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Abstract
The weighted average concentration (WAC) of total suspended solids (TSS) in stormwater effluent from a continuous deflective separation (CDS) unit in Port Jackson (Australia) catchment was reduced by an average 28% during six high-flow events, but some TSS was released during turbulent, high-flow events. The average removal efficiency of metals Cr, Cu, Pb Mn, Ni, Zn and Fe varied considerably (−49% for Pb and +10% for Mn), whereas Ni and Zn were inefficiently removed by the device. Average concentrations of TKN, NOx and TP were similar at both in- and out-flow points and faecal coliforms counts were slightly reduced.
Acknowledgements
The project was funded by Drummoyne Council, the New South Wales Environment Protection Authority (NSW EPA) and the Stormwater Trust. Staff from these organisations who assisted the project are gratefully acknowledged. The useful comments by the two anonymous reviewers are greatly appreciated.