Effects of design and aeration control parameters on simultaneous nitrification and denitrification (SNdN) performance for activated sludge process

Insel G.

ENVIRONMENTAL ENGINEERING SCIENCE, vol.24, no.5, pp.675-686, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 5
  • Publication Date: 2007
  • Doi Number: 10.1089/ees.2006.0029
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.675-686
  • Keywords: simultaneous nitrification and denitrification, denitrification potential, oxygen half saturation constant, dissolved oxygen, set point control, PI control, COD/TKN ratio, NUTRIENT REMOVAL, DISSOLVED-OXYGEN, NITROGEN REMOVAL, MODEL
  • Istanbul Technical University Affiliated: Yes


In this study, a simulation-based process analysis was carried out for a simultaneous nitrification and denitrification (SNdN) process. The simulation results were found to be in agreement within 9% relative error compared to the effluent quality calculated with a proposed analytical design procedure. Based on the simulation study, an improved nitrogen removal efficiency around 96% was maintained for a dissolved oxygen set-point condition of K-OA >= S-Oset > K-O for the selected model. Under decreased chemical oxygen demand/total Kjeldahl nitrogen (COD/TKN) loading conditions, the adjustment of lower dissolved oxygen set point levels were required to achieve higher nitrogen removal performance.