Removal of Nutrients, Sediment, and Heavy Metals by a Stormwater Treatment Train; a Medium-Density Residential Case Study in Southeast Queensland
| Autor: | Andy Hornbuckle, Darren Drapper |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Pollution
lcsh:Hydraulic engineering 010504 meteorology & atmospheric sciences media_common.quotation_subject Geography Planning and Development Stormwater chemistry.chemical_element stormwater 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry nitrogen Rainwater harvesting lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 phosphorus heavy metals gross pollutant generation rates 0105 earth and related environmental sciences Water Science and Technology media_common Total suspended solids Pollutant Hydrology Suspended solids lcsh:TD201-500 Phosphorus monitoring chemistry Environmental science suspended solids Surface runoff |
| Zdroj: | Water, Vol 10, Iss 10, p 1307 (2018) |
| ISSN: | 2073-4441 |
| Popis: | Urban stormwater runoff from a medium-density residential development in southeast Queensland has been monitored in the field since November 2013. A treatment train installed on the site includes rainwater tanks collecting roofwater, 200-micron mesh baskets installed in grated gully pits, and two 850-mm-high media filtration cartridges installed in an underground 4-m3 vault. The site has been monitored over a 4.5-year period. Removal efficiencies were observed at this site for the regulated pollutants; the corresponding values for total suspended solids (TSS), total phosphorus (TP), and total nitrogen (TN) for the pit baskets were 61%, 28%, and 45%, respectively. The cartridge filters removed 78% of TSS, 59% of TP, 42% of TN, 40% of total copper, and 51% of total zinc. As the measured influent TSS and TP concentrations to the cartridge filters were low when compared to industry guidelines, the U.S. field dataset was truncated to anticipated guideline levels, confirming results at 90% for TSS and 76% for TP. The total gross pollutant generation rate from the medium-density residential catchment was observed to be 0.24 m3/Ha/year, with a corresponding air-dried mass of 142.5 kg/Ha/year. Less than 2% of the gross pollutant mass was anthropogenic. This paper concludes that the treatment train, and in particular the media filter, provides good removal of total copper and total zinc as well as TSS, TP, and TN from urban stormwater runoff, with higher inlet concentrations producing better performance. Field test data from 58 months of operation and standard maintenance suggests that breakthrough of TSS and TP has not occurred yet. |
| Databáze: | OpenAIRE |
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