2015 Fiscal Year Final Research Report
Development of the high performance control techniques and elucidation of the nitrogen removal mechanism of a novel wastewater treatment system without external aeration
| 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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| Keywords | DHSリアクター / アンモニア硝化 |
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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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| Free Research Field |
環境保全工学
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