文档介绍：, 环境工程技术学报第12卷，第3期
May, 2022 at the bioretention
had high removal efficiencies on COD, SS, NH3-N and TP, and the effluent water quality reached Class HI standard
of Environmental Quality Standards far Surface Water (GB 3838-2002). Especially for COD and SS, the average
removal rates reached % and %, respectively. Grass swale had a good removal effect on NH3-N, with an
average removal rate of %. However, TP concentration of effluent was higher than that of influent. The
permeable brick pavement released NH3-N, causing an increase of its concentration in the effluent. Comparing the
three types of permeable pavements, the pollutant removal ability of the permeable concrete was the best
comprehensively, and its average removal rates of COD, NH3-N, TP and SS were %, %, %, and %,
respectively. According to the monitoring results and literature reports comprehensively, it was found that
bioretention and permeable concrete pavement had higher pollutant removal effects, and grass swale had outstanding
performance in removing NH3-N from rainwater. In the practical application of rainwater projects, appropriate
measurement should be selected according to control objectives, costs and pollutant removal efficiency.
Key words bioretention; grass swales