Post-treatment schemes of the outflow from hydrocyclone treating paved-road stormwater runoff

Abstract Results of water quality analysis indicated that the outflow from a hydrocyclone treating road runoff still requires further treatment before discharging into receiving waters. Hence, several treatment designs were presented for the post-treatment of the hydrocyclone outflow (including pollutant-concentrated underflow and pollutant-separated overflow). The design criteria were based on some of the main affecting factors, such as treatment level, land availability, and construction cost. With respect to the determination of the treatment goal, the primary consideration should lie on the water quality requirement. The treatment should normally include both underflow and overflow depending on the required discharged water quality. In terms of the treatment method selection, land availability and construction cost should be considered first in the design. In order to achieve the most appropriate treatment, the design process should be based on the overall analysis of the affecting factors and local c...

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