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http://dx.doi.org/10.17663/JWR.2018.20.2.145

Analysis of the particulate matters in the vertical-flow woodchip wetland treating stormwater from paved road  

Yuan, Qingke (Department of Environmental Engineering, Hanseo University)
Kim, Youngchul (Department of Environmental Engineering, Hanseo University)
Publication Information
Journal of Wetlands Research / v.20, no.2, 2018 , pp. 145-154 More about this Journal
Abstract
In this study, three pilot-scale wetland systems were built for treating stormwater runoff from asphalt road. Each of the system consists of a settling tank and a vertical flow wetland packed with 25%, 50%, and 75% woodchip as treatment media. According to the analysis of the distributions of particle size, it was found that solids ranging in size $0.52-30{\mu}m$ were predominant in the stormwater runoff. After 24-hours settling, those coarser than $20{\mu}m$ were significantly detained. Further retention, especially for the finer-sized fraction, occurred in the wetland through internal recirculation during the dry day periods. As a primary media of the wetland, woodchip showed a high filtration and attachment capacity for the particulates in pre-settled stormwater, whereas overall amount of solids in the wetland effluent increased due to the detachment of woody elements from the media. This was observed mainly during the initial 75 days of operation, and the size and detachment rate were found to be strongly related with the woodchip packing ratio. The mechanism involving woody particle detachment was modeled as a first-order form. In addition, water quality factors and operational parameters affecting the detachment were analyzed and discussed.
Keywords
Particle detachment; stormwater; vertical-flow wetland; woodchip;
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연도 인용수 순위
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