2020 Fiscal Year Annual Research Report
A Sustainable and Recycling-oriented Wastewater Industry by Maximizing Valuable Resources and Energy Recovery Using the Novel Algal-bacterial Aerobic Granular Sludge Technology
| Project/Area Number |
18H03403
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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) |
張 振亜 筑波大学, 生命環境系, 教授 (20272156)
清水 和哉 筑波大学, 国際室, 准教授 (10581613)
水野谷 剛 筑波大学, 生命環境系, 准教授 (10500770)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Keywords | Algal-bacterial AGS; / Bacterial AGS; / Microalgae; / Energy gain; / Resource conservation; / Salinity stress |
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| Outline of Annual Research Achievements |
During year 2020, the followings have been confirmed.
(1) Granulation can be successfully achieved from single cell microalgae by using the similar operation strategy as for naturally growing algae and for activated sludge.
(2) Algal-bacterial aerobic granular sludge (AGS) system has higher and stable potentials for P removal and recovery from wastewater with low energy/carbon source consumption and less influence by salinity due to the co-existence of algae.
(3) Algal-bacterial AGS also possesses higher potential for Cr biosorption and recovery from wastewater under neutral condition, mainly attributable to its effective bioreduction capability, intracellular accumulation and algae participation.
(4) The profits by using this novel system have been estimated in the context of a local wastewater treatment plant.
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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
We have finished most of the designed experiments. Based on the fruitful results from this project during the past three years, we are planning to extend our focus to a new research direction of this novel wastewater treatment system this year.
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| Strategy for Future Research Activity |
(1) to further confirm the resources (especially phosphorus and alginate-like exopolysaccharides) and energy recovery potentials from the continuous operation of the algal-bacterial AGS system.
(2) to compare the differences in energy/resources recovery and greenhouse gases emission reduction between the bacterial AGS and algal-bacterial AGS systems; and
(3) to establish the preliminary model for the algal-bacterial AGS system in the context of a local wastewater treatment plant (WWTP), i.e., Shimodate WWTP in Ibaraki Prefecture.
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[Journal Article] Coupling biogas recirculation with FeCl3 addition in anaerobic digestion system for simultaneous biogas upgrading, phosphorus conservation and sludge conditioning2020
Author(s)
Yuan T., Wang Y., Nuramkhaan M., Wang X., Zhang Z., Lei Z.*, Shimizu K., Utsumi M., Adachi Y., Lee D.-J.
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Journal Title
Bioresource Technolgy
Volume: 315
Pages: 123811
DOI
Peer Reviewed / Int'l Joint Research
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[Presentation] Feasibility of Anaerobic Digestion System Coupling Biogas Recirculation with Chemical Addition for Simultaneous Biogas Upgrading, Phosphorus Recovery and Sludge Conditioning2021
Author(s)
Tian Yuan, Yinxin Wang, Marjangul Nuramkhaan, Xuezhi Wang, Zhenya Zhang, Zhongfang Lei*, Kazuya Shimizu, Motoo Utsumi, Yasuhisa Adachi, Duu-Jong Lee
Organizer
The 4th International Conference on Recent Advancements in Sustainable Management of Livestock Waste and Rural Environment
Int'l Joint Research
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