| Project/Area Number |
15360288
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
KUBA Takahiro KYUSHU UNIVERSITY, Faculty of Engineering, Associate Professor, 大学院・工学研究院, 助教授 (60284527)
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| Co-Investigator(Kenkyū-buntansha) |
KUSUDA Tetsuya KYUSHU UNIVERSITY, Faculty of Engineering, Professor, 大学院・工学研究院, 教授 (50037967)
OHISHI Kyoko KYUSHU UNIVERSITY, Faculty of Engineering, Research Associate, 大学院・工学研究院, 助手 (20110835)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥15,200,000 (Direct Cost: ¥15,200,000)
Fiscal Year 2005: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 2003: ¥7,100,000 (Direct Cost: ¥7,100,000)
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| Keywords | Denitrification / Dephosphatation / DN-PAO / Isolation / Advanced wastewater treatment / Water quality / Acetate / ASM |
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| Research Abstract |
A brand-new screening equipment was proposed to isolate the denitrifying phosphate-accumulating organisms. A screening work was carried out under the alternating anaerobic-anoxic condition. At only anaerobic phase, acetate was used as a sole organic matter. At the anoxic phase, nitrate as a final electron acceptor and no organic matters were added. Since the inside of equipment was washed with distilled water at the shifting phase from one condition to another condition, acetate and nitrate did not exist simultaneously during the work. As a result of these works using activated sludge in a municipal waste water treatment plant, several kinds of bacteria were obtained. Almost isolated bacteria were able to accumulate polyphosphate and PHB under unique conditions such as alternating anaerobic-anoxic conditions. By microscopy with a staining method it was reasonable to suppose qualitatively that these bacteria were responsible for enhanced biological phosphorus removal. However, it was not quantitatively observed that these pure cultures released phosphate with acetate under anaerobic conditions and consumed phosphate under anoxic conditions.
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