Complete autotrophic denitrification in a single reactor using nitritation and anammox gel carriers

Kazuichi Isaka, Yuya Kimura, Tomoko Yamamoto, Toshifumi Osaka, Satoshi Tsuneda

    Research output: Contribution to journalArticle

    23 Citations (Scopus)

    Abstract

    A novel aerobic denitrification reactor, aerobic denitrification using nitrifying and anoxic ammonium-oxidizing (anammox) bacteria immobilized on gel carriers in a single stage (AIGES), was developed. Two types of gel carriers, a nitritation gel carrier and an anammox gel carrier, were installed in single reactor, and the denitrification performance of simultaneous nitritation and anammox was evaluated. The denitrification performance increased gradually with increased aeration rate, reaching a denitrification rate of 1.4kgNm-3d-1 2weeks after the nitritation and anammox gel carriers were mixed. A high average denitrification efficiency of 82% was confirmed. Stable aerobic denitrification performance was observed for more than half a year. In the startup period of AIGES operation, ammonia-oxidizing bacteria were shown by fluorescence in situ hybridization analysis to grow on the surface layer of anammox gel cubes. These results indicated that anammox gel carriers promptly adapted to an aerobic environment by altering the microbial ecosystem.

    Original languageEnglish
    Pages (from-to)96-101
    Number of pages6
    JournalBioresource Technology
    Volume147
    DOIs
    Publication statusPublished - 2013 Nov

    Fingerprint

    Denitrification
    Ammonium Compounds
    denitrification
    ammonium
    Gels
    gel
    Bacteria
    bacterium
    reactor
    Ammonia
    Ecosystems
    aeration
    surface layer
    fluorescence
    ammonia
    Fluorescence
    ecosystem

    Keywords

    • Ammonium
    • Anammox
    • Denitrification
    • Immobilization
    • Nitrification

    ASJC Scopus subject areas

    • Bioengineering
    • Environmental Engineering
    • Waste Management and Disposal

    Cite this

    Complete autotrophic denitrification in a single reactor using nitritation and anammox gel carriers. / Isaka, Kazuichi; Kimura, Yuya; Yamamoto, Tomoko; Osaka, Toshifumi; Tsuneda, Satoshi.

    In: Bioresource Technology, Vol. 147, 11.2013, p. 96-101.

    Research output: Contribution to journalArticle

    Isaka, Kazuichi ; Kimura, Yuya ; Yamamoto, Tomoko ; Osaka, Toshifumi ; Tsuneda, Satoshi. / Complete autotrophic denitrification in a single reactor using nitritation and anammox gel carriers. In: Bioresource Technology. 2013 ; Vol. 147. pp. 96-101.
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