Brackish water RO membranes are designed for the desalination of groundwater and low-salinity water sources. They provide high salt rejection, high permeate flow, low operating pressure, and excellent long-term performance for industrial, municipal, and commercial water treatment systems.
Description
Filmedia® – High Quality Reverse Osmosis Membrane Manufacturer
Filmedia® is a leading reverse osmosis membrane manufacturer, dedicated to providing high-quality reverse osmosis membrane solutions to customers around the world. We provide a variety of reverse osmosis membranes for home and industrial applications to meet different water treatment needs. Our reverse osmosis membranes are made of high-quality materials and have excellent filtration performance, providing you with clean and safe water resources.
FR (Fouling Resistant) Brackish Water RO Membrane Element
By combining high desalination efficiency with excellent fouling resistance, FR membrane elements provide a reliable and cost-effective solution for modern water treatment and water reuse applications.
- Enhanced Hydrophilic Surface for Superior Anti-Fouling Performance
Through a proprietary surface modification process, the RO membrane surface becomes significantly more hydrophilic. This enhanced hydrophilicity effectively minimizes the adhesion and accumulation of organic contaminants, colloids, microorganisms, and inorganic scale-forming salts. As a result, membrane fouling and scaling are substantially reduced, leading to longer cleaning intervals, lower operating costs, and extended membrane service life.
- Designed for Brackish Water Treatment Applications
The membrane element is suitable for treating various water sources, including surface water, groundwater, municipal tap water, and other brackish water supplies with TDS levels ranging from 2,000 to 5,000 mg/L. Its superior anti-fouling characteristics make it particularly effective in challenging feed water conditions where conventional RO membranes may experience rapid performance decline.
- Ideal for Water Reuse and Industrial Wastewater Treatment
FR membrane elements are widely used in industrial water treatment, municipal water reuse, wastewater reclamation, and industrial effluent purification systems. They are especially recommended for reclaimed water projects in large and medium-sized enterprises, treatment of industrial wastewater containing low concentrations of organic pollutants, high-salinity industrial wastewater treatment, and advanced purification of municipal wastewater effluent.
- Reliable Performance with Lower Operating Costs
By combining high desalination efficiency with excellent fouling resistance, FR membrane elements provide a reliable and cost-effective solution for modern water treatment and water reuse applications. Their ability to maintain stable performance under demanding operating conditions helps reduce maintenance requirements, extend membrane lifespan, and maximize overall system efficiency.
Models
|
Model no. |
Active membrane
area |
Feed channel spacer |
Product
water output |
Stabilized salt
rejection |
Minimum salt
rejection |
| Ft2(m2) | (mil) | GPD (m3/d) | (%) | (%) | |
| BW-4040 | 85 (7.9) | 31 | 2400 (9.1) | 99.5 | 99.2 |
| BW-8365 | 365 (33.9) | 31 | 9500 (35.9) | 99.5 | 99.2 |
| BW-8400 | 400 (37.2) | 31 | 10500 (39.7) | 99.5 | 99.2 |
Note：
- The stated performance is initial data taken after 30 minutes of operation based on the following conditions: 2000 ppm NaCl, 225psi (15.5bar) 25℃, pH 7.5, 15% recovery.
- Permeate flow rate for individual elements may vary with tolerance within 15%.
Working Principle
The core of a BWRO membrane is a selectively semipermeable membrane. Driven by external pressure that exceeds the osmotic pressure of the solution, water molecules pass through the membrane pores. Meanwhile, impurities such as dissolved inorganic salts, heavy metals, organic matter, bacteria, and viruses are retained on the concentrate side of the membrane, achieving purification and separation.
Typical Applications
- Groundwater Desalination
Removal of excessive salts and minerals from groundwater.
- Industrial High-Purity Water Production
Water supply for industries such as electronics, power generation, chemicals, and pharmaceuticals.
- Municipal Water Supply
Improving drinking water quality in high-salinity areas.
- Boiler Feedwater
Reducing the risk of scaling and enhancing equipment operating efficiency.
- Wastewater Reuse
Recovering industrial wastewater to enable water resource recycling.
Operation & Maintenance Guidelines
Feed Water Pretreatment Requirements
- Silt Density Index (SDI) ≤ 5
- Turbidity < 0.1 NTU
- Residual chlorine must be completely removed, as chlorine causes irreversible damage to polyamide RO membranes.
- Antiscalant dosing is required to prevent scaling caused by calcium, magnesium, and silica.
Operating Conditions
- Operating pH Range: 2–11
- Chemical Cleaning pH Tolerance: 1–12 (short-term exposure)
- Standard Operating Temperature: 25°C
- Maximum Temperature Limit: 45°C
Cleaning Frequency
- Groundwater Applications: Chemical cleaning every 3–6 months.
- Surface Water / Reclaimed Water Applications: Chemical cleaning every 1–3 months.
- Regular low-pressure flushing is recommended to reduce surface fouling and maintain membrane performance.
Service Life
- Under proper pretreatment and operating conditions, the membrane service life is typically 2–3 years.
- Inadequate pretreatment can accelerate membrane fouling and degradation, resulting in noticeable performance decline within one year or less.
