• Separation of grit from liquid flows with additional organics washing
  • Receives settle-able grit in liquids from upstream process
  • Solids settle in inlet hopper by gravity and vortex movement created by rotating agitator
  • Organic material is removed by vortex movement in the inlet hopper
  • Inclined shaft-less or shafted screw transports settled grit to discharge end
  • Grit dewaters by gravity in the transport zone
  • Dry grit is discharged vertically into receiver bin or conveyor
  • Trough wear protected by metal or HDPE liner

Technical specifications:

Material 304ss, 316ss
Screw 304ss, 316ss, micro alloy steel
Trough protection 304ss, 316ss wear bars
Screw diameter 240 – 280mm
Screw type shaft-less or shafted
Transport length 4210 – 5260mm
Inclination 40 deg
Discharge height 2300 – 3000 from ground level
Flow rate  30 – 90 m3/h wet solids 2 – 5% DS
Grit separation 95%  of particles >200 micron
Organics removal 95% with additional washing
Grit extraction 2000 kg/h at 90% DS
Discharge height 2250 – 2980mm


  • Grit removal from liquids flow after upstream screening process
  • Typically used with upstream vortex grit removal system in municipal sewerage works