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Quantitative evaluation of microbial food chain in wastewater treatment reactor

Research Project

Project/Area Number 16K14334
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Civil and environmental engineering
Research InstitutionNational Institute for Environmental Studies

Principal Investigator

Onodera Takashi  国立研究開発法人国立環境研究所, 地域環境研究センター, 主任研究員 (30583356)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords生物学的排水処理 / 活性汚泥 / 食物網 / 下水処理 / 炭素・窒素安定同位体比 / 活性汚泥法 / 食物連鎖
Outline of Final Research Achievements

Carbon and nitrogen stable isotope ratios (δ13C and δ15N) were determined in activated sludge, which was exposed to endogenous conditions for 36 days and contained a wide diversity of organisms across several trophic levels. The aim of this study was to elucidate the fluctuation of δ13C and δ15N through trophic transfer in the microbial consortia. The results show that the activated sludge became more enriched with 15N as degradation proceeded. Eventually, the sludge concentrations in the activated sludge decreased from 1610 to 710 mg/L and the δ15N of the sludge increased from 8.3‰ to 10.8‰. In contrast, the δ13C values of the sludge were stable. These findings provide new insights into understanding trophic transfer during microbial community succession and the effects of the feeding process on sludge degradation.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (4 results)

All 2018 2017 2016

All Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] 窒素安定同位体比を用いた嫌気性原生動物の食物環の解明2018

    • Author(s)
      桑原大輝, 荒木信夫, 押木守, 小野寺崇, 高津文人, 珠坪一晃, 山口隆司
    • Organizer
      第52回日本水環境学会年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Changes in Carbon and Nitrogen Stable Isotope Ratio of Biomass and Macrofauna in Down-flow Hanging Sponge Reactor2017

    • Author(s)
      Takashi ONODERA, Kengo KUBOTA, Akinori IGUCHI, Akihiro NAGAMACHI, Tadashi TAGAWA, Gen KANAYA, Kazuaki SYUTSUBO
    • Organizer
      WET2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Determination of Trophic Relationships Within Biotic Community In Down-flow Hanging Sponge Reactor For Sewage Treatment2017

    • Author(s)
      T. Onodera, K. Kubota, A. Iguchi, A. Nagamachi, T. Tagawa, G. Kanaya and K. Syutsubo
    • Organizer
      10th International Conference on Biofilm Reactors
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 窒素安定同位体比を用いた活性汚泥における捕食の進行度の把握2016

    • Author(s)
      小野寺崇,珠坪一晃,金谷弦,水落元之,幡本将史,山口隆司
    • Organizer
      土木学会第71回年次学術講演会
    • Place of Presentation
      東北大学(仙台)
    • Year and Date
      2016-09-09
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2019-03-29  

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