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Application of advanced oxidation process combining microbubbles and plasma to decentralized low carbon sewage treatment facility

Research Project

Project/Area Number 21K05879
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 41050:Environmental agriculture-related
Research InstitutionSasebo National College of Technology

Principal Investigator

Matsuyama Fuminori  佐世保工業高等専門学校, 機械工学科, 准教授 (30435482)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsマイクロバブル / プラズマ / 水処理 / 促進酸化 / 促進酸化法 / 液中放電 / 水質浄化
Outline of Research at the Start

近年、多発している自然災害や過疎地域の進行により、分散型汚水処理施設(浄化槽)の整備が急務とされる現状に対して、本研究では、独自設計の流体混合装置を用いたマイクロバブルとプラズマを融合する促進酸化法を利用した低炭素小型浄化槽システムの確立を目指している。具体的には、処理水内を流動中の微細気泡群気液界面におけるプラズマ生成条件(印加電圧・電流、溶液ph、気泡径・量)と分解処理速度の関係性を実験的に明らかにし、難分解性モデル有機物質の分解処理効率向上と反応制御に挑む。

Outline of Final Research Achievements

In this study, we have proposed and studied an accelerated oxidation method that combines microbubble and plasma using a uniquely designed fluid mixer to achieve low carbon in small septic tanks intended for home use. The results show that, it was found that increasing the number of edges and the shape of the electrodes in the discharge section is effective, and that the number of pulses, rather than the applied voltage, has an advantage in the oxidation process. In addition, when artificial seawater was used as the treatment solution, it became clear that plasma generation could not be achieved without applying a voltage about twice as high as in the case of tap water, due to the increase in electrical conductivity and the smaller diameter of the generated bubbles. Furthermore, the decomposition of acetic acid was confirmed after 60 minutes of treatment not only with argon gas but also with air as the supply gas.

Academic Significance and Societal Importance of the Research Achievements

家庭用100 vコンセントから駆動可能な本プロセスは、従来の促進酸化法に比べて安価で容易に導入できるため、低炭素社会を推進する上で有用性が高い。また、反応が溶液中のオンサイトで実現・完結するため安心で処理性能が高く、普及と整備が望まれている浄化槽を始めとした小規模な排水処理への応用が可能である。また、殺菌・脱色効果も同時に認められるため、有機物分解のみならず多方面への応用が期待される。さらに、液中の気泡群へのプラズマ形成において、電極の形状やパルス電圧の印加方法、溶液のphや供給気体の違いによる酸化処理へ及ぼす影響は、本システム設計の指針となる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (3 results)

All 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results)

  • [Journal Article] EXPERIMENTAL DEVELOPMENT OF AN ADVANCED OXIDATION PROCESS BY USING FLUID MIXING EQUIPMENT AND PLASMA2021

    • Author(s)
      Fuminori Matsuyama, Kenji Nakashima, Yuuki Johno
    • Journal Title

      Multiphase Science and Technology

      Volume: 33 Issue: 3 Pages: 33-42

    • DOI

      10.1615/multscientechn.2021040278

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 流体混合装置とプラズマを用いた促進酸化法の高効率化に関する研究2022

    • Author(s)
      松山史憲,中島賢治,城野祐生
    • Organizer
      動力・エネルギー技術シンポジウム2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 流体混合装置とプラズマを用いた促進酸化法の応用性に関する研究2021

    • Author(s)
      松山史憲,中島賢治,城野祐生
    • Organizer
      動力・エネルギー技術シンポジウム2021
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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