文档介绍：Pollutants removal from first flush by filtration
through four filter media
Junling Wang, Yajun Zhang, Junqi Li, Cuimin Feng, Huizhen Wang
School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing100044,
China
Abstract- The effect of pollutants removal from first flush by filter media. Whether the filter media is applicable or not is
filtration through four filter media was investigated by relative to material quality, market, production scale, price
measuring turbidity, SS, COD, TP and TN. The four filter and life, as well as easy maintenance. This paper carried
media were selected from familiar and available materials, out experimental study on several filter media in the
including slag, geotextile, and . treatment of first flush with the purpose of finding out the
Experiments were conducted in an elaborate channel with best filter media for pollutants removal.
raw water obtained by mixing tap water with some sludge to
simulate the quality of early rainwater runoff. Results TABLE 1. AVERAGE CONCENTRATION OF POLLUTANTS IN
showed that 30cm-thick slag was the most effective filter
media, and its removal rates for turbidity, SS, COD, TN and RUNOFF IN BEIJING CITY[1]
TP was up to %,%,% ,% and %
COD( SS TP TN
respectively. As for pollutants removal rate, the order