2015 Fiscal Year Research-status Report
Formation of Granules with High Phosphorus Content to Realize Efficient Phosphorus Recovery from Waste Activated Sludge by Using Anaerobic Digestion Followed by Aerobic Granulation Technology
| Project/Area Number |
15K00599
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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)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | Waste activated sludge / P recovery / P bioavailability / Fermentation liquor / Aerobic granular sludge / Livestock manure |
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| Outline of Annual Research Achievements |
Last year we tested the effects of (1) hydrothermal pretreatment on anaerobic fermentation of waste activated sludge (WAS); (2)ammonia stripping on nitrogen recovery and subsequent anaerobic digestion; and (3)acetate and propionate, the two major volatile fatty acids produced during anaerobic digestion, on the aerobic granulation process and then P accumulation and bioavailability. We also identified P species in the P-rich aerobic granules obtained by combining with enhanced biological P removal process. Moreover, we extended our research object from WAS to livestock manure, and hope to achieve universal findings by using these developed technologies.
Besides two publications in Bioresource Technology and 1 publication in Water Research, respectively, two upcoming publications may be soon accessible: (1)Cai W., Huang W., Yuan T., Ondiba H.A., Lei Z., Zhang Z., 2016. Effect of hydrothermal pretreatment on volatile fatty acids accumulation from anaerobic fermentation of waste activated sludge. Biochemical Engineering Journal (under review).(2)Huang W., Yuan T., Zhao Z., Yang X., Huang W., Zhang Z., Lei Z., 2016. Coupling hydrothermal treatment with stripping technology for fast ammonia release and effective nitrogen recovery from chicken manure. ACS Sustainable Chemistry and Engineering (under revision).
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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
According to the schedule of the proposal and our achievements during last year, we have finished the research works in FY2015 and half of the works in FY2016.
Based on the processes used for P removal in conventional wastewater treatment plants, we are now conducting some experiments on the effect of additives addition on P accumulation into aerobic granular sludge, which is expected to provide some new concept for fast P accumulation and removal by using aerobic granular sludge. This work is also scheduled to be completed in FY2016.
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| Strategy for Future Research Activity |
In the followed-up researches, we will continue to operate the reactors under different conditions, and hope to create some more valuable aerobic granules which contain high phosphorus content with high bioavailability.
We also hope to optimize the operational conditions for P-rich aerobic granules by using fermentation liquor as influent. Besides, more attention will be paid to the safety of recovered phosphorus and its uptake potential by plants.
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| Causes of Carryover |
The remaining amount, 1031 JPY, is very small.
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| Expenditure Plan for Carryover Budget |
This small amount of budget will be used for purchasing chemicals together with this focal year's budget.
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