Fibrous support stabilizes nitrification performance of a membrane-aerated biofilm

The effect of liquid flow perturbation

Akihiko Terada, Junpei Ito, Shinya Matsumoto, Satoshi Tsuneda

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Nitrification stability and biofilm robustness were examined by comparing a fibrous support membrane-aerated biofilm reactor (FS-MABR), where a woven fibrous support was surrounded on a silicone tube, with an MABR. The overall mass transfer coefficient of oxygen for the FS-MABR, assuming no boundary layer between the fibrous material and bulk liquid, was 5.85 m/d at an air pressure of 27 kPa, which was comparable to that value of the MABR (5.54 m/d). The amount of biomass on the fibrous support with a silicone tube was 2.48 times larger than on the bare silicone. The biomass loss after a high liquid flow rate condition was 49% and 75% in the FS-MABR and MABR, exhibiting robust biofilms grown on the fibrous support. The FS-MABR provided more stable nitrification performance than the MABR irrespective of a high liquid flow rate. Both reactors have deteriorated ammonium (NH+ 4-N) removal without a high liquid flow rate condition to eliminate excessive biomass, indicating that regular maintenance is essential to eliminate excessive biofilm from a MABR for nitrification, which potentially acts as a NH4+ diffusion barrier.

    Original languageEnglish
    Pages (from-to)607-615
    Number of pages9
    JournalJournal of Chemical Engineering of Japan
    Volume42
    Issue number8
    DOIs
    Publication statusPublished - 2009 Aug 20

    Fingerprint

    Nitrification
    Biofilms
    Membranes
    Liquids
    Silicones
    Biomass
    Flow rate
    Diffusion barriers
    Ammonium Compounds
    Boundary layers
    Mass transfer
    Oxygen
    Air

    Keywords

    • Fibrous support
    • High liquid flow rate
    • Membrane-aerated biofilm reactor
    • Nitrification
    • Sloughing

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)

    Cite this

    Fibrous support stabilizes nitrification performance of a membrane-aerated biofilm : The effect of liquid flow perturbation. / Terada, Akihiko; Ito, Junpei; Matsumoto, Shinya; Tsuneda, Satoshi.

    In: Journal of Chemical Engineering of Japan, Vol. 42, No. 8, 20.08.2009, p. 607-615.

    Research output: Contribution to journalArticle

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