A platform for research: civil engineering, architecture and urbanism
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Design aspects and plant species affect pollutant removal in Southern California stormwater biofilters
We conducted a column study to better understand the relative effects of plants, design elements, and operating conditions on pollutant removal in stormwater biofilters in southern California under local conditions. We planted five southern California native species (Baccharis pilularis, Carex praegracilis, Juncus patens, Leymus condensatus, and Muhlenbergia rigens) in experimental biofilter columns fitted with a saturated zone and evaluated pollutant removal during weekly dosing and following a 52-day dry period. Columns planted with C. praegracilis and J. patens were also evaluated under conditions of fortnightly dosing and without the presence of a saturated zone. During weekly dosing, planted columns had a total nitrogen removal efficiency of 46% on average whereas removal was 8% in unplanted columns. B. pilularis and M. rigens performed better than other species at nitrogen removal. The presence of a saturated zone improved nitrogen removal and metal removal, but only before the 52-day dry period. With a few exceptions, local best management practice effluent concentrations limits were exceeded but performed similarly to existing southern California biofilters. Nitrogen removal decreased slightly under a fortnightly dosing frequency, which better represented rainfall event frequency in Los Angeles when compared to weekly dosing. Highlights Nitrogen removal was better than previous studies following a 52-day dry period.; Effluent did not meet local benchmarks but was comparable to existing local biofilters.; Species traits did not correlate to pollutant removal as in previous studies.; Dosing frequencies closer to local rain patterns reduced nitrogen removal slightly.; Presence of a saturated zone improved nitrogen removal.;
Design aspects and plant species affect pollutant removal in Southern California stormwater biofilters
We conducted a column study to better understand the relative effects of plants, design elements, and operating conditions on pollutant removal in stormwater biofilters in southern California under local conditions. We planted five southern California native species (Baccharis pilularis, Carex praegracilis, Juncus patens, Leymus condensatus, and Muhlenbergia rigens) in experimental biofilter columns fitted with a saturated zone and evaluated pollutant removal during weekly dosing and following a 52-day dry period. Columns planted with C. praegracilis and J. patens were also evaluated under conditions of fortnightly dosing and without the presence of a saturated zone. During weekly dosing, planted columns had a total nitrogen removal efficiency of 46% on average whereas removal was 8% in unplanted columns. B. pilularis and M. rigens performed better than other species at nitrogen removal. The presence of a saturated zone improved nitrogen removal and metal removal, but only before the 52-day dry period. With a few exceptions, local best management practice effluent concentrations limits were exceeded but performed similarly to existing southern California biofilters. Nitrogen removal decreased slightly under a fortnightly dosing frequency, which better represented rainfall event frequency in Los Angeles when compared to weekly dosing. Highlights Nitrogen removal was better than previous studies following a 52-day dry period.; Effluent did not meet local benchmarks but was comparable to existing local biofilters.; Species traits did not correlate to pollutant removal as in previous studies.; Dosing frequencies closer to local rain patterns reduced nitrogen removal slightly.; Presence of a saturated zone improved nitrogen removal.;
Design aspects and plant species affect pollutant removal in Southern California stormwater biofilters
B. K. Winfrey (author) / M. Ho (author) / W. Wang (author) / Y-J Li (author) / R. F. Ambrose (author)
2020
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Which species? A decision-support tool to guide plant selection in stormwater biofilters
| British Library Online Contents | 2018
Which species? A decision-support tool to guide plant selection in stormwater biofilters
| British Library Online Contents | 2018
Which species? A decision-support tool to guide plant selection in stormwater biofilters
| British Library Online Contents | 2018
Which species? A decision-support tool to guide plant selection in stormwater biofilters
| British Library Online Contents | 2018
Which species? A decision-support tool to guide plant selection in stormwater biofilters
| British Library Online Contents | 2018