Hydrodynamic Separators

The JDS offers a unique non-blocking and non-mechanical screening process with no moving parts and no power requirements.

1. Stormwater enters the JDS unit from one or more inlet pipes, a grated drop or curb inlet.
2. Incoming water collects in the fore bay of the inlet trough.
3. Waters enter the separation and screening cylinder through the volute entrance in the diversion weir wall.
4. Water entering the separation cylinder forms a spinning vortex, capturing all floatables and swirl concentrating suspended solids to the center of the separation chamber.
5. The vortex flow pattern produces a washing force across the screen face, preventing it from becoming blocked, while allowing stormwater to pass through the screen and flow beneath the oil baffle.
6. Oils, greases and other Total Petroleum Hydrocarbons (TPHs) are trapped within the integral oil baffle attached beneath the inlet bay.
7. Settled and swirl concentrated suspended solids are captured in the sump which is typically cleaned out by a vactor truck.
8. Flows larger than the JDS unit’s design treatment flow bypass over the diversion weir. Bypass flows do not scour out previously captured pollutants.