半饱和垂直流湿地在雨水处理中用火山砾石填充的性能。

Performance of a half-saturated vertical flow wetland packed with volcanic gravel in stormwater treatment.

机构信息

Department of Environmental Engineering, Hanseo University, Seosan City, Chungnam, 356-706, Korea E-mail:

出版信息

Water Sci Technol. 2014;69(11):2331-8. doi: 10.2166/wst.2014.154.

DOI:10.2166/wst.2014.154

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.

摘要

构建了半饱和规模的菖蒲人工湿地来处理城市雨水。该设计包括预处理的沉淀池和配备再循环装置的垂直流火山砾石湿地床。2012 年监测了 18 次降雨事件。在水力停留时间为 3 天时，该处理系统对悬浮物、有机物、氮和磷的总去除效率分别为 99.4%、81%、50%和 86%，对铜、锌和铅的去除效率分别为 29%、68%和 25%。在湿地床中，再循环提高了氨、总氮和锌的去除率。植物吸收提供了 18%的氮去除和 39%的磷去除。在实验阶段，由于堵塞，基质中只有 1.4%的孔隙体积减少，这意味着湿地可以在很长一段时间内不堵塞地运行。