What is a Tube Settler?
Tube settler is a high-rate sedimentation tank that comprises of several tubes or plates together which works as mini sedimentation tanks to decrease the detention time.
It is a technology that achieves a detention time of less than 15 minutes, while a conventional plain sedimentation tank has a much higher detention time of 1-2 hours.
They can be made of a variety of shapes and sizes that can be circular, square, hexagonal, or plate type. Modular self-fitting pieces have also been used nowadays for easy assembly and removal.
Advantages of Tube Settler
- Faster detention time (less than 15 minutes)
- High-cost savings (due to smaller sizes plants)
- Used in water treatment (discrete and flocculent settling) and wastewater treatment.
- High efficiency in turbidity removal (up to 90% )
- Modification of existing sedimentation tank with tube settler to better perform/ increase capacity
- Available in prefabricated modular setups
History of Tube Settler
- The idea originated by Hazen in 1904
- Camp explored it in 1946
- Hansen and Culp designed it using tubes in 1967
- Hernandez and Wright (1970), Yao (1973), Willis (1978), and Fadel (1985) proposed different models for design
- Several studies are ongoing to improve the design and efficiency of tube settlers
Design of Tube Settler
The commonly used design for tube settler is the design given by Yao (1973) and the design sheet is based on it for discrete settling (Type I). The tube settler works well for plain sedimentation as well as for sedimentation with coagulation.
Design Tube Settler (lamella) with Interactive Excel Sheet
- Choose the Tube settler (Circular or Square tube) or plate type
- Choose the Diameter/width of the settler
- Get, the design Output (as simple as that)
NOTES: Other general values are provided (for Beginners). Enter in green for a known person to get a customized design and dimensions of the tube settler and the tank dimensions.
Easy online design sheet of Tube/Plate settler (Refresh Page to get Original values)
*Note: The author is not responsible for the professional or any use of this design sheet.
Good Materials to Read on Tube Settler (For Further Study)
- Original Paper by K.M.Yao (Document LINK)
- Tube Settler Model (Fadel and Baumann) (Document LINK)
- Operating Condition Settler Statistical Analysis (Document LINK)
Rakesh Shah (Civil and Environmental Engineer)
Author
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