| Project/Area Number |
26820219
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | DHSリアクター / アンモニア硝化 / DHS / 低温 |
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| Outline of Final Research Achievements |
The first experiment conducted OUR test in temperature condition of 5-20 degrees Celsius for the carrier of a DHS reactor treating artificial sewage. The OUR became the low value with a temperature fall, but the microbial activity for the organic matter oxidation and the nitrification reaction functioned under the low temperature condition of 5 degrees Celsius. And, for safety design of the effective volume to apply a DHS in a low temperature condition, effective volume of around 4 times of the design of the normal temperature condition was necessary. The next experiment fed an actual methane fermentation digestion liquid of the high nitrogen concentration to a DHS reactor by several feeding methods to examine the control techniques which enabled the organic matter removal and partial nitrification. As a result, around 90% of ammonia nitrogen was able to accumulate in treated water as nitrite nitrogen when flow into the DHS by step-feeding while preventing the pH fall.
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