How Vortex Grit Remover works

A well-designed grit remover must be more than just a settling tank, since it must separate organic putrescible matter from the grit over a range of flows.

A commonly used design is based on grit particles with a specific gravity of 2.65 at a temperature of 60°F. By maintaining proper velocities in the grit remover, the grit separates, since it has a higher specific gravity than the organic matter.

It should be noted that since the settling rates of these materials can be quite similar, complete separation of the grit from the organic matter is difficult. The Vortex* Grit Remover is, however, designed to approach complete grit separation when properly operated.

Main Features of the Vortex* Grit Remover

• Variable Hydraulic Loading - To optimize the process under variable flow conditions, constant velocity is maintained within the separation tank utilizing the variable speed drive.
• No Short Circuiting - The inlet is 270 degrees away from the effluent weir. The basin geometry provides optimum vortex performance, eliminating dead spots.
• Maximum Operating Control - The circulator speed can be changed to obtain the optimum separation of grit and organic matter to meet the specific requirements of each treatment plant.
• Minimum Headloss - Because an overflow weir is not required, a major source of headloss in the grit remover is eliminated. This results in better plant hydraulics and reduced pumping costs.