Lee B C, Matsui S, Shimizu Y, Matsuda T, Tanaka Y
Graduate School of Global Environmental Studies, Kyoto University, Sakyo-Ku, Yoshida-Honmachi, Kyoto 606-8501, Japan.
Water Sci Technol. 2005;52(12):225-32.
We installed a new device on a paved road to treat runoff from a roadway surface. All the stormwater runoff was transferred into the device and the runoff equivalent to 10 mm/hr or less was treated. The treatment method consists of sedimentation and up-flow filtration with porous polypropylene (PPL) processes. The treated runoff was discharged into the existing storm drainage pipe. The average removal efficiency of the initial runoff at the beginning of rainfall which has high pollution intensity was about 90% for SS, about 70% for COD, about 40% for total phosphorus (T-P), about 80% for Pb and Cd, about 70% for Zn, Cu, Mn and Cr, and about 60% for polycyclic aromatic hydrocarbons (PAHs). The overall removal efficiencies of the experiment that ran for four months remained > 60% of SS, > 40% of COD, > 60% of heavy metals, and > 40% of PAHs. The PPL is excellent for removing smaller size particulates of suspended solids, which originate basically from diesel exhaust, as well as larger size particulates from automobile tires, asphalt roads, and other accumulated source(s) of clay and sand, etc.
我们在一条铺砌好的道路上安装了一台新设备，用于处理路面径流。所有雨水径流都被输送到该设备中，流量相当于每小时10毫米及以下的径流得到了处理。处理方法包括沉淀以及采用多孔聚丙烯（PPL）工艺的上流式过滤。经处理的径流排入现有的雨水排水管道。降雨开始时具有高污染强度的初期径流的平均去除效率为：悬浮物（SS）约90%，化学需氧量（COD）约70%，总磷（T-P）约40%，铅（Pb）和镉（Cd）约80%，锌（Zn）、铜（Cu）、锰（Mn）和铬（Cr）约70%，多环芳烃（PAHs）约60%。持续四个月的实验中，悬浮物的总体去除效率保持在60%以上，化学需氧量保持在40%以上，重金属保持在60%以上，多环芳烃保持在40%以上。PPL对于去除悬浮固体中较小尺寸的颗粒非常有效，这些颗粒主要源自柴油尾气，以及来自汽车轮胎、柏油路和其他粘土、沙子等累积源的较大尺寸颗粒。
