| Project/Area Number |
21860019
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Hokkaido University (2010)
The University of Tokyo (2009) |
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Principal Investigator |
OSHIKI Mamoru Hokkaido University, 大学院・工学研究院, 博士研究員 (90540865)
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| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥2,171,000 (Direct Cost: ¥1,670,000、Indirect Cost: ¥501,000)
Fiscal Year 2010: ¥1,105,000 (Direct Cost: ¥850,000、Indirect Cost: ¥255,000)
Fiscal Year 2009: ¥1,066,000 (Direct Cost: ¥820,000、Indirect Cost: ¥246,000)
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| Keywords | 脱窒 / 活性汚泥 / ポリヒドロキシアルカン酸 / PHA |
|---|
| Research Abstract |
Up to 28% of biodegradable organic matters in sewage was tentatively stored as PHA under denitrifying condition. This outcome suggested that the occurrence of temporal carbon storage decreased the availability of biodegradable organic matters for denitrification. In order to consider an operational condition to decrease the magnitude of PHA accumulation under denitrifying condition, a sets of batch experiments were conducted and the amounts of accumulated PHA were compared. Prior to the batch experiment, the author developed a novel PHA quantifying method using Nile blue A, a fluorescence dye specific for PHA, which enabled us to determine PHA concentrations in activated sludge within only 5 minutes. The outcome of the batch experiments showed that the addition of methanol, low pH condition and continuous feeding of substrate significantly decreased the amounts of PHA accumulated under denitrifying condition.
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