In general 6,000ppm is a lot ...
Published by Karl-Uwe Schmitz, President at Aqua Equip Technologies LLC (AET LLC)
In general 6,000ppm is a lot but it depends on the application, particle sizes, density and shapes. In municipal applications we use tube settlers usually for up to 500ppm but in industrial applications it can be much higher. The removal efficiency depends on many factors especially on the settling velocity of the particles, flow rate/ retention time in the tube settler basin, eventually flocculation and others. You can find some more information on how tube settlers are designed here on the Water Network: HERE
If you can give us some more information on the application we can give you a recommendation. Please send further information to info@aqua-equip.com