PERMEABILITY CHARACTERISTICS TEST ON WASTEWATER IN UNPLANTED BIORETENTION CELL UNDER CONTINUOUS OPERATION

WANG Yajun; CHEN Tianjing; LI Jinshou

doi:10.13205/j.hjgc.202201005

Volume 40 Issue 1

Mar. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(1): 27-31,51

WANG Yajun, CHEN Tianjing, LI Jinshou. PERMEABILITY CHARACTERISTICS TEST ON WASTEWATER IN UNPLANTED BIORETENTION CELL UNDER CONTINUOUS OPERATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 27-31,51. doi: 10.13205/j.hjgc.202201005

Citation:

WANG Yajun, CHEN Tianjing, LI Jinshou. PERMEABILITY CHARACTERISTICS TEST ON WASTEWATER IN UNPLANTED BIORETENTION CELL UNDER CONTINUOUS OPERATION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 27-31,51. doi: 10.13205/j.hjgc.202201005

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PERMEABILITY CHARACTERISTICS TEST ON WASTEWATER IN UNPLANTED BIORETENTION CELL UNDER CONTINUOUS OPERATION

doi: 10.13205/j.hjgc.202201005

School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Received Date: 2021-01-11
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

To explore the permeability of the bioretention cell during sewage treatment under continuous operation, the system performance was investigated by monitoring the changes of the permeability coefficient and porosity under different hydraulic load conditions. The results showed that under the same hydraulic load, the standard permeability coefficient, K₂₀ showed a trend of first decreasing, then increasing, and finally reaching a stable stage(on about the 15 th day). The greater the hydraulic load, the greater its impact on the relative permeability coefficient. The relationship between two parameters reached a significant negative correlation level(P<0.01). Under the condition of low hydraulic load [less than 1.0 m³/(m²·d)], the permeability coefficient was positively correlated with porosity. Under the condition of higher hydraulic load [more than 2.0 m³/(m²·d)], the permeability coefficient and porosity had no significant correlation. The hydraulic load of the BRC should be controlled lower than 2.0 m³/(m²·d), when the sewage was processed under continuous operation, and the system performance was best when the hydraulic load was 1.0 m³/(m²·d). This study could provide theoretical guidance for effectively preventing BRC clogging.
- bioretention cell,
- clogging,
- hydraulic loading,
- permeability coefficient,
- porosity

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References

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