| Project/Area Number |
18K19873
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 64:Environmental conservation measure and related fields
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2018-06-29 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 廃水処理 / メタン / 微生物 / 嫌気共生細菌 / 導電性物質 / アーキア / 担体 / 嫌気性微生物 / 脱窒 / 電子伝達 / 嫌気共生 |
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| Outline of Final Research Achievements |
Effective anaerobic microbial carrier, which was mixing the conductive materials into polyvinyl alcohol (PVA), was developed in this study. Using the newly developed microbial carrier the ratio of methanogens and anaerobic syntrophic microorganisms were largely increased compared to conventional PVA microbial carriers. This showed novel microbial carrier holds key microorganism of anaerobic digestion effectively. It was also possible to culture only the microorganisms retained in this carrier as a source of inoculation. For enrichment of denitrifying anaerobic methane oxidation microorganisms, the way of methane supplying is key parameters and direct supply of methane from atmosphere is more appropriate than membrane permeation.
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| Academic Significance and Societal Importance of the Research Achievements |
微生物増殖担体に導電性物質を混合するだけという非常に簡単な方法でメタン発酵の鍵となるメタン生成古細菌や嫌気共生細菌を効率的に担体に保持できるため、メタン発酵法の安定化に貢献できる技術である。また嫌気性微生物の新しい培養方法としても活用できる成果であり、学術的意義も非常に高い。また嫌気性メタン酸化脱窒微生物の培養では基質であるメタンの供給方法が鍵であることがわかり、今後の研究開発の方向性の一つとなりうる。
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