A half-saturated pilot-scale wetland planted with Acorus calamus was built to treat urban stormwater. The design comprises a sedimentation tank for pretreatment, and a vertical flow volcanic gravel wetland bed equipped with a recirculation device. Eighteen rainfall events were monitored in 2012. The treatment system achieved total removal efficiencies of 99.4, 81, 50, and 86% for suspended solids, organic matter, nitrogen and phosphorus, respectively, and 29, 68, and 25% for copper, zinc, and lead, respectively, at a 3-day hydraulic residence time. In the wetland bed, the removal of ammonia, total nitrogen, and zinc were improved by recirculation. Plant uptake provided 18% of nitrogen removal and 39% of phosphorus removal. During the experimental stage, only 1.4% of the pore volume in substrate was reduced due to clogging, implying that the wetland can operate without clogging for a relatively long period.
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Research Article|
March 28 2014
Performance of a half-saturated vertical flow wetland packed with volcanic gravel in stormwater treatment
Yaoping Chen;
Yaoping Chen
1Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea
2School of Earth and Environment, Anhui University of Science and Technology, Huainan City, Anhui Province, 232001, China
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Kisoo Park;
Kisoo Park
1Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea
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Siping Niu;
Siping Niu
1Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea
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Youngchul Kim
1Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea
E-mail: [email protected]
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Water Sci Technol (2014) 69 (11): 2331–2338.
Article history
Received:
October 29 2013
Accepted:
March 10 2014
Citation
Yaoping Chen, Kisoo Park, Siping Niu, Youngchul Kim; Performance of a half-saturated vertical flow wetland packed with volcanic gravel in stormwater treatment. Water Sci Technol 1 June 2014; 69 (11): 2331–2338. doi: https://doi.org/10.2166/wst.2014.154
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