Integration of titrimetric measurement, off-gas analysis and NOx - biosensors to investigate the complexity of denitrification processes

McMurray, S. H., Meyer, R. L., Zeng, R. J., Yuan, Z. and Keller, J. (2004). Integration of titrimetric measurement, off-gas analysis and NOx - biosensors to investigate the complexity of denitrification processes. In: G. Langergraber and R. Haberl, Water Science Technology. Automation in Water Quality Monitoring II: Selected Proceedings of the 2nd International Specialised Conference on Automation in Water Quality Monitoring. 2nd International IWA Conference on Automation in Water Quality Monitoring (AutMoNet 2004), Vienna, Austria, (135-141). 19-20 April 2004.


Author McMurray, S. H.
Meyer, R. L.
Zeng, R. J.
Yuan, Z.
Keller, J.
Title of paper Integration of titrimetric measurement, off-gas analysis and NOx - biosensors to investigate the complexity of denitrification processes
Formatted title
Integration of titrimetric measurement, off-gas analysis and NOx- biosensors to investigate the complexity of denitrification processes
Conference name 2nd International IWA Conference on Automation in Water Quality Monitoring (AutMoNet 2004)
Conference location Vienna, Austria
Conference dates 19-20 April 2004
Convener International Water Association
Proceedings title Water Science Technology. Automation in Water Quality Monitoring II: Selected Proceedings of the 2nd International Specialised Conference on Automation in Water Quality Monitoring   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
ISSN 0273-1223
Editor G. Langergraber
R. Haberl
Volume 50
Issue 11
Start page 135
End page 141
Total pages 7
Language eng
Formatted Abstract/Summary
The denitrification process, namely the reduction of nitrate (NO3-) to nitrogen gas (N2), often cannot be simply modelled as a single step process. For a more complete and comprehensive model the intermediates, particularly nitrite (NO2-) and nitrous oxide (N2O), need to be investigated. This paper demonstrates the integration of titrimetric measurements and off-gas analysis with on-line nitrite plus nitrate (NOx-) biosensors, highlighting the necessity of measuring process intermediates with high time-scale resolution to study and understand the kinetics of denitrification. Investigation of activated sludge from a full-scale treatment plant showed a significant accumulation of NO2-, which appeared to impact on the overall denitrification rate measured as NOX- reduction or N2 production. A different sludge obtained from a lab-scale bioreactor produced N2O instead of N2 as the end product of denitrification. The two examples both illustrate the complexity of denitrification and stress the need for the more versatile and detailed measurement procedures, as presented in this paper.
© IWA Publishing 2004.
Subjects C1
279999 Biological Sciences not elsewhere classified
779999 Other
090409 Wastewater Treatment Processes
090410 Water Treatment Processes
0904 Chemical Engineering
Keyword Environmental sciences
Water resources
Activated sludge
Biosensors
Denitrification
Intermediates
Off-gas analysis
On-line
Titrimetry
Waste-water treatment
Activated-sludge
Nitrification
Removal
Sensor
Environmental engineering
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 04:22:49 EST