What is a Clarifier?
A clarifier is a settling tank that uses gravity to separate suspended solids (sludge) from liquids in water/wastewater treatment. It allows heavier particles to settle at the bottom while clarified water flows out from the top.
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![Clarifier In Water Treatment Plant]()
Clarifier In Water Treatment Plant1.Coagulation-Flocculation Support: Receives chemically treated water where micro-flocs aggregate into settleable particles.view more
2.Gravity Settling: Slow-flow design allows solids to descend as sludge while clarified water rises.... -
![Clarifier Design]()
Clarifier DesignWe engineer high-efficiency clarifiers for optimal solids separation in municipal and industrial applications – from primary sedimentation to advanced tertiary treatment.view more -
![ROCKERHILL Lamella Clarifier]()
ROCKERHILL Lamella ClarifierWe engineer high-efficiency clarifiers for optimal solids separation in municipal and industrial applications – from primary sedimentation to advanced tertiary treatment.view more
Advantages of Clarifiers
High Efficiency
Removes up to 95% of settleable solids.
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Low Energy Use
Relies on gravity, minimizing power consumption.
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Chemical Reduction
Often reduces need for coagulants/flocculants.
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Scalability
Suitable for small to large-scale operations.
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Sludge Concentration:
Produces dense sludge for easier dewatering.
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Main Features
Design Shape
Circular or rectangular.
Flow Type
Inclined plates/tubes (lamella) or conventional horizontal flow.
Sludge Removal
Scrapers/rakes (mechanical) or hydraulic suction.
Retention Time
Adjustable based on influent load.
Surface Loading Rate
Critical for efficiency (m³/m²/day).
Types of clarifiers
Primary Clarifiers
Treat raw wastewater (solids removal before biological treatment).
Secondary Clarifiers
Settle biological floc (e.g., post-activated sludge).
Lamella Clarifiers
Use inclined plates/tubes to shorten settling distance—compact and high-capacity.
Solids Contact Clarifiers
Combine mixing, flocculation, and settling in one unit.
Ballasted Flocculation
Add weight (e.g., microsand) to accelerate settling.
Applications of clarifiers
Municipal WWTPs: Primary/secondary treatment stages.
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Industrial Effluents: Mining, food processing, chemical plants.
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Drinking Water Plants: Sedimentation after coagulation.
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Stormwater Management: Remove sediments from runoff.
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Sludge Thickening: Concentrate biosolids before digestion.
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