007, 04:23:10 EST