Modelling and simulation revealing mechanisms likely responsible for achieving the nitrite pathway through aeration control

Guisasola, A., Marcelino, M., Lemaire, R., Baeza, J. A. and Yuan, Z. (2010) Modelling and simulation revealing mechanisms likely responsible for achieving the nitrite pathway through aeration control. Water Science and Technology, 61 6: 1459-1465. doi:10.2166/wst.2010.017


Author Guisasola, A.
Marcelino, M.
Lemaire, R.
Baeza, J. A.
Yuan, Z.
Title Modelling and simulation revealing mechanisms likely responsible for achieving the nitrite pathway through aeration control
Journal name Water Science and Technology   Check publisher's open access policy
ISSN 0273-1223
1996-9732
Publication date 2010-01-01
Year available 2010
Sub-type Article (original research)
DOI 10.2166/wst.2010.017
Open Access Status Not yet assessed
Volume 61
Issue 6
Start page 1459
End page 1465
Total pages 7
Place of publication London, United Kingdom
Publisher I W A Publishing
Language eng
Abstract Nitrogen removal via nitrite has recently gained a lot of interest because it results in significant savings in both aeration costs and COD (chemical oxygen demand) requirements for denitrification, when compared to the conventional biological nitrogen removal via nitrate. The effectiveness of two different control strategies to achieve the nitrite pathway in systems with sludge retention has been experimentally demonstrated: (i) control of aerobic phase length, with which aeration is terminated as soon as ammonia is completely oxidised; (ii) operation at low DO setpoints in the aerobic phase. These strategies have been extensively studied in nitrifying reactors and are currently applied in real systems achieving biological carbon, nitrogen and phosphorus removal. In this work, we aim to demonstrate, through modelling and simulation, that the competition between nitrite reducers and nitrite oxidisers for nitrite, rather than kinetic selection plays a major role in NOB washout. Moreover, the results show that the occurrence of simultaneous nitrification and denitrification under “aerobic” conditions is very helpful for the nitrite pathway obtainment and for a more efficient COD utilisation. © IWA Publishing 2010
Keyword Aeration
COD/N
Control
Modelling
Nitrite pathway
NOB
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID CTM2004-02569/TECNO
AP 2004-7085
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
Advanced Water Management Centre Publications
 
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Created: Sun, 18 Apr 2010, 10:00:23 EST