Tube Settler

Tube settler in wastewater treatment is an additional unit or equipment used to improve the sedimentation process in wastewater.

Basic Concept

The tube settler consists of a collection of pipes or plates in an inclined shape (usually 60 °) placed above the sedimentation basin. Incoming wastewater will pass through these pipes / plates, so that solid particles settle faster because the distance to be traveled is shorter.

Main Functions

1. Increase sedimentation efficiency - accelerates the process of separating suspended solids (SS) from water.

2. Reduce sedimentation basin area - with tube settler, the basin size can be smaller but still able to accommodate large discharge.

3. Improve effluent quality - the water out of this unit becomes clearer because more solids are deposited.

Working Principle

• Wastewater enters the sedimentation unit.

• When passing through the tube settler area, solid particles will stick / interact with the pipe wall / inclined plate.

• Gravity helps the particles fall to the bottom, while the cleaner water exits to the next stage.

Pros

• Compact design and space saving.

• Relatively low operating costs.

• Suitable for both domestic and industrial wastewater treatment plants.

Disadvantages

• Requires regular cleaning to prevent clogging by sludge.

• Decreased effectiveness if water discharge fluctuates greatly or SS load is too high.