Nitrogen/phoshorus recovery and digestibility improvement in anaerobic digestion of sewage sludge
| Project/Area Number |
15K06276
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Fukui University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | anaerobic digestion / sewage sludge / nitrogen recovery / phosphorus recovery / ammonia stripping / 嫌気性消化 / 下水汚泥 / バイオガス / 窒素リン回収 / 高濃度嫌気性消化 / アンモニアストリッピング / アンモニア阻害 / リン回収 |
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| Outline of Final Research Achievements |
This study evaluated super-high solids anaerobic digestion fed with sewage sludge of 10-20% total solids (TS), and attempted efficient nitrogen and phosphorus recovery from sewage sludge. Laboratory anaerobic digesters performed well at the hydraulic retention time (HRT) of 20 or 30 days, and showed approximate VS destruction of >50% and gas production of 0.5 NL/gVS. At 15% TS or higher, ammonia stripping was combined for ammonia removal and recovery. The stripping device showed average ammonia recovery of 4.6-16.8 mgN from g influent TS or approximately 40% from influent nitrogen as the highest. The results indicated that methane production is possible up to the influent TS of about 20%, and the side-stream configuration is superior for ammonia recovery. High viscosity and deteriorated dewaterability of digested sludge pose a problem for operation, transport and further processing.
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Report
(4 results)
Research Products
(8 results)
