Tube settlers and parallel plates increase the settling capacity of circular clarifiers and/or rectangular sedimentation basins by reducing the vertical distance a floc particle must settle before agglomerating to form larger particles.

 

Tube settlers use multiple tubular channels sloped at an angle of 60° and adjacent to each other, which combine to form an increased effective settling area. This provides for a particle settling depth that is significantly less than the settling depth of a conventional clarifier, reducing settling time

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Tube settlers capture the settle able fine floc that escapes the clarification zone beneath the tube settlers and allows the larger floc to travel to the tank bottom in a more settle able form. The tube settler’s channel collects solids into a compact mass which promotes the solids to slide down the tube channel.

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Why Tube Settlers

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Tube settlers offer an inexpensive method of upgrading existing water treatment plant clarifiers and sedimentation basins to improve performance. They can also reduce the tankage/footprint required in new installations or improve the performance of existing settling basins by reducing the solids loading on downstream filters.

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Made of lightweight PVC, tube settlers can be easily supported with minimal structures that often incorporate the effluent trough supports. They are available in a variety of module sizes and tube lengths to fit any tank geometry, with custom design and engineering offered by the manufacturer.

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Advantages of Tube Settlers

The advantages of tube settlers can be applied to new or existing clarifiers/basins of any size:

• Clarifiers/basins equipped with tube settlers can operate at 2 to 4 times the normal rate of clarifiers/basins without tube settlers.

• 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 electricity.

• New installations using tube settlers can be designed smaller because of increased flow capability.

• 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.