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Evaluation of Deammonification Process by Response Surface Models
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Water, Sewage and Waste technology.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Water, Sewage and Waste technology.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Water, Sewage and Waste technology.
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2011 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 215, no 1-4, 299-309 p.Article in journal (Refereed) Published
Abstract [en]

The influence of the operational variables on the Anammox process has been generally researched considering each variable separately. However, the optimization of the process also requires the identification of the more significant variables and their possible interactions. Response surface models were successfully applied to evaluate the performance of the Anammox process in a deammonification system (i.e., one-stage biofilm Anammox process) taking into account the combined effects caused by two sets of three variables. Specific Anammox activity was measured by a manometric method and used as the response variable. The obtained models pointed out that the significant variables were the temperature, the value of pH, and the ratio between the unionized species of the substrates (free ammonia and free nitrous acid (FA/FNA)). There were interactions among them caused by chemical equilibriums. Total nitrogen concentration and ammonium concentration were found to be not significant in the tested range. According to the models, the optimum values of temperature, pH, and free ammonia to free nitrous acid ratio within the test ranges were, respectively, 30A degrees C, 7.0, and 0.3. Further research at higher temperatures and lower values of pH and FA/FNA ratios would be necessary in order to find the absolute optimum conditions for the process. The obtained model can be also useful in order to develop control strategies that take into account the significant variables and their optimum ranges. A strategy to control deammonification reactors has been proposed, according to the results of the modeling.

Place, publisher, year, edition, pages
2011. Vol. 215, no 1-4, 299-309 p.
Keyword [en]
Anammox, Activity, Deammonification, Optimization, Response surface modeling
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-31298DOI: 10.1007/s11270-010-0479-9ISI: 000286195800025Scopus ID: 2-s2.0-78751585084OAI: oai:DiVA.org:kth-31298DiVA: diva2:405191
Note
QC 20110321Available from: 2011-03-21 Created: 2011-03-14 Last updated: 2017-12-11Bibliographically approved

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