基于雨水口功能复合的初期雨水截污过滤技术研究

Research on Initial Rainwater Interception Filter Technology Based on Function Combination of Rainwater Inlet

摘要:

针对绿色基础设施在高密度既有城区实施困难的问题，利用现状排水系统分布广泛的雨水口设施，开展雨水口内截污过滤技术研究。结果表明：由活性炭、石英砂、陶粒按照特殊比例组成合成介质过滤后的水样粒度分布较为集中，整体粒度不超过66.9 μm，大粒度颗粒物已被拦截；连续过滤试验期间，合成介质对SS的去除率达到70%及以上，且无溢流现象发生，从源头削减了初期雨水进入管网及河道的污染负荷。

Abstract:

Aiming at the implementation difficulties of green infrastructure in the existing high-density urban areas, the rainwater inlet facilities widely distributed in the current drainage system are utilized to carry out the research on the sewage interception filter technology in the rainwater inlet. The results show that the particle size distribution of the water samples filtered by the synthetic medium composed of activated carbon, quartz sand and ceramisite according to the special proportion is relatively concentrated. The overall particle size does not exceed 66.9 μm, and the large particulate matters have been intercepted. The SS removal rate of synthetic medium reaches 70% or more during the continuous filtering test without overflow phenomenon, which reduces the pollution load of the initial rainwater entering the pipe network and river channel from the source.