A calibration methodology and model-based systems analysis for SBRs removing nutrients under limited aeration conditions

Güçlü Insel*, Gürkan Sin, Dae Sung Lee, Ingmar Nopens, Peter A. Vanrolleghem

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

A methodology is proposed for the model calibration ofnutrient-removing laboratory-scale SBRs under limited aeration. Based on in-process measurements and influent wastewater characterization, the ASM2d model was modified by adding an organic nitrogen module incorporating a hydrolysis mechanism. After calibration, the simulation results showed that enhanced biological nutrient removal occurred during the fill period and under reduced aeration achieving so-called 'simultaneous nutrient removal'. A model-based systems analysis was performed in terms of the contributions of different processes to overall oxygen, nitrogen and phosphate utilization. In each phase, simultaneously occurring biological reactions were compared using the calibrated model. According to the calibrated model, 61% of all denitrified nitrate is denitrified during the mixing/filling phase. On the other hand, 17% of all denitrified nitrate is consumed by simultaneous nitrification-denitrification during the first aerobic period. The aerobic and anoxic P-removals were quantified as 73% and 12%, respectively.

Original languageEnglish
Pages (from-to)679-687
Number of pages9
JournalJournal of Chemical Technology and Biotechnology
Volume81
Issue number4
DOIs
Publication statusPublished - Apr 2006

Keywords

  • Activated sludge model
  • Calibration
  • Sequencing batch reactor
  • Simultaneous nutrient removal

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