Design and Performance Characterization of Roadside Bioretention Systems

Rajendra Prasad Singh, Fei Zhao, Qian Ji, Jothivel Saravanan and Dafang Fu
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Rajendra Prasad Singh: School of Civil Engineering, Southeast University, Nanjing 211189, China
Fei Zhao: School of Civil Engineering, Southeast University, Nanjing 211189, China
Qian Ji: School of Civil Engineering, Southeast University, Nanjing 211189, China
Jothivel Saravanan: School of Civil Engineering, Southeast University, Nanjing 211189, China
Dafang Fu: School of Civil Engineering, Southeast University, Nanjing 211189, China

Sustainability, 2019, vol. 11, issue 7, 1-13

Abstract: In the current study, three roadside bioretention systems with different configurations were constructed to investigate their pollutant removal efficiency in different rainfall recurrence intervals. The bioretention systems (referred as units) (unit A: 700 mm height material without submerged zone; unit B: 400 mm height material with 300 mm submerged zone; unit C: 400 mm height material without submerged zone) were used to conduct the rainfall events with uniform 120 min rainfall duration for 2-, 5-, 10-, 15-, and 30-year recurrence intervals. Results reveal that the gradual increase of rainfall return period would have negative effects on TN and NH 4 + -N removal. The higher filler layer may increase pollutant removal efficiency. Setting a submerged zone could improve the COD Mn and TN removal compared to TP and NH 4 + -N removal. The values for comprehensive reduction rate of pollutant load in the three bioretention systems were recorded as follows: 64% in SS, 50%~80% in TP, 69% in NH 4 + -N, and 28%~53% in NO 3 -N separately. These results provide greater understanding of the design and treatment performance of bioretention systems.

Keywords: bioretention; pollutant removal; urban road runoff; stormwater management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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