2023 Fiscal Year Final Research Report
Application of advanced oxidation process combining microbubbles and plasma to decentralized low carbon sewage treatment facility
| Project/Area Number |
21K05879
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 41050:Environmental agriculture-related
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| Research Institution | Sasebo National College of Technology |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | マイクロバブル / プラズマ / 水処理 / 促進酸化 |
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| 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.
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| Free Research Field |
混相流
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| 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。
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