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A comprehensive and global sensitivity analysis was conducted under a range of operating conditions. The relative importance of mass transfer resistance versus kinetic parameters was studied and found to depend on the operating regime as follows: Operating under the optimal loading ratio of 1.90 (gO2/m3/d)/(gN/m3/d), the system was influenced by mass transfer (10% impact on nitrogen removal) and performance was limited by AOB activity (75% impact on
nitrogen removal), while operating above, AnAOB activity was limiting (68% impact on nitrogen removal). The negative effect of oxygen mass transfer had an impact of 15% on nitrogen removal. Summarizing such quantitative analyses led to formulation of an optimal operation window, which serves a valuable tool for diagnosis of performance problems and identification of optimal solutions in nitritation/anammox applications.

Original languageEnglish
JournalBioresource Technology
Publication date2012
Volume123
Pages230-241
ISSN0960-8524
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 8

Keywords

  • Autotrophic nitrogen removal, Anammox, Granular sludge, Uncertainty and sensitivity analysis, Modeling
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