High-rate nitrification using aerobic granular sludge

Satoshi Tsuneda, M. Ogiwara, Y. Ejiri, A. Hirata

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    The performance of nitrifying granules, which had been produced in an aerobic upflow fluidised bed (AUFB) reactor, was investigated in various types of ammonia-containing wastewaters. When pure oxygen was supplied to the AUFB reactor with a synthetic wastewater containing a high concentration of ammonia (500 g-N/m3), the ammonia removal rate reached 16.7 kg-N/m3/day with a sustained ammonia removal efficiency of more than 80%. The nitrifying granules possessing a high settling ability could be retained with a high density (approximately 10,000 g-MLSS/m3) in a continuous stirring tank reactor (CSTR) even under a short hydraulic retention time (44 min), which enabled a high-rate and stable nitrification for an inorganic wastewater containing low concentrations of ammonia (50 g-N/m3). Moreover, the nitrifying granules exhibited sufficient performance in the nitrification of real industrial wastewater containing high concentrations of ammonia (1,000-1,400g-N/ m3) and salinity (1.2-2.2%), which was discharged from metal-refinery processes. When the nitrifying granules were used in cooperation with activated sludge to treat domestic wastewater containing organic pollutants as well as ammonia, they fully contributed to nitrification even though a part of activated sludge adhered onto the granule surfaces to form biofilms. These results show the wide applicability of nitrifying granules to various cases in the nitrification step of wastewater treatment plants.

    Original languageEnglish
    Pages (from-to)147-154
    Number of pages8
    JournalWater Science and Technology
    Volume53
    Issue number3
    DOIs
    Publication statusPublished - 2006

    Fingerprint

    Nitrification
    nitrification
    Ammonia
    ammonia
    sludge
    Wastewater
    wastewater
    activated sludge
    Metal refineries
    Organic pollutants
    Biofilms
    rate
    organic pollutant
    Wastewater treatment
    biofilm
    Hydraulics
    hydraulics
    salinity
    oxygen
    Oxygen

    Keywords

    • Aerobic upflow fluidised bed (AUFB)
    • Continuous stirring tank reactor (CSTR)
    • High-rate nitrification
    • Inorganic wastewater
    • Metal-refinery wastewater
    • Nitrifying granule
    • Organic wastewater

    ASJC Scopus subject areas

    • Water Science and Technology

    Cite this

    High-rate nitrification using aerobic granular sludge. / Tsuneda, Satoshi; Ogiwara, M.; Ejiri, Y.; Hirata, A.

    In: Water Science and Technology, Vol. 53, No. 3, 2006, p. 147-154.

    Research output: Contribution to journalArticle

    Tsuneda, Satoshi ; Ogiwara, M. ; Ejiri, Y. ; Hirata, A. / High-rate nitrification using aerobic granular sludge. In: Water Science and Technology. 2006 ; Vol. 53, No. 3. pp. 147-154.
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