2013 Fiscal Year Final Research Report
Fasibility of microbial community control in activated sludge by a high-pressure jet device
| Project/Area Number |
24656311
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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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 | Tokyo University of Agriculture and Technology |
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Principal Investigator |
HOSOMI Masaaki 東京農工大学, 工学(系)研究科(研究院), 教授 (90132860)
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| Co-Investigator(Kenkyū-buntansha) |
TERADA Akihiko 東京農工大学, 大学院工学研究院, 准教授 (30434327)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 高圧ジェット / 活性汚泥 / 汚泥減容化 / 微生物破砕 / 有機物除去 / 窒素除去 / フロック / 汚泥沈降性 |
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| Research Abstract |
This study investigated performance of excess sludge reduction and transition of microbial community in an activated sludge system where a high-pressure jet device (HPJD) was installed for sludge reduction. This device was installed in a recirculation line where concentrated sludge from a sedimentation tank was recycled to the original activated sludge tank. The system installing an HPJD allowed excess activated sludge reduction by 65% compared with that without the HPJD and, in addition, changed bacterial and eukaryotic community structures. The HPJD disaggregated flocs of activated sludge, which allowed for proliferation of protozoa rather than metazoa.
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