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Dynamic modelling of nitrification in an aerated facultative lagoon

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10.1016/j.watres.2007.07.034
 
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Houweling, Dwight
Kharoune, Lynda
Escalas Cañellas, AntoniMés informacióMés informacióMés informació
Comeau, Yves
Document typeArticle
Defense date2008-01
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Faced with the need to improve ammonia removal from lagoon wastewater treatment plants (WWTPs) operated in Quebec, Canada, mechanistic modelling has been proposed as a tool for explaining the seasonal nitrification phenomenon and to evaluate optimization and upgrade scenarios. A lagoon model that includes a modified activated sludge biokinetic model and that assumes completely mixed conditions in the water column and sediments has been applied to simulate 3 years of consecutive effluent data for a lagoon from the Drummondville WWTP. Successful prediction of results from this plant indicates that the seasonal nitrification is determined by temperature, dissolved oxygen (DO) concentrations, hydraulic retention time (HRT) of the water column and washout driven by a well-mixed water column. Results also indicate that sediments contribute to the ammonia load in the lagoon effluent, particularly in spring and early summer. Sensitivity analyses performed with the model indicate that the nitrification period could be prolonged by increasing DO concentrations in the lagoon and that bioaugmentation would be particularly effective in spring and early summer. Limitations of the model are discussed, as well as ways to improve the hydraulic model.
CitationHouweling, D. [et al.]. Dynamic modelling of nitrification in an aerated facultative lagoon. "Water research", Gener 2008, vol. 42, núm. 1-2, p. 424-432. 
URIhttp://hdl.handle.net/2117/11773
DOI10.1016/j.watres.2007.07.034
ISSN0043-1354
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