| Project/Area Number |
23K23723
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| Project/Area Number (Other) |
22H02458 (2022-2023)
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Multi-year Fund (2024)
Single-year Grants (2022-2023) |
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| Section | 一般 |
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| Review Section |
Basic Section 41030:Rural environmental engineering and planning-related
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| Research Institution | Okayama University |
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Principal Investigator |
Maeda Morihiro 岡山大学, 環境生命自然科学学域, 教授 (00355546)
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| Co-Investigator(Kenkyū-buntansha) |
赤尾 聡史 同志社大学, 理工学部, 教授 (30448196)
仁科 勇太 岡山大学, 異分野基礎科学研究所, 教授 (50585940)
諸泉 利嗣 岡山大学, 環境生命自然科学学域, 教授 (60230174)
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| Project Period (FY) |
2024-04-01 – 2025-03-31
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| Project Status |
Completed (Fiscal Year 2024)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2024: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2022: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Keywords | リン / 窒素 / 酸化還元 / メタン / 微生物燃料電池 / 温室効果ガス / 酸化還元電位 / 微生物群集 / 底質微生物燃料電池 / 農業排水路 / 水質 / バイオ炭 |
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| Outline of Research at the Start |
農業排水路には周辺から流出した肥沃な土壌が堆積しており，水質改善や温室効果ガス排出削減が求められる．底質微生物燃料電池（SMFC）によって酸化還元電位を高く維持すれば，リン溶出やメタン（CH4），一酸化二窒素（N2O）排出を削減できると考えた．しかしそのためには，電極に接しない底質を含めた面的対策が必要となる．そこで，発電菌の基質である酸化鉄と高導電性ナノバイオ炭を底質に混和することを発案した．本研究では水質保全・気候変動対策の同時達成に加え，地域未利用資源の活用，小規模発電が可能な技術を目指す．
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| Outline of Final Research Achievements |
We showed that the addition of iron oxide to sediment microbial fuel cells was effective in suppressing phosphorus release from the sediment in the short term, but may increase P release in the long term because of enhanced organic matter decomposition. Results of bacterial community analysis showed that SMFC increased the relative abundance of Proteiniclasticum and Anaerolinea, which are involved in organic matter degradation, and predicted their function in sulfur oxidation. The relative abundance of Cryptanaerobacte involved in phenol degradation increased with Fe application. These results are consistent with the nutrient cycle dynamics in SMFC application. For biochar development, the relationship between material properties and SMFC performance was clarified.
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| Academic Significance and Societal Importance of the Research Achievements |
底質微生物燃料電池は小規模発電だけでなく，土壌た水質の保全にも役立つ技術である．
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