Tube settlers
Effluent Troughs, Weirs and Baffle Walls
Settled sludge, as well as clearwater, must be continuously removed from the clarifier tank. For sludge removal, different systems are available — sludge agitators in combination with an inclined tank bottom, flushing mechanisms, and rotary or chain scraper systems.
Depending on the individual customer’s situation, AET offers support for selecting the right sludge removal system.
Generally, effluent launders are designed as perforated pipes or rectangular channels with an overflow weir. The design must go hand in hand with the design of the lamella plate settlers. An incorrect design can result in a hydraulic overload of the effluent launders or in short circuit flows through the lamellas. Moreover, both of these issues can significantly affect the clarifier system’s performance. One important factor for avoiding these risks is correct alignment of the effluent launders to the inclined water level of the clarifier tank. This can be solved by using adjustable weirs.
AET provides consulting and product systems for sludge removal and effluent launders in several variations along with a range of materials such as stainless steel, PVC, or RFP. Please contact us today for more information.
- Equidistant channels provide maximum surface area
- Polypropylene material extends product lifetime
- Higher material thickness provides high product stability (walkable design)
- Tongue and groove system allow easy onsite assembly
- Large channel opening size reduces the risk of clogging
Articles & Literature
All tube settler design guidelines, including those from the 10 state standards, emphasize the importance of uniform water flow throughout the settling basin and through the tube settlers. To ensure uniform flow, it’s critical that water is discharged evenly from the tube settler settling tank. Achieving this requires careful design of the effluent troughs and overflow weirs.
The troughs must have adequate volume, and their spacing, as well as their distance from the top of the tube settlers, are crucial factors. Additionally, the leveling and dimensions of overflow V-notches are essential for the effective operation of the tube settler system.
To address these design needs, AET offers CFD simulation services and provides custom designs and construction of effluent systems.