| Project/Area Number |
17K06616
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Civil and environmental engineering
|
|---|
| Research Institution | Gifu University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
李 富生 岐阜大学, 流域圏科学研究センター, 教授 (10332686)
|
|---|
| Project Period (FY) |
2017-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Keywords | 水道 / 溶存有機物 / 残留塩素 / 浄水スラッジ / 汚泥間隙水 / 粉末活性炭吸着 / 汚泥管理 / 排水管理 / スラッジ間隙水 / 送水過程 / 水道水質管理 / 塩素消費性 / 有機物分画 |
|---|
| Outline of Final Research Achievements |
In this study, highly chlorine-consuming dissolved organic matters (DOM), which is not be found in raw water and difficult to be removed from water with a powdered activated carbon application, were found in the sludge filtrate in the return water to source water in a purification plant with a closed system.
Especially in summer when the sludge was kept in a concentration tank at high temperature under anoxic condition, the sludge filtrate could have high DOM concentration including the highly chlorine-consuming DOM, which indicates that sludge management such as sludge storage under the aerobic condition in a shorter period is required for residual chlorine control in purified water in sending pipes.
|
| Academic Significance and Societal Importance of the Research Achievements |
浄水場内で発生した排水等を着水井に返送し，水を有効活用するクローズドシステムを採用している浄水場における，水中の溶存有機物の特徴を把握し，返送水に原水にはない有機物が含まれていることを示した。またこの有機物が塩素消費性が高く粉末活性炭吸着しにくい成分であること，発生する汚泥を嫌気雰囲気で比較的高い温度で貯留した場合に発生することなどを明らかにし，クローズドシステムを採用している浄水場において汚泥貯留における監視や管理が重要であることを指摘した。
|
