| Project/Area Number |
16H06996
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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 |
Environmental engineering and reduction of environmental burden
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| Research Institution | Hiroshima University |
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Principal Investigator |
Ohno Masaki 広島大学, 環境安全センター, 助教 (40781216)
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| Research Collaborator |
OKUDA Tetsuji 龍谷大学, 理工学部, 准教授
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| Project Period (FY) |
2016-08-26 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 逆浸透膜 / ファウリング制御 / 次亜塩素酸 / ナノバブル / バイオファウリング / 次亜塩素酸ナトリウム / 環境保全 / 排水処理技術 / 洗浄技術 |
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| Outline of Final Research Achievements |
We examined an application of a new washing method with hypochlorite and nanobubble for control of combined fouling by biofilm formation and inorganic particle accumulation on reverse osmosis (RO) membrane in this study. Nanobubble with less than 1 μm of bubble diameter can intrude within the gap of the biofilm or the deposits on the membrane and makes detachment improved during simultaneous chlorine washing. The washing effect of chlorine with nanobubble washing in controlling of the combined fouling was twice higher than that of chlorine without nanobubble washing. Chlorine with nanobubble washing detached the combined foulant due to an improved floatability. Furthermore, it was clarified that the density of the combined foulant influenced the fouling control.
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