Enhancement of biofilm formation onto surface-modified hollow-fiber membranes and its application to a membrane-aerated biofilm reactor

A. Terada, T. Yamamoto, K. Hibiya, S. Tsuneda, A. Hirata

    Research output: Contribution to journalArticle

    Abstract

    Surface-modified hollow-fiber membranes were prepared by radiation-induced grafting of an epoxy-group-containing monomer, glycidylmethacrylate (GMA), onto a polyethylene-based fiber (PE-fiber). The epoxy ring of GMA was opened by introduction of diethylamine (DEA). The bacterial adhesivity to this material (DEA-fiber) was tested by immersion into a nitrifying bacterial suspension. The initial adhesion rates and the amount of attached bacteria of the DEA-fiber were 6-10-fold and 3-fold greater than those of the PE fiber, respectively. A membrane-aerated biofilm reactor (MABR) composed of DEA fibers was developed for partial nitrification with nitrite accumulation. Prior to the nitrification test, it was confirmed that the oxygen supply rate (OSR) was proportional to air pressure up to 100 kPa, allowing easy control of oxygen supply. Stable nitrite accumulation was observed in the partial nitrification test at a fixed oxygen supply throughout the operation period, indicating that oxygen was consumed only by ammonia oxidizers. Furthermore, it was demonstrated that oxygen utilization efficiency (OUE) in the ammonia oxidation process was nearly 100% after 300 h incubation.

    Original languageEnglish
    Pages (from-to)263-268
    Number of pages6
    JournalWater Science and Technology
    Volume49
    Issue number11-12
    Publication statusPublished - 2004

    Fingerprint

    Biofilms
    biofilm
    membrane
    Membranes
    Oxygen supply
    Nitrification
    Fibers
    oxygen
    nitrification
    nitrite
    Ammonia
    ammonia
    fold
    Oxygen
    adhesion
    atmospheric pressure
    reactor
    fibre
    Polyethylenes
    Bacteria

    Keywords

    • Membrane-aerated biofilm reactor (MABR)
    • Oxygen supply rate (OSR)
    • Oxygen utilization efficiency (OUE)
    • Partial nitrification
    • Radiation-induced graft polymerization (RIGP)

    ASJC Scopus subject areas

    • Water Science and Technology

    Cite this

    Enhancement of biofilm formation onto surface-modified hollow-fiber membranes and its application to a membrane-aerated biofilm reactor. / Terada, A.; Yamamoto, T.; Hibiya, K.; Tsuneda, S.; Hirata, A.

    In: Water Science and Technology, Vol. 49, No. 11-12, 2004, p. 263-268.

    Research output: Contribution to journalArticle

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