How it Works
Stormwater is introduced tangentially through the inlet
chute and spirals around the vertical axis. Oil and floatables
rise to the surface and are prevented from escaping as low
energy vortex motion directs sediment toward the center and
base of the vessel.
The outlet chute is positioned to discharge treated stormwater
in a direction opposite to the circulating flow allowing
solids to be swept past the outlet resulting in high removal
and retention efficiencies.
An integral bypass eliminates the need for an additional
structure. Higher flows bypass the treatment chamber where
a stable flow regime is maintained, preventing the re-entrainment
of stored pollutants.
The floatables draw-off port diverts floatables to the treatment
chamber prior to bypass.
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