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Vortex Grit Removal


  • Separation efficiency of 95% removal up to 105microns

  • Up to 50 MGD in a single unit

  • Up t 20ft in Diameter



The SEDIVORTEX grit removal system consists of a group of mixing blades with adjustable inclination that turning create a vortex that promotes the sedimentation of sands (even extremely fine grain sizes). The sands are extracted settled by a pneumatic (airlift), or by a grit pump positioned outside of the hopper. 


From the vortex the grit is further concentrated by a

  • Sedicyclone: hydrocyclone

  • Sedigrit Grit Classifier

  • Sediwash: Grit Washer

The Sedigrit and Sediwash are systems equipped with screw conveyor to discharge the grit into a bin.

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The wastewater enters and exits the vortex in either a 270 degree or 360 degree configuration. The configuration is largely a matter of plant hydraulic as the travel path residence time of the flow through the vortex is the main driver if grit removal efficiency.


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The sedimentation effect is primarily determined by the design of the vortex chamber and the flow trajectory of the wastewater. 


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An inlet ramp is used to feed the vortex from the bottom to induce sedimentation and a baffle system is used to force the flow path and prevent the wastewater to short-circuit the vortex and go directly to the outlet.


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The Rotor is designed with an optimal angle and spins continuously at a low speed to ensure the flow of the vortex

The Lower chamber is equipped with a cover plate with a 3” Gap to allow the grit sedimented on the conical chamber to drop into the lower chamber to enhance the flow trajectory.


The SEDIVORTEX is traditionally installed in a circular concrete tank but may also be installed in a stainless steel tank



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The performance of the Sedivortex

is validated by a Computational Fluid dynamic model.

With use of the baffle we can reach 95% efficiency for particles over 105 microns.

Our centrifuges were designed with ease of maintenance in mind.  It is one of our greatest strengths. 

Bull Gear

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The Vortex rotor blade is driven by a bull gear drive rotating 24 hours per day. The Bull gear features a fully contoured raceway hardened to a minimum 58-60 Rc

Grit Extraction and Scouring

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The Grit Extraction and Scour line runs through a 10" Central Pipe.  

Grit Pump

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The Grit can be extracted by airlift or pump. Most Typically a Grit Pump is requested. Our standard is a Gorman Rupp Self-Priming or Prime Assist Grit Pump

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