2018 Fiscal Year Final Research Report
Micro algae production system using purified municipal wasterwater by membrane bioreactor
| Project/Area Number |
16H04440
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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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| Research Field |
Civil and environmental engineering
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| Research Institution | Chuo University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
木村 克輝 北海道大学, 工学研究院, 教授 (10292054)
羽深 昭 中央大学, 理工学部, 助教 (30735353)
山村 寛 中央大学, 理工学部, 准教授 (40515334)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 都市下水 / 膜分離活性汚泥法 / 処理水再利用 / 微細藻類培養 |
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| Outline of Final Research Achievements |
Treated municipal wastrwater by MBR was reused for the cultivation of microalgae. Microalgae can be use as the source of protein for theaquaculture. The results obtained in the research can be summarized as follows:
1) MBR: Buffled MBR can be operated by controlling the cycle time in bMBR and ORP in the inner part of buffles to maintain the optomum nitrogen oncentration for the microalgae cultivation. Operation nerg of bMBR was reduced to 0.2 kwh/m3 by using the long (3 m) and high density PTFE membrane module, 2)MIcroalgare:P. Ellipoidea was selected which has the optimum growth pH of 3.0. Protein content of about 18% was obtained, which is almost the same as a sardine.
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| Free Research Field |
水環境工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果により、「水・エネルギ－・食料」のNEXUSに、都市下水を膜分離活性汚泥法(MBR)で処理し、処理水により微細藻類を培養するシステムを導入できる可能性が示唆された。今後は、生産した微細藻類の価値とコストの検討が必要である。なまこ、牡蠣の養殖に使用できる可能性は確認できた。鮎が少ない河川では川底に付着藻類が繁茂して景観を損ねる問題が生じている。微細藻類により稚鮎を養殖し、河川放流すればこの問題も解決し、鮎資源の確保による経済効果も見込める。
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