Tube settlers use multiple tubular PVC channels at an angle of 60°, adjacent to each other, combined together
to form a tube deck, for an increased effective settling area.
The flocculated water enters the tube deck from the bottom and flows upward between them. As the water moves
upwards, solids settle onto the surface area provided by the tube surface. Heavy Solids continue to slide down
the tube surfaces to the collection hopper.
Raw Water Treatment
Primary Effluent Treatment
Advantages of Tube Settlers
The advantages of tube settlers can be applied to new or existing clarifiers/basins of any size:
It is possible to cut coagulant dosage by up to half while maintaining a lower influent turbidity to the
treatment plant filters.
Less filter backwashing equates to significant operating cost savings for both water and
New installations using tube settlers can be designed smaller because of increased flow
Flow of existing water treatment plants can be increased through the addition of tube settlers.
Tube settlers increase allowable flow capacity by expanding settling capacity and increasing the solids
removal rate in settling tanks.