Formation and characteristics of nitrifying biofilm on a membrane modified with positively-charged polymer chains

Kazuaki Hibiya, Satoshi Tsuneda*, Akira Hirata

*この研究の対応する著者

研究成果: Article査読

35 被引用数 (Scopus)

抄録

Nitrifying bacteria hardly adhered to the surface of supporting materials in a fluidized bed bioreactor containing only inorganic compounds. The adhesivity of nitrifying bacteria was compared, between an unmodified membrane and a membrane modified with diethylamino groups, using the grafting method. The result showed that the diethylamino-group-grafted membrane successfully increased the adhesivity of nitrifying bacteria, which might be due to particular properties of the grafted membrane surface, such as positive charge and soft polymer chains. Moreover, the thickness of the biofilm exceeded 100 μm after incubation for 150 days in a continuously fed fluidized bed bioreactor. The results of fluorescence in situ hybridization (FISH) confirmed that the biofilm consisted mostly of ammonia-oxidizing bacteria. Moreover, the biofilm exhibited a much higher nitrification rate per unit area than other biofilms, which was confirmed by the analysis of the concentration profile of ammonium-nitrogen inside the biofilm using a microelectrode that we originally fabricated. Copyright (C) 2000 Elsevier Science B.V.

本文言語English
ページ(範囲)105-112
ページ数8
ジャーナルColloids and Surfaces B: Biointerfaces
18
2
DOI
出版ステータスPublished - 2000 8月

ASJC Scopus subject areas

  • バイオテクノロジー
  • 表面および界面
  • 物理化学および理論化学
  • コロイド化学および表面化学

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