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Development of an ammonia-inhibition control system in microalgal cultivation

Research Project

Project/Area Number 21K14903
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 40030:Aquatic bioproduction science-related
Research InstitutionJapan Agency for Marine-Earth Science and Technology (2022)
Soka University (2021)

Principal Investigator

Kishi Masatoshi  国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 特別研究員(PD) (00824020)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords微細藻類 / アンモニア / 阻害 / クロロフィル蛍光 / モニタリング / 循環型社会 / 蛍光 / 資源循環
Outline of Research at the Start

廃棄物由来のアンモニアや二酸化炭素から微細藻類を生産することで循環型社会の経済的インセンティブ創成が期待される。一方で遊離アンモニア(NH3)は高い毒性を有するためNH3を適切な濃度に維持する制御法が必要となる。本研究は蛍光により藻類の光合成活性を直接モニタリングし阻害を防止する、新たなアンモニア供給法の開発を目指す。特にパルス変調蛍光とより安価な多波長蛍光に着目し、技術確立から長期培養による実用性試験までを実施する。

Outline of Final Research Achievements

Microalgae have the potential to produce valuable products using nutrients and CO2 derived from organic waste, contributing to the formation of a circular society. However, a significant portion of the nutrients is in the form of toxic ammonia (NH3), making direct utilization challenging. If we can control the supply to ensure that NH3 concentration remains below inhibitory levels, direct utilization of waste becomes possible. In this study, we aimed to establish a fluorescent-based NH3 inhibition detection method. The results revealed that fluorescence analysis using multiple excitation wavelengths and pulse-modulated fluorescence analysis can detect ammonia inhibition within a few minutes of exposure. Furthermore, by combining multivariate analysis, it was possible to mitigate variations caused by environmental factors.

Academic Significance and Societal Importance of the Research Achievements

これまで無希釈消化液などの高濃度アンモニア含有水を直接供給して藻類培養に成功した例は耐性の極端に強い種などに限られるが、本研究で開発している技術が実現すれば、ほとんどの藻類種で直接供給を可能にする。さらに、クロロフィル蛍光と多変量解析との組み合わせにより、アンモニア阻害だけでない広範な藻類の生理状態判別および大量培養の生産性向上に応用できると期待される。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (15 results)

All 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Int'l Joint Research] バハルダール大学/タナ湖周辺水域保護開発機構/インジバラ大学(エチオピア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] バリャドリード大学(スペイン)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] チェコ科学アカデミー藻類技術研究所(チェコ)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] 2021年日本ベントス・日本プランクトン学会合同大会 自由集会 「クロロフィル蛍光を用いた藻類研究の最前線」開催報告2022

    • Author(s)
      風間健宏,小原静夏,岸正敏,湯浅光貴
    • Journal Title

      Bulletin of the Plankton Society of Japan

      Volume: 69 Issue: 1 Pages: 57-57

    • DOI

      10.24763/bpsj.69.1_57_1

    • ISSN
      0387-8961, 2434-0839
    • Year and Date
      2022-02-25
    • Related Report
      2021 Research-status Report
  • [Journal Article] Characterization of Mixing by CFD Simulation and Optimization of Mixing Frequency to Break Scum and Enhance Methane Yield in Chinese Dome Digester2022

    • Author(s)
      Agborambang Mfor E.、Fujiwara Masaaki、Bhatia Pranshu、Kishi Masatoshi、Sekine Mutsumi、Salangsang Maria Cecilia D.、Matsuyama Tatsushi、Toda Tatsuki
    • Journal Title

      BioEnergy Research

      Volume: - Issue: 3 Pages: 1902-1912

    • DOI

      10.1007/s12155-022-10519-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microalgal flocculation and sedimentation: spatiotemporal evaluation of the effects of the pH and calcium concentration2022

    • Author(s)
      Xia Yuanjun、Kishi Masatoshi、Sugai Youta、Toda Tatsuki
    • Journal Title

      Bioprocess and Biosystems Engineering

      Volume: 45 Issue: 9 Pages: 1489-1498

    • DOI

      10.1007/s00449-022-02758-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhanced growth of Chromochloris zofingiensis through the transition of nutritional modes2022

    • Author(s)
      Chowdhary Anupreet Kaur、Kishi Masatoshi、Toda Tatsuki
    • Journal Title

      Algal Research

      Volume: 65 Pages: 102723-102723

    • DOI

      10.1016/j.algal.2022.102723

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anaerobic Digestion Effluent Purification using Activated Sludge Process, Slow Sand Filtration, and Activated Carbon Filtration2022

    • Author(s)
      Fujita Akinori、Kishi Masatoshi、Sekine Mutsumi、Toda Tatsuki
    • Journal Title

      Journal of the Japan Society of Material Cycles and Waste Management

      Volume: 33 Issue: 0 Pages: 1-10

    • DOI

      10.3985/jjsmcwm.33.1

    • NAID

      130008166336

    • ISSN
      1883-5856, 1883-5899
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Biomethane from microalgae2022

    • Author(s)
      Bhatia Pranshu、Akizuki Shinichi、Kishi Masatoshi、Habtu Nigus Gabbiye、Legesse Solomon Addisu
    • Journal Title

      3rd Generation Biofuels

      Volume: - Pages: 463-503

    • DOI

      10.1016/b978-0-323-90971-6.00034-6

    • ISBN
      9780323909716
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] アンモニア供給法の改善によるハプト藻Isochrysis galbanaの高密度培養2022

    • Author(s)
      岸正敏, 古谷研, 後藤緑, 関根睦実, 戸田龍樹
    • Organizer
      日本水環境学会年会講演集
    • Related Report
      2022 Annual Research Report
  • [Presentation] 排水を用いた藻類生産におけるアンモニア毒性検知技術の開発2022

    • Author(s)
      岸正敏, 小松一弘, 土屋健司
    • Organizer
      日本プランクトン学会報
    • Related Report
      2022 Annual Research Report
  • [Presentation] Chlorophyll fluorescence response towards ammonia toxicity: ammonia detection in algal ponds2022

    • Author(s)
      Kishi M., Tsuchiya K., Komatsu K.
    • Organizer
      13th IWA Specialist Conference on Wastewater Ponds and Algal Technologies (WPAT22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] High NH3 tolerance of Arthrospira platensis and its relation to intracellular pH2022

    • Author(s)
      Sekine M., Yoshida A., Kishi M., Toda T.
    • Organizer
      13th IWA Specialist Conference on Wastewater Ponds and Algal Technologies (WPAT22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Chlorophyll Fluorescence Response towards Ammonia Toxicity: Ammonia Detection in Algal Ponds2022

    • Author(s)
      M. Kishi, K. Tsuchiya and K. Komatsu
    • Organizer
      IWA 13th Wastewater Pond and Algal Technology Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 排水を用いた藻類生産におけるアンモニア毒性検知技術の開発2021

    • Author(s)
      岸正敏、小松一弘、土屋健司
    • Organizer
      2021年日本ベントス・日本プランクトン学会合同大会 自由集会 「クロロフィル蛍光を用いた藻類研究の最前線」
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2024-01-30  

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