Titrimetric monitoring of a completely autotrophic nitrogen removal process

Fully autotrophic nitrogen removal processes, such as the combined SHARON-Anammox process, help to improve the sustainability of wastewater treatment. Successful operation of such a completely autotrophic system is, among others, based on the strict control of the SHARON reactor in order to produce...

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Bibliographic Details
Published in:Water science and technology 2006-01, Vol.53 (4-5), p.533-540
Main Authors: Van Hulle, S W H, Zaher, U, Schelstraete, G, Vanrolleghem, P A
Format: Article
Language:English
Subjects:
Ammonium
Ammonium compounds
Automation
Bioreactors
Colorimetry
Dilution
High frequency
Influents
Measurement
Measurement techniques
Measuring instruments
Monitoring
Nitrates - analysis
Nitrites - analysis
Nitrogen - isolation & purification
Nitrogen removal
On-line systems
Phosphates
Phosphates - analysis
Quaternary Ammonium Compounds - analysis
Reactors
Removal
Sustainability
Titration
Titrimetry
Waste Disposal, Fluid
Wastewater
Wastewater treatment
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Summary:Fully autotrophic nitrogen removal processes, such as the combined SHARON-Anammox process, help to improve the sustainability of wastewater treatment. Successful operation of such a completely autotrophic system is, among others, based on the strict control of the SHARON reactor in order to produce an Anammox-suited influent with a 1:1 ammonium:nitrite ratio. The high quality and high frequency measurements provided by a titrimetric set-up measuring the total ammonium (TAN) and total nitrite (TNO2) concentrations facilitate this control considerably. In this study, the use of a titrimetric set-up for monitoring the combined SHARON-Anammox process is investigated. The technique that interprets on-line collected titration curves was applied to a lab-scale system. Comparison with classic colorimetric results gave statistically indistinguishable results for TAN and TNO2 concentrations in the SHARON reactor. In the Anammox reactor, only TAN could be determined by the investigated method due to the very low TNO2 concentrations. Phosphate, a potential inhibitor of the Anammox process, is available as an additional measurement in the effluent of the SHARON reactor. Three measurements are thus combined in one single instrument. The proposed measuring technique holds different advantages over the other TAN and TNO2 measurement techniques such as on-site availability, easy automation, the absence of the need for high dilutions and cost reduction.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2006.157