| Project/Area Number |
25850166
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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 |
Rural environmental engineering/Planning
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| Research Institution | Kyushu University |
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Principal Investigator |
NAKANO AKIKO 九州大学, (連合)農学研究科(研究院), 助教 (10631286)
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| Research Collaborator |
VAN PAASSEN Leon Delft University of Technology, Assistant professor
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 地盤環境修復 / 脱窒 / バイオグラウト / 炭酸カルシウム / バイオガス / 不飽和化 / 微生物活性 / 砂質土 / 窒素ガス / 微生物代謝 / グラウト |
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| Outline of Final Research Achievements |
The aim of this study is to develop the new geoengineering technology for soil improvement applying microbial activity. This study evaluated the effect of calcium carbonate precipitation induced by denitrification for the geoengineering properties of sand ground. We established the effective method to extract the inoculum of denitrifying bacteria from natural sediment through some incubations. We confirmed the denitrification by the inoculum and the precipitation in the sand column. The result of the sand model experiments indicated the potential use of the nitrogen gas production through denitrification for desaturation effect of sand ground. The transformation of the gas through sand ground can be controlled by several parameters, such as the bacterial reaction speed, the concentration of the substrates, and the pore size and the structure of sand ground. The farther evaluation is required for the ground application like liquefaction countermeasure and slope stabilization.
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