Simple prediction of oxygen penetration depth in biofilms for wastewater treatment

Kazuaki Hibiya, Jun Nagai, Satoshi Tsuneda*, Akira Hirata

*この研究の対応する著者

研究成果: Article査読

42 被引用数 (Scopus)

抄録

The distribution of oxygen in a biofilm is very important in oxidation processes such as simultaneous carbon oxidization and nitrification using a fluidized bed biofilm reactor. In this study, attention was paid to biofilm thickness and biofilm density which significantly affect the oxygen distribution in biofilms. Using an oxygen microelectrode that we fabricated, the oxygen distribution in biofilms of different thicknesses was measured, and subsequently oxygen penetration depth and ratio were determined. As a result, oxygen penetration ratio decreased gradually with increasing biofilm thickness. Moreover, the kinetic parameters of a Monod-type reaction and the effective diffusion coefficient were computed based on the oxygen distribution in the biofilms. Using the obtained biofilm dry density, kinetic parameters and effective diffusion coefficient, the oxygen distribution in biofilms was successfully fitted to the results of a microelectrode analysis. The oxygen distribution was simulated by the finite difference method using the kinetic parameters and effective diffusion coefficient. Therefore, oxygen penetration ratio can be predicted at various biofilm thicknesses and oxygen concentrations in a bulk solution.

本文言語English
ページ(範囲)61-68
ページ数8
ジャーナルBiochemical Engineering Journal
19
1
DOI
出版ステータスPublished - 2004 7 1

ASJC Scopus subject areas

  • バイオテクノロジー
  • 環境工学
  • バイオエンジニアリング
  • 生体医工学

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