STUDY ON THE METHOD FOR IMPROVING WATER AND SEDIMENT QUALITY IN SEWAGE WATER INTO TIDAL URBAN RIVER
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- KAKINUMA Daiki
- 中央大学理工学研究科都市環境学専攻
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- NOHARA Hideaki
- 中国電力株式会社 エネルギア総合研究所 土木グループ
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- HIBINO Tadashi
- 広島大学大学院 工学研究科
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- YAMADA Tadashi
- 中央大学理工学研究科 都市環境学専攻
Bibliographic Information
- Other Title
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- 未処理下水が流入する都市感潮河川における水・底質改善手法の検討
- ミショリ ゲスイ ガ リュウニュウ スル トシカン チョウ カセン ニ オケル ミズ ・ テイシツ カイゼン シュホウ ノ ケントウ
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Abstract
In Nihonbashi River in urban area, sludge will accumulated on the riverbed. The sludge is anaerobically decomposed, reduction, and acidification of the organic matter will proceed. Reducing sediment is the key of deterioration of the water environment because it causes hypoxia and sulfur hydride. In this study, the effect of improving water and sediment quality will be verified by the inter-gravel contact structure using the granulated coal ash. The effect of the granulated coal ash was evaluated from change of sediment deposited in sediment trap. As a result, the reduction of total phosphorus, nitrogen, organic matter, n-hexane extracts, and organic matter is depolymerized by river water when flowing through the inter-gravel contact structure. Furthermore, it is also found that purification ability increases the decomposition amount of organic matter by increasing the granulated coal ash layer.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 74 (2), I_1483-I_1488, 2018
Japan Society of Civil Engineers
