Reduction of N2O emission from biological nitrogen removal processes by Alcaligenes faecalis augmentation

Ki Young Park, Sun Joo Kim, Jin Young Jung, Sang Hyup Lee

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10 Citations (Scopus)


Immobilized Alcaligenes faecalis gels were augmented into an intermittent aeration reactor treating wastewater to control the emissions of N2O gas. An increase in the hydraulic retention time (HRT) in response to an applied loading caused a significant increase in N2O production. Through A. faecalis augmentation, the N2O conversion per influent total nitrogen (T-N) was reduced to 50 % of that in a control reactor. Although dissolved oxygen (DO) affected the N2O emission in both the activated sludge and the A. faecalis-sagmented culture, the emission in the A. faecalis-augmented reactor at a low DO level was much lower than that in the control activated sludge reactor.

Original languageEnglish
Pages (from-to)508-511
Number of pages4
JournalJournal of Industrial and Engineering Chemistry
Issue number4
Publication statusPublished - 2007 Jul


  • Alcaligenes faecalis
  • Heterotrophic nitrifier
  • Nitrogen removal
  • Nitrous oxide
  • Wastewater treatment

ASJC Scopus subject areas

  • Chemical Engineering(all)


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