| 研究課題/領域番号 |
22K19863
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| 研究種目 |
挑戦的研究(萌芽)
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| 配分区分 | 基金 |
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| 審査区分 |
中区分64:環境保全対策およびその関連分野
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| 研究機関 | 筑波大学 |
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研究代表者 |
雷 中方 筑波大学, 生命環境系, 准教授 (30634505)
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| 研究分担者 |
原 田 筑波大学, 生命環境系, 助教 (80868258)
張 振亜 筑波大学, 生命環境系, 名誉教授 (20272156)
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| 研究期間 (年度) |
2022-06-30 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
6,240千円 (直接経費: 4,800千円、間接経費: 1,440千円)
2024年度: 1,690千円 (直接経費: 1,300千円、間接経費: 390千円)
2023年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2022年度: 3,250千円 (直接経費: 2,500千円、間接経費: 750千円)
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| キーワード | Algal-bacterial granule / Nitrogen fixation / Carbon neutrality / Resource recovery / N2 fixation / Functional biomass |
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| 研究開始時の研究の概要 |
This research for the first time will establish a well separated oxygenic photosynthesis and N2 fixation in the outer and inner layers of algal-bacterial aerobic granular sludge biosystem that can efficiently treat waste/wastewater with no C and/or N, and simultaneously produce functional biomass.
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| 研究実績の概要 |
(1) Cyanobacteria cells and its granules exhibited higher nitrate than ammonia removal capacity, in which cyanobacteria granules can uptake 100% of nitrate and fix a large amount of N2 into granular biomass, especially under N2 recirculation condition.
(2) Dissolved oxygen and pH were found the two crucial parameters for the stable operation of granule system. The proposed future algal-bacterial granule-based wastewater treatment plants can remove all CO2 produced in the plants.
(3) Besides three invited reports in international conferences/seminars, seven high-quality papers with a total impact factor of 87.9 were published.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
We have already achieved the expected targets of the project, i.e. N fixation and carbon neutrality with no need of mechanical aeration, the most energy-intensive operation in wastewater treatment plants if algal-bacterial granules are applied in their biological treatment units.
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| 今後の研究の推進方策 |
(1) Examine the sensitivity of algal-bacterial granules to different types of carbon and nitrogen sources and different salinity levels;
(2) Search a simple and feasible means to maintain the stable granule's layered structure with less or no greenhouse gases (GHGs) emission from the established algal-bacterial granule system; and
(3) Figure out the role of microalgae and/or cyanobacteria in reduced GHGs emission from the granule system.
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