2012 Fiscal Year Final Research Report
Improvement of solid-liquid separation and nutrient removal in wastewater treatment plant by controlling filamentous bacteria
| Project/Area Number |
23710087
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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 |
Environmental technology/Environmental materials
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| Research Institution | Yokohama National University |
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Principal Investigator |
NITTAMI Tadashi 横浜国立大学, 大学院・工学研究院, 特別研究教員 (20377089)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 環境技術 / 微生物 / 土木環境システム / バイオリアクター / 化学工学 / 国際情報交流 / オーストラリア |
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| Research Abstract |
Filamentous bacteria belonging to the phylum Chloroflexi were frequently identified in activated sludge systems, where their presence seriously compromised liquid/solid phase separation in the secondary clarifiers. In municipal wastewater treatment plants, particularly in summer, levels of these filamentous Chloroflexi correlated with biomass sludge volume index. Also, a competitor probe was designed for the precise identification of filamentous Chloroflexi in FISH experiment. A hydrophilic polytetrafluoroethylene membrane was developed to allow effective liquid/solid phase separation of activated sludge.
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