What is a Lamella Settling System?
Lamella settling systems are specially designed settling units equipped with thin and inclined plates. These systems separate suspended solids in wastewater through the effect of gravity. Thanks to the inclined plate structure, the water flow slows down and particles slide off the plate surface and accumulate at the bottom.
Lamella systems are much more compact compared to traditional settling tanks. In addition, they provide 8-12 m² of effective settling surface in an area of 1 m². Therefore, 80% less space is used for the same treatment capacity.
As a result, lamella settling systems are an indispensable part of modern treatment plants with high efficiency, low energy consumption, and compact design. They are widely used, especially in the industrial wastewater treatment and biological treatment systems during the pre-settling stage.
Technical Specifications
- Plate Angle: 55°-60° optimum slope (ensures particle sliding)
- Plate Distance: 50-100 mm interval (for hydraulic load)
- Material: Carbon steel (epoxy coated) or 304/316 stainless steel
- Effective Surface: 8-12 m² settling area for 1 m² base
- Loading Rate: 0.5-1.5 m³/m²·hour hydraulic load
- AKM Removal: >90% suspended solid removal
- Sludge Collection: Conical bottom, automatic sludge discharge
- Capacity: Custom design in the range of 10 - 5,000 m³/hour
Application Areas
- Municipal Wastewater Treatment Facilities: Primary and final sedimentation
- Drinking Water Treatment: Sedimentation after coagulation
- Industrial Wastewater: After chemical treatment
- Food and Dairy: Oil and solids separation
- Textile Industry: Dye and finishing sedimentation
- Metal Coating: Heavy metal hydroxide sedimentation
- Mining and Ore: Ore enrichment facilities
- Pulp and Paper Industry: Cellulose fiber and filler
How Does Lamella Work?
In the lamella settling system, wastewater is directed to the inlet chamber. Additionally, the inflow rate is reduced to prevent turbulence. Then, water flows upward between the inclined plates.
Particles begin to accumulate on the surface of the plates due to the effect of gravity. Consequently, this accumulation slides down thanks to the plate inclination and collects in the sludge collection area. The clear water that rises is discharged from the outlet at the top.
As a result, the settling distance of the particles is only as much as the distance between two plates. This significantly reduces the settling time and increases efficiency. It provides high treatment performance, especially in wastewater that has been coagulated with fine particles and flocculants.
Advantages of Lamella System
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Detailed InformationFrequently Asked Questions
Yes, lamella systems are 5-10 times more efficient than conventional sedimentation tanks. The inclined plates significantly increase the effective sedimentation surface area. For the same treatment capacity, 80% less space is used.
This angle range is the optimum slope that allows particles to slide off the plate surface and collect at the bottom. At lower angles, particles adhere to the plate, while at higher angles, the sedimentation efficiency decreases. 55°-60° is the most ideal balance point.
Material selection is made according to the characteristics of the wastewater. For general uses, epoxy-coated carbon steel is preferred. For corrosive wastewaters, 304 or 316 stainless steel is used. In some special applications, plastics such as PP and PE may also be preferred.
Lamella systems are commonly used in industrial wastewater treatment after coagulation-flocculation, prior to biological treatment, and in drinking water preparation facilities. They are also preferred in sectors such as mining, food, and metal plating.
Lamella systems require minimal maintenance. Periodic cleaning of the plate surfaces and inspection of the sludge collection area is sufficient. Thanks to the modular plate design, individual cleaning or replacement can be easily performed. A general inspection once or twice a year is adequate.
The modular structure of lamella systems allows for easy capacity increase. Capacity can be increased by 2-3 times by adding additional plate modules to the existing tank or by establishing parallel units. This feature offers a significant advantage in adapting to sectoral growth.