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 19):126-130.
Removal Efficiency of Fecal Coliforms in Stormwater Runoff by Bioretention System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
19 19
Page:
126-130
Column:
Date of publication:
2021-10-01
- Keywords:
- bioretention system; fecal coliform; rainfall intensity; rainfall interval; runoff reduction
- 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.
Last Update:
2021-10-01