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Application Grit and oil removal from municipal and industrial waste water.
Characteristics The system is made up of a turbine and an air-lift.
Operation The water to be treated goes through the grit removal system with a tangential flow; the grit which sediments on the bottom is lifted by an air-lift.
Materials Compact equipment in hot dip galvanized carbon steel or stainless steel.
Installation In a concrete channel.
Tank diameter From 1000 to 5000 mm.
Separation Grit particles larger than 200 microns.
Advantages The grit moved by the turbine is partially separated from the organic substances.
Disadvantages Limited capacity of treatment.
It does not include any oil removal system.
Optional Blower



The water flows into the grit removal tank in a tangential way and the blades keep the liquid in motion at any level of flow rate. The tangential flow and the blades rotation make the grit particles sediment on the bottom. 
The grit is lifted by an air-lift and is conveyed to a mechanical separator or to a simple draining and filtering bed.
The grit removed is clean enough thanks to the separation of the organic substances due to the effect of the rotary blades.

Sometimes, to avoid the arising of decomposition phenomena due to the inevitable presence of organic material, a certain number of washings by water or air are necessary before extracting the grit.

This type of grit removal system does not separate any oily substances.


1.1 Waste water delivery to the grit removal system :m³/h (*)
1.2 Useful diameter :mm.  
1.3 Water and sand flow rate in the air-lift :m³/h (*)
1.4 Air-lift size :DN.  
1.5 Rotation speed :rpm 30
(*) to be advised when asking for a quotation