Tailoring of highly efficient nitrifying biofilms in fluidized bed for ammonia-rich industrial wastewater treatment

S. Tsuneda*, T. Miyoshi, Y. Aoi, A. Hirata

*この研究の対応する著者

研究成果査読

20 被引用数 (Scopus)

抄録

We proposed two tailoring methods for efficient nitrifying biofilms on particles which are expected to be used in fluidized bed in nitrogen removal processes for industrial wastewaters. The first method was examined with gradual reduction of the hydraulic retention time in continuous feeding reactor to form biofilm with high nitrification ability. As a result, nitrification rate was successfully improved mainly due to acclimation of nitrifying bacteria to higher loading. The second tailoring method for nitrifying biofilm started with the biofilm which had been previously constructed in synthetic domestic wastewater containing high concentration of NH4+-N as well as various biodegradable organic compounds. Stepwise reduction of C/N ratio in inlet wastewater was performed during one month simultaneously with observation of microbial population dynamics in the biofilm using fluorescent in situ hybridization (FISH) analysis. As a result, this acclimation process promoted occupation of the biofilm by ammonia-oxidizing bacteria and resulted in making suitable biofilm structure for nitrification of ammonia-rich industrial wastewater. Moreover, it is confirmed that this new tailoring method greatly shortened required time to obtain nitrifying biofilms.

本文言語English
ページ(範囲)357-362
ページ数6
ジャーナルWater Science and Technology
42
3-4
DOI
出版ステータスPublished - 2000
イベントWater Quality Management in Asia (Asian Waterqual'99) - Taipei, Taiwan
継続期間: 1999 10 181999 10 20

ASJC Scopus subject areas

  • 環境工学
  • 水の科学と技術

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