Overview
The CG Lamella Plate Clarifier™ (inclined plate settler) dramatically increases the effective settling area of a clarification tank without proportionally increasing the tank footprint. By installing closely-spaced inclined plates (at 55–60°) inside the settling zone, the total projected settling area is multiplied 8–15 times compared to an open tank of the same plan area. Particles only need to settle a short distance (50–100 mm between plates) before reaching a plate surface and sliding down to the sludge collection zone below. This enables hydraulic loading rates of 5–15 m³/m²/hr vs 1–2 m³/m²/hr for conventional open settling tanks — achieving the same clarification in a fraction of the space. The CG Lamella Clarifier can be supplied as a new standalone unit or as an internal retrofit pack for existing underperforming clarifiers.
Working Principle
Wastewater (after chemical coagulation/flocculation if required) enters the bottom zone below the inclined plate pack. The water rises upward through inclined plate channels. Suspended particles settle onto the upper surface of each inclined plate — since the settling distance to the nearest plate is only 50–100 mm, even slow-settling fine particles are captured. Settled particles and floc slide down the inclined surface under gravity into the sludge hopper below. Clarified water continues rising between the plates and overflows the top collection weir. Collected sludge is intermittently or continuously withdrawn by gravity or pump to dewatering.
Key Technical Features
- 8–15× the settling area of equivalent open tank
- Hydraulic loading rate: 5–15 m³/m²/hr
- SS removal: 80–95% with coagulation
- Plate material: PVC, polypropylene (PP), or FRP
- Plate angle: 55–60° — self-cleaning
- Plate spacing: 50–100 mm
- New-build unit or retrofit pack to existing tanks
- No moving parts in the settling zone
- Integral sludge hopper with discharge valve
Design Parameters
| Parameter | Value |
|---|---|
| Plate Material | PVC/PP/FRP |
| Plate Angle | 55–60° |
| Plate Spacing | 50–100 mm |
| HLR | 5–15 m/hr |
| SS Removal | 80–95% |
| Application | New Build/Retrofit |
Applications
- Primary clarification before biological treatment
- Tertiary polishing after secondary biological treatment
- Drinking water turbidity removal
- Industrial process water clarification
- Mine tailings and quarry runoff
- Stormwater and surface water treatment
- Upgrade of existing overloaded clarifiers
Advantages
- Reduces clarifier tank volume by 80–90%
- Retrofit option upgrades existing capacity without new civil construction
- No moving parts in settling zone — zero maintenance
- Self-cleaning inclined plates — sludge slides off by gravity
- Low headloss — gravity-fed operation
- High flow capacity per unit footprint
Frequently Asked Questions
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