2023 Fiscal Year Final Research Report
Development of electromagnetic force-type seawater-purification-unit for ballast water
| Project/Area Number |
19H02361
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 24020:Marine engineering-related
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| Research Institution | Kobe University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
梅田 民樹 神戸大学, 海事科学研究科, 准教授 (90243336)
岩本 雄二 神戸大学, 海事科学研究科, 准教授 (80244680)
長松 隆 神戸大学, 海事科学研究科, 教授 (80314251)
青木 誠 お茶の水女子大学, 基幹研究院, 基幹研究院研究員 (40796059)
細井 祥子 (田辺祥子) 滋賀県立大学, 環境科学部, 准教授 (80423226)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | ローレンツ体積力 / バラスト水浄化 / 海水・油分離 |
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| Outline of Final Research Achievements |
We have researched on applying electromagnetic seawater/oil separation equipment to ballast water treatment. In this study, we have focused not only on the seawater flow inside the separator, but also on the mechanism of the separation force that acts on impurities. Research on seawater flow has shown that separation performance can be improved by reducing the electrode width. In addition, vortices generated in the separation space under high Lorentz-body-force decrease the separation force. These can be suppressed by installing a straighten plate in the separation space. However, in the case that the Lorentzian body force is not large, installing the straighten plate is disadvantageous for separation. In order to solve this problem, it may be necessary to consider the coupling effect of the local flow around the impurity and the seawater flow in the channel.
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| Free Research Field |
船舶海洋工学
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| Academic Significance and Societal Importance of the Research Achievements |
現在，バラスト水処理で主流となる方式は，フィルターを用いて大きな生物の物理濾過が行なわれている．バラスト水中の不純物濃度が高い場合，フィルター洗浄が頻繁に行われるため，処理が進まない問題がある．電磁力型海水・油分離装置は，整流板を用いて電極幅方向の流路幅を小さくすることで高い分離性能を得られることが分かってきており，処理量の問題を克服できればフィルターに代るデバイスとなる可能性を秘めている．
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