Sea Water Reverse Osmosis Membrane

Sea Water Reverse Osmosis Membrane: High-Efficiency Desalination, Reliable Performance

Seawater reverse osmosis desalination uses semi-permeable membranes to separate dissolved solids, splitting feed water into purified freshwater and concentrated brine. This process removes over 99% of dissolved solids and salts, producing high-quality freshwater.

Key Advantages

✅ High Salt Rejection: ≥99.8% rejection rate for 35,000 ppm NaCl feedwater (standard seawater salinity) at 800 psi;
✅ Strong Adaptability: Adjustable operating pressure (600-1,000 psi) for both seawater and brackish water;
✅ Wide Temperature Tolerance: Works stably in 5°C-45°C, ideal for tropical/subtropical seawater;
✅ Easy Maintenance: Resistant to acids and alkalis (pH 2-11), compatible with cleaning agents like citric acid.

Versatile Applications

Suitable for small-scale yacht desalination units to municipal-level seawater desalination plants, providing reliable freshwater for coastal communities, islands, and industrial facilities (e.g., power plants, chemical plants).

Durable Material

Uses Thin-Film Composite (TFC) technology with a polyamide active layer, ensuring strong chemical stability and resistance to corrosion even with prolonged seawater exposure.

Technical Specifications

📊 Membrane Type: Thin-Film Composite (TFC) with polyamide active layer (high chemical stability)
📊 Salt Rejection: ≥99.8% (for 35,000 ppm NaCl feedwater at 800 psi)
📊 Operating Pressure: 600-1,000 psi (adjustable for seawater/brackish water)
📊 Temperature Range: 5°C-45°C (tropical/subtropical seawater friendly)
📊 pH Tolerance: 2-11 (resistant to cleaning chemicals like citric acid)

Client Case (Middle East Desalination Plant)

A Saudi Arabian desalination plant replaced older membranes with our SWRO units for a 100,000m³/d project.
Results:

• Salt rejection improved from 99.2% to 99.8% (meeting WHO drinking water standards).
• Cleaning frequency reduced by 30% (anti-fouling TFC material minimized biofouling).
• Annual maintenance cost cut by $120,000 (fewer membrane replacements).

SWRO membrane specification

What's the difference between SWRO and brackish water RO membranes?

A: SWRO membranes are designed for high-salinity water (35,000+ ppm) with thicker active layers to withstand 600-1,000 psi pressure, while brackish membranes target lower salinity (1,000-10,000 ppm) at 200-400 psi.

Can your SWRO membranes handle high-temperature seawater (e.g., 40°C)?

A: Yes. Our TFC material tolerates up to 45°C, making it suitable for tropical regions like the Persian Gulf or Southeast Asia.
 

How long does it take to recover performance after chemical cleaning?

A: Most membranes regain 95-98% of their initial flux within 24 hours post-cleaning, depending on fouling severity.

In what fields are seawater reverse osmosis membrane systems widely used?

A: Seawater reverse osmosis membrane systems are widely used in desalination plants, ships, marine aquaculture, and other fields.

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