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A microbial ecological approach to unravel the sediment remediation mechanism by sediment microbial fuel cells

Research Project

Project/Area Number 19K15938
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 41030:Rural environmental engineering and planning-related
Research InstitutionNational Institute for Environmental Studies

Principal Investigator

Takemura Yasuyuki  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, 特別研究員 (10837199)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords底質改善 / 微生物燃料電池 / メカニズム解析 / 微生物生態 / 堆積物微生物燃料電池 / 栄養塩
Outline of Research at the Start

本研究は、堆積物微生物燃料電池(SMFC)による底質改善機構を探るため、SMFCが及ぼす影響を微生物生態学的側面から評価する試みである。これまで、富栄養化水域の底質にSMFCを適用した場合、底質の嫌気的雰囲気の緩和・硫化水素濃度の抑制・リンの溶出抑制等の底質改善効果を観測している。一方、なぜ底質改善が生じるかは不明であった。そこで本研究はSMFCを適用した場合に生じる①底質の物理化学的性質の変化と、②発電微生物の特定とその動態を解析し、③底質改善に関わる微生物群の動態を網羅的に把握することで、SMFCによる発電と底質改善効果の因果関係を解明するものである。

Outline of Final Research Achievements

To investigate the sediment remediation mechanisms by sediment microbial fuel cells (SMFC), lab-scale experiments was conducted for the sediments collected from sea, river, freshwater lakes, and park ponds. Sediment pore water quality of the both closed-circuit conditions (active as SMFC) and open-circuit conditions (OC) were monitored to investigate the relationship between electron transfer and phosphorus concentration. As a result, phosphorus concentration decreased in freshwater SMFCs than that in OCs. We presumed that the phosphorus may have been electrochemically attracted on the anode in the sediments. Furthermore, Methanoperedens, an anaerobic methane oxidation archaeon capable of generating electricity dominates only in freshwater SMFCs. Suggesting that, methane in the sediment may have been oxidized to promote electricity resulting that electrochemically adsorption of phosphorus was enhanced.

Academic Significance and Societal Importance of the Research Achievements

富栄養湖沼などの底質改善技術として原位置処理が可能な堆積物微生物燃料電池(SMFC)を提案し、本研究により、電極(アノード)の電気化学的作用でリンが吸着されることによって、底泥からのリン溶出が抑制されるものと推察された。また、SMFCを適用した複数種の淡水系の底泥において、発電能を持つことが知られている嫌気性メタン酸化古細菌(Methanoperedens属)が優占したことから、この微生物の機能と発電や底質改善効果との関係性をより詳細に把握することで技術の効率化に繋げられると考えられた。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results) (of which Int'l Joint Research: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Suppression of phosphorus release from eutrophic lake sediments by sediment microbial fuel cells2021

    • Author(s)
      Takemura Yasuyuki, Syutsubo Kazuaki, Kubota Keiichi
    • Journal Title

      Environmental Technology

      Volume: 1 Issue: 17 Pages: 1-9

    • DOI

      10.1080/09593330.2021.1890837

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Sediment microbial fuel cells (SMFC) applied for suppression of P release from the lake sediment2019

    • Author(s)
      Yasuyuki Takemura
    • Organizer
      ISMET7: International Society for Microbial Electrochemistry and Technology Global Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sediment Microbial Fuel Cells Suppressed Phosphorus Release from Eutrophic Lake Bottom2019

    • Author(s)
      Yausyuki Takemura
    • Organizer
      MEWE2019: 8th IWA Microbial Ecology and Water Engineering Specialist Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 底質環境改善用微生物燃料電池2020

    • Inventor(s)
      珠坪一晃、竹村泰幸、山田勝弘、藤野健一
    • Industrial Property Rights Holder
      珠坪一晃、竹村泰幸、山田勝弘、藤野健一
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report

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Published: 2019-04-18   Modified: 2022-01-27  

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