ZHANG Yu-juan,DOU Yue-qin,ZHANG Xue-sheng,et al.Removal Efficiency of Fecal Coliforms in Stormwater Runoff by Bioretention System[J].China Water & Wastewater,2021,37(19):126-130.
生物滞留系统对雨水径流中粪大肠菌群的去除效果
- Title:
- Removal Efficiency of Fecal Coliforms in Stormwater Runoff by Bioretention System
- Keywords:
- bioretention system; fecal coliform; rainfall intensity; rainfall interval; runoff reduction
- 摘要:
- 粪大肠菌群是雨水径流中的典型病原微生物，为此，构建了3种不同基质的柱形生物滞留系统，研究系统对雨水径流中粪大肠菌群的去除效果。结果表明，在4种降雨强度下，生物滞留系统对粪大肠菌群的去除率在65.3%～95.4%之间，随着降雨强度的增加，对粪大肠菌群的去除率呈不同程度的降低。另外，随着降雨间隔时间的增加，系统对粪大肠菌群的去除率上升，间隔5～10 d时去除率趋于稳定。雨水径流削减率模拟结果显示，砂-炭生物滞留系统在强降雨时对径流的削减率最大。综合各系统去除粪大肠菌群和削减径流的能力，认为砂-炭生物滞留系统更适用于易发生雨水内涝的城市。
- Abstract:
- Fecal coliforms are typical pathogenic microorganism in rainwater runoff. Therefore, three columnar bioretention systems with different media were constructed to investigate the removal performances of the fecal coliforms in the rainwater runoff. The removal efficiency of fecal coliforms was between 65.3% and 95.4% under four rainfall intensities, and the removal efficiency of the fecal coliforms decreased in different degrees with the increasing rainfall intensity. In addition, with the increase of the rainfall interval time, the removal efficiency of the fecal coliforms by the system increased, and tended to be stable when the interval was 5 to 10 days. The simulation of the runoff discharge rate showed that the discharge rate of the sand/carbon bioretention system was the largest in heavy rainfall. Considering the ability of each system to remove the fecal coliforms and reduce the runoff, it is concluded that the sand/carbon bioretention system is more suitable for the city prone to waterlogging.
相似文献/References:
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