Selection and dominance mechanisms of denitrifying phosphate-accumulating organisms in biological phosphate removal process

Johwan Ahn, Tomotaka Daidou, Satoshi Tsuneda, Akira Hirata

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    Abstract

    A sequencing batch reactor under different electron acceptor conditions was operated serially to investigate the selection and dominance mechanisms of denitrifying phosphate-accumulating organisms (DNPAOs) in a biological nutrient removal process. The presence of a small amount of NO3 - at the start of the anaerobic phase stimulated the selection of DNPAOs in an anaerobic/aerobic system, and switching O2 to NO3 - as an electron acceptor enhanced the activity of anoxic phosphate uptake.

    Original languageEnglish
    Pages (from-to)2005-2008
    Number of pages4
    JournalBiotechnology Letters
    Volume23
    Issue number24
    DOIs
    Publication statusPublished - 2001

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    Keywords

    • Denitrifying phosphate-accumulating organisms
    • Electron acceptor
    • Enhanced biological phosphate removal
    • Fluorescent in situ hybridization

    ASJC Scopus subject areas

    • Biotechnology
    • Applied Microbiology and Biotechnology
    • Microbiology
    • Bioengineering

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