title: Performance of a half-saturated vertical flow wetland packed with volcanic gravel in stormwater treatment.
abstract: 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.
authors.affiliation: Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea E-mail: ykim@hanseo.ac.kr; School of Earth and Environment, Anhui University of Science and Technology, Huainan City, Anhui Province, 232001, China.
authors.forename: Yaoping
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea E-mail: ykim@hanseo.ac.kr.
authors.forename: Kisoo
authors.initials: K
authors.lastname: Park
authors.affiliation: Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea E-mail: ykim@hanseo.ac.kr.
authors.forename: Siping
authors.initials: S
authors.lastname: Niu
authors.affiliation: Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea E-mail: ykim@hanseo.ac.kr.
authors.forename: Youngchul
authors.initials: Y
authors.lastname: Kim
mesh_terms: D019149:Bioreactors; D003252:Construction Materials; D011891:Rain; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism; D018508:Water Purification; D060753:Water Quality; D053833:Wetlands
chemical_list: D014874:Water Pollutants, Chemical