Single-stage autotrophic nitrogen-removal process using a composite matrix immobilizing nitrifying and sulfur-denitrifying bacteria

Y. Aoi, Y. Shiramasa, E. Kakimoto, Satoshi Tsuneda, A. Hirata, T. Nagamune

    研究成果: Article

    11 引用 (Scopus)

    抄録

    We developed a novel single-stage autotrophic nitrogen-removal process comprised of two composite immobilized biomass layers-one of nitrifying bacteria and one of sulfur-denitrifying bacteria and elemental sulfur-in a Fe-Ni fibrous slag matrix. Nitrification and consumption of dissolved oxygen occurred in the outer part and sulfur denitrification in the anoxic inner part of the composite matrix, thus realizing autotrophic nitrogen removal in a single reactor. The complete conversion of ammonia into N2 in a single reactor was demonstrated in both batch-mode incubation and continuous-feed operation. The spatial profiles of the ammonia-oxidizing bacteria and denitrifying bacteria were evaluated by real-time PCR, targeting their functional genes, and stratification of these two types was observed in the matrix after several months of incubation. This process does not require any specific reactor type or conditions and thus has the potential to be applied to many different wastewater treatment processes due to its simplicity in both operation and construction.

    元の言語English
    ページ(範囲)124-130
    ページ数7
    ジャーナルApplied Microbiology and Biotechnology
    68
    発行部数1
    DOI
    出版物ステータスPublished - 2005 8

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    Nitrogen removal
    Sulfur
    Bacteria
    Nitrogen
    Composite materials
    Ammonia
    Nitrification
    Denitrification
    Dissolved oxygen
    Waste Water
    Oxygen Consumption
    Wastewater treatment
    Biomass
    Slags
    Real-Time Polymerase Chain Reaction
    Genes

    ASJC Scopus subject areas

    • Biotechnology
    • Microbiology
    • Bioengineering
    • Microbiology (medical)

    これを引用

    Single-stage autotrophic nitrogen-removal process using a composite matrix immobilizing nitrifying and sulfur-denitrifying bacteria. / Aoi, Y.; Shiramasa, Y.; Kakimoto, E.; Tsuneda, Satoshi; Hirata, A.; Nagamune, T.

    :: Applied Microbiology and Biotechnology, 巻 68, 番号 1, 08.2005, p. 124-130.

    研究成果: Article

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