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)

    Abstract

    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
    Volume13
    Issue number4
    Publication statusPublished - 2007 Jul

    Keywords

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

    ASJC Scopus subject areas

    • General Chemical Engineering

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