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Development of advanced coating array technology and trial production of high-performance electrodes by elucidating the adhesion mechanism of methanogen

Research Project

Project/Area Number 20K20315
Project/Area Number (Other) 17H06296 (2017-2019)
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund (2020)
Single-year Grants (2017-2019)
Research Field Environmental conservation measure and related fields
Research InstitutionTohoku University

Principal Investigator

Tada Chika  東北大学, 農学研究科, 准教授 (30413892)

Co-Investigator(Kenkyū-buntansha) 関口 貴子  国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (50738086)
高橋 英志  東北大学, 環境科学研究科, 教授 (90312652)
Project Period (FY) 2017-06-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000)
Fiscal Year 2020: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Keywordsメタン菌 / カソード電極 / プリンタ / CNT / 分散 / 付着 / 微生物燃料電池 / 付着性 / 表面処理 / 配向 / 分散剤 / メタン変換速度 / メタン菌カソード電極 / 表面付着 / メタン菌カソード / 炭素素材 / 微生物人為配置
Outline of Research at the Start

近年、燃料電池によって発電する仕組みが注目されている。その中で、微生物を用いるものを微生物燃料電池という。微生物燃料電池では、有機性排水などの有機物から微生物が水素を生産し、その水素からの電子を、これまでは、カソード電極の白金などのレアメタルを用いて、空気中の酸素と水素を反応させ、水をつくることで電子を受け取っていた。本研究では、メタン菌を白金の代わりの触媒に利用し、二酸化炭素と水素を反応させ、メタンガスを得ながら、電子を受け取るメタン菌カソード電極を作成し、性能評価してきた。ここではさらにその性能を高めるための、メタン菌と電極素材の付着をコントロールすることを目的に行なっている。

Outline of Final Research Achievements

With the goal of establishing "microorganism printer" that artificially and freely aligns and attaches methanogens to the electrode surface, (1) elucidation of the adhesion mechanism of methanogens, and (2) dispersion of highly attached CNT of methanogens (3) Accumulation methanogen on the electrode for a short time , and manufacture high-performance electrodes. As a result, (1) Methanothermobacter thermautotrophicus had a good adhesion to that COOH and OH groups on the electrode surface at a ratio of 1: 0.65, and (2) had a high affinity with single-layer supergrowth CNTs. In addition, BSA 0.5 mg / L was suitable as the CNT dispersion. (3) At -600 mV (vs. Ag/AgCl), methanogen adhered to 107 copies/electrode in 2 days. A 7.5-fold higher current density was obtained by microbial fuel cell which methanogen adhered twice as densely. As for the electrode orientation, the same methane conversion rate was obtained even with 1/10 of methanogen as compared with the non-alignment.

Academic Significance and Societal Importance of the Research Achievements

本研究により、メタン菌をカソード電極とした高性能な微生物燃料電池の作製が可能になるための基礎データを得ることができた。これにより、これまで、白金などのレアメタルが必要だった、触媒反応が、メタン菌のような、どこでも手に入り、安価な材料として利用可能になること、また、CO2を有効なエネルギーガスのCH4に変換しながら、電力を得る新たな微生物燃料電池技術の基礎技術ができ、今後、その応用に向けての足掛かりを得た。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (8 results)

All 2020 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Functional Group Distribution of the Carrier Surface Influences Adhesion of Methanothermobacter thermautotrophicus2020

    • Author(s)
      Umetsu Masaki、Sunouchi Takaaki、Fukuda Yasuhiro、Takahashi Hideyuki、Tada Chika
    • Journal Title

      Archaea

      Volume: 2020 Pages: 1-8

    • DOI

      10.1155/2020/9432803

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electricity Generation by a Methanogen Cathode Microbial Fuel Cell,2020

    • Author(s)
      Masaki Umetsu, Yasuhiro Fukuda, Hideyuki Takahashi, Chika Tada
    • Journal Title

      Journal of Animal Production Environment Science

      Volume: 19(1) Pages: 17-27

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Electricity Generation with a Fed-Batch Type and a Continuous Type Methanogen Cathode Microbial Fuel Cell2018

    • Author(s)
      Masaki UMETSU, Yasuhiro FUKUDA, Hideyuki TAKAHASHI, Chika TADA
    • Organizer
      Water and Environment Technology Conference2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Methane production in the fed-batch Microbial Fuel Cell2018

    • Author(s)
      Masaki UMETSU, Yasuhiro FUKUDA, Hideyuki TAKAHASHI, Chika TADA
    • Organizer
      10th Asian Symposium on Microbial Ecology(ASME)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 微生物燃料電池におけるアノードでのメタン菌増殖とその解決法2018

    • Author(s)
      梅津将喜, 福田康弘, 高橋英志, 多田千佳
    • Organizer
      日本畜産環境学会第17回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Electricity Generation with a Fed-Batch Type and a Continuous Type Methanogen Cathode Microbial Fuel Cell..2018

    • Author(s)
      Umetsu M, FukudaA Y, Takahashi H, Tada C.
    • Organizer
      The Water and Environment Technology Conference 2018
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] バッチ式微生物燃料電池におけるメタンガス生産2018

    • Author(s)
      梅津将喜, 福田康弘, 高橋英志, 多田千佳.
    • Organizer
      日本微生物生態学会 第32回大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 微生物燃料電池におけるアノードでのメタン菌増殖とその解決法.2018

    • Author(s)
      梅津将喜, 福田康弘, 高橋英志, 多田千佳.
    • Organizer
      日本畜産環境学会 第17回大会
    • Related Report
      2017 Annual Research Report

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Published: 2017-07-21   Modified: 2024-03-26  

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