Real-time control strategy for simultaneous nitrogen and phosphorus removal using aerobic granular sludge

N. Kishida, Satoshi Tsuneda, yutaka Sakakibara, J. H. Kim, R. Sudo

    研究成果: Article

    16 引用 (Scopus)

    抄録

    To achieve stable and simultaneous removal of nitrogen and phosphorus using aerobic granular sludge in a sequencing batch reactor, a real-time control strategy was established, where time derivatives of electric conductivity (EC) and pH were monitored to facilitate the determinations of ends of phosphate release, nitrification and denitrification as well as corresponding optimum time-lengths of anaerobic, oxic, and anoxic phases in treatment cycles. Although biomass concentration in a reactor drastically fluctuated at the startup period because of very short sludge settling time for the formation of aerobic granular sludge, cycle length for proper treatment was automatically adjusted in this control system. Even when characteristics of influent wastewater markedly fluctuated, stable nitrogen and phosphorus removal was successfully attained both before and at pseudo-steady-state. Effluent concentrations of NH 4-N, NOx-N and PO4-P were always lower than 0.3 mg/L. On the other hand, when time lengths of the anaerobic/oxic/anoxic phases were fixed, stable nitrogen and phosphorus removal was not accomplished. Therefore, it is clear that the designed control system is very effective to obtain stable treatment performance in simultaneous nitrogen and phosphorus removal by aerobic granular sludge.

    元の言語English
    ページ(範囲)445-450
    ページ数6
    ジャーナルWater Science and Technology
    58
    発行部数2
    DOI
    出版物ステータスPublished - 2008

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    Real time control
    Phosphorus
    sludge
    phosphorus
    Nitrogen
    nitrogen
    control system
    Control systems
    Nitrification
    Denitrification
    Batch reactors
    nitrification
    denitrification
    Effluents
    Phosphates
    Biomass
    Wastewater
    conductivity
    phosphate
    effluent

    ASJC Scopus subject areas

    • Environmental Engineering
    • Water Science and Technology

    これを引用

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    AU - Tsuneda, Satoshi

    AU - Sakakibara, yutaka

    AU - Kim, J. H.

    AU - Sudo, R.

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    KW - Nitrogen removal

    KW - PH

    KW - Phosphorus removal

    KW - Real-time control

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