Description

lamella clarifier for RO Pretreatment – Protecting Reverse Osmosis Membranes from Suspended Solid

WHAT IS LAMELLA CLARIFIER

Reverse osmosis is the leading technology for high-purity water production. However, RO membranes are expensive and sensitive to suspended solids, colloids, and turbidity. Feed water containing high levels of these contaminants can foul RO membranes, increasing pressure drop, reducing flux, and shortening membrane life. Frequent membrane cleaning reduces productivity and increases chemical costs.

The DAGYEE Lamella Clarifier for RO Pretreatment provides efficient clarification to protect downstream RO systems. By removing suspended solids, colloids, and turbidity to very low levels, it reduces the Silt Density Index (SDI) to levels acceptable for RO feed. This protects RO membranes, extends their service life, reduces cleaning frequency, and improves overall system performance.

Whether you are treating surface water, groundwater, or industrial wastewater for RO feed, this system provides reliable, low-maintenance clarification that is essential for a successful RO operation.

HOW DOES LAMELLA CLARIFIER WORKS

Step 1: Feed Water Intake
Raw water (surface water, groundwater, or pre-treated industrial water) enters the clarifier. A coarse screen removes large debris.

Step 2: Coagulation/Flocculation (Recommended)
For optimum solids removal, a coagulation and flocculation stage is essential. Coagulants neutralize particle charges, and flocculants bind particles into larger, more settleable flocs.

Step 3: Lamella Clarification
The flocculated water enters the Lamella Plate pack and flows upward between the inclined plates. The large effective settling area captures flocs and particles, producing high-quality clarified water.

Step 4: Effluent to RO System
The clarified water (with low SDI, low turbidity, and low suspended solids) is directed to the RO feed pumps for further treatment.

Step 5: Sludge Discharge
Settled solids collect in the sludge hopper and are removed periodically for disposal or further treatment.

Step 6: Back-up Filtration
An optional cartridge filter can be installed after the clarifier for additional protection of the RO system.

AVAILABLE DESIGNS KEY

What the System Removes

Contaminant	Removal Efficiency	Notes
Suspended solids	High	Particles effectively removed
Turbidity	To very low levels	Typical clarified water quality
Free oils and greases	High	Under standard operating conditions
Emulsified oils	Moderate	Without chemical addition
Metal hydroxides	High	With proper flocculation
Colloidal particles	Moderate to high	With coagulant/flocculant addition
Settleable solids	High	Particles with density greater than water

Lamella Clarifier Application

• Municipal Wastewater Treatment: Primary and secondary clarification

• Industrial Wastewater: Food processing, beverage, pulp & paper, chemical industries

• Water Treatment Plants: Raw water clarification for drinking water production

• Stormwater Treatment: Removal of suspended solids from stormwater runoff

• Process Water Recycling: Clarification for water reuse systems

• Mining Operations: Tailings clarification and process water recovery

• Power Plants: Cooling water treatment and blowdown clarification

• Aquaculture Systems: Water quality maintenance in recirculating systems

Customization Options

• Plate Materials: Choice of stainless steel, polypropylene, PVC, or FRP based on chemical compatibility

• Plate Coatings: Special coatings for specific applications (anti-fouling, anti-static, etc.)

• Inlet Arrangements: Center feed, peripheral feed, or bottom feed configurations

• Sludge Removal Systems: Chain-and-flight scrapers, traveling bridges, or suction systems

• Instrumentation Packages: Level sensors, turbidity meters, sludge density monitors

• Control Systems: Manual, semi-automatic, or fully automated PLC control

• Accessories: Chemical dosing systems, flocculation aids, sampling points

• Special Designs: Circular, rectangular, or square configurations based on space constraints

Pre-Treatment Requirements

Recommended Chemicals for RO Feed Clarification:

• Coagulant: Aluminum sulfate (alum), polyaluminum chloride (PAC), or ferric chloride. Dosage determined by jar testing.

• Flocculant: Anionic or cationic polymer. Dosage optimized for floc formation and settling.

• pH Adjustment: Acid or caustic to maintain optimum pH for coagulation (typically 6.5-8.0).

• Chlorine/Oxidant: Optional for biological control (requires dechlorination before RO).

Why Choose DAGYEE Lamella Clarifiers

Supplier Information

The DAGYEE Lamella Clarifier for RO Pretreatment provides reliable, efficient clarification to protect your reverse osmosis investment. By reducing suspended solids, turbidity, and SDI, it extends RO membrane life, reduces operating costs, and improves system performance.

Contact our team for a free consultation and customized system design for your RO pretreatment needs.

DAGYEE Water Technology
Protecting RO membranes from fouling.

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