2022 Fiscal Year Research-status Report
Establishment of Stable Granular Symbiosis of Microalgae and Bacteria with Well Separated Oxygenic Photosynthesis and N2 Fixation in Its Layered Structure
| Project/Area Number |
22K19863
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| Research Institution | University of Tsukuba |
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Principal Investigator |
雷 中方 筑波大学, 生命環境系, 准教授 (30634505)
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| Co-Investigator(Kenkyū-buntansha) |
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, 教授 (20272156)
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| Project Period (FY) |
2022-06-30 – 2025-03-31
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| Keywords | Algal-bacterial granule / N2 fixation / Carbon neutrality |
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| Outline of Annual Research Achievements |
(1) The cyanobacteria dominated granule system was established using the mixture of NIES1726 and 1728 for nitrogen fixation, and the utilization of carbon and nitrogen species with or without N2 recirculation was examined.
(2) The stability and performance of algal-bacterial granules were assessed by treating aquaculture water with almost no soluble N and organic C.
(3) Six related high-quality articles were published with 15 reports (two keynote speeches)in international conferences during this fiscal year.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
Due to the fact that we have rich experiences and operated the mature algal-bacterial granule system for three years, we easily established the target new granule system dominated by cyanobacteria.
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| Strategy for Future Research Activity |
(1) Compare the performance and stability of the cyanobacteria dominated granules and the common algal-bacterial granules under different operating conditions;
(2) Identify the role of each component of extracellular polymeric substances (EPS) in the maintenance of stable algal-bacterial granules;
(3) Put forward the solutions for stable layered structure of algal-bacterial granules during the long-term treatment of low-strength wastewater; and
(4) Further investigate the pathways of C and N inside the granules when only N2 and/or CO2 is supplied.
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[Journal Article] Highly efficient carbon assimilation and nitrogen/phosphorus removal facilitated by photosynthetic O2 from algal-bacterial aerobic granular sludge under controlled DO/pH operation2023
Author(s)
Li Z., Wang J., Liu J., Chen X., Lei Z.*, Yuan T., Shimizu K., Zhang Z., Lee D.-J., Lin Y., Adachi Y., van Loosdrecht M.C.M.
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Journal Title
Water Research
Volume: 238
Pages: 120025
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] A review on recovery of extracellular biopolymers from flocculent and granular activated sludges: Cognition, key influencing factors, applications, and challenges2022
Author(s)
Chen X., Lee Y.-J., Yuan T., Lei Z.*, Adachi Y., Zhang Z., Lin Y., van Loosdrecht M.C.M.
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Journal Title
Bioresource Technology
Volume: 363
Pages: 127854
DOI
Peer Reviewed / Int'l Joint Research
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[Presentation] Response of Broken Microalgae Granules to Different Influent Phosphorus Concentrations: Re-granulation, Granule Stability, and Phosphorus Recovery2023
Author(s)
Qian Wang, Hui Li, Xingyu Chen, Qingyue Shen, Jixiang Wang, Fengmin Li, Zhenya Zhang, Zhongfang Lei*, Tian Yuan
Organizer
The 1st International Conference on Bioprocess and Sustainability (ICBS2023)
Int'l Joint Research
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