2016 Fiscal Year Final Research Report
Road surface loading of polycyclic aromatic hydrocarbons flowing into separate sewer during rainfall
| Project/Area Number |
25420557
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | PAHs / 分流式下水道 / 雨水 / 市街地 / 流入 |
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| Outline of Final Research Achievements |
Pollution on urban ground surface areas can be a major PAHs sources of the systems because direct rain inflow occasionally found even in separate sewer systems. In this study, the PAH rainfall inflow into a separate sewer system was investigated. The water influent loading, and their SS, PAHs concentration were measured for rainfall events (n=8), and no rainfall days (n=2; 24-h measurements) at the inlet of wastewater treatment plant. The excess inflow of water and PAHs during the rainfall were estimated from the results. From the comparison to rainfall and no rainfall periods, substantial PAHs loading during the rainfall events were observed. The yearly water loading contribution into the plant was evaluated up to only around 1%, while that of PAHs were evaluated up to five percent. From the measurements and the estimation, while the water inflow is limited, PAHs rain inflow loading can be higher even in separate combined sewer system.
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| Free Research Field |
水環境工学
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