Brackish Water RO Membrane
BW Series Industrial Brackish Water RO Membrane for Groundwater & Industrial Water Desalination Projects.
- • 99.7% high salt rejection for steady outlet water quality
- • Hydrophilic membrane resists dirt from organics and colloids easily
- • Works well with brackish water of 2000~10000ppm salt content
BW Series Brackish Water RO Membrane
High desalination brackish water reverse osmosis membrane elements
RO Membrane BW8040
- Effective Membrane Area: 400 ft² /37 m²
- Flux: 11000 GPD(41.6m³/d)
- Salt Rejection: 99.7%
RO Membrane BW8440
- Effective Membrane Area: 440 ft² /41 m²
- Flux: 12000 GPD(45m³/d)
- Salt Rejection: 99.7%
RO Membrane BW4040
- Effective Membrane Area: 78 ft² /7.2 m²
- Flux: 2500 GPD(9.5m³/d)
- Salt Rejection: 99.7%
RO Membrane BW2540
- Effective Membrane Area: 30 ft² /2.8 m²
- Flux: 1800 GPD(6.8m³/d)
- Salt Rejection: 99.2%
RO Membrane BW2521
- Effective Membrane Area: 13 ft² /1.2 m²
- Flux: 370 GPD(1.4m³/d)
- Salt Rejection: 99.2%
RO Membrane BW4021
- Effective Membrane Area: 36 ft² /3.3 m²
- Flux: 1000 GPD(3.8m³/d)
- Salt Rejection: 99.5%
Brackish Water RO Membrane Specifications
Technical parameters for industrial reverse osmosis membrane models
| Model | Effective Membrane Area ft²(m²) |
Average Yield GPD(m³/d) |
Salt Rejection (%) |
Recovery Rate (%) |
|---|---|---|---|---|
| BW-2521 | 13 (1.2) | 370 (1.4) | 99.2 | 8 |
| BW-2540 | 30 (2.8) | 800 (3.0) | 99.2 | 15 |
| BW-4021 | 36 (3.3) | 1000 (3.4) | 99.5 | 15 |
| BW-4040 | 78 (7.2) | 2500 (9.5) | 99.7 | 15 |
| BW-8040 | 400 (37) | 11000 (41) | 99.7 | 15 |
| BW-8440 | 440 (41) | 12100 (45) | 99.7 | 15 |
Note: All specifications are measured under standard test conditions (25°C, 2000 ppm NaCl, 15% recovery for 4040/8040/8440 models). Actual performance may vary based on feed water quality and operating conditions.
Stable Performance for Critical Applications
When treating brackish water, unstable membrane performance can lead to:
- Increased energy consumption
- Frequent CIP cleaning
- Unstable permeate conductivity
- Reduced recovery rate
- Unexpected replacement costs
Our BWRO Solution Delivers:
- Stable ≥99% salt rejection
- Optimized operating pressure
- Reduced fouling tendency
- Extended membrane lifespan
- Reliable compatibility with standard 4040 & 8040 vessels
Designed for industrial RO systems operating continuously in municipal, power plant, and manufacturing environments.
Why Engineering Companies Choose Our BWRO Membranes
Balanced Flux & Rejection Design
High flux alone increases fouling risk. High rejection alone increases pump load.
Our membranes maintain:
- Stable permeate conductivity
- Controlled permeate flow
- Lower differential pressure growth
Reduces cleaning frequency & operating cost.
Lower Operating Pressure
Compared to conventional medium-pressure membranes:
- Reduced pump power consumption
- Lower mechanical stress
- Improved long-term stability
Save energy over 3–5 years operating cycle.
Enhanced Anti-Fouling Surface
Hydrophilic surface modification improves:
- Organic fouling resistance
- Biofouling control
- Easy cleanability during CIP
Stable output under industrial conditions.
Application Scenarios
Our Brackish Water RO Membranes are widely applied in:
Groundwater Desalination
Municipal and industrial groundwater treatment
Municipal Water Treatment
Large-scale water treatment plants
Boiler Feed Water
Preparation for power plants and industrial boilers
Textile Industry
Process water systems and wastewater treatment
Electronics Manufacturing
High-purity water for semiconductor production
Industrial Wastewater Reuse
After proper pretreatment for water recycling
If your feed water TDS is below 10,000 ppm, BWRO membranes are typically the most cost-efficient solution.
Replacement & OEM Capability
Our membranes are fully compatible with:
- Standard 4040 & 8040 pressure vessels
- International industrial RO system configurations
Available Services:
- OEM private label manufacturing
- Bulk project supply
- Technical data support
- Stable long-term export supply
- Engineering consultation
For distributors and project contractors, we ensure consistent batch quality and reliable lead times.
Technical Operating Limits
To ensure optimal lifespan
Maximum Operating Pressure
600 psi
Max Temperature
45°C
pH Range (continuous)
2-11
SDI
≤ 5
Free Chlorine
< 0.1 ppm
Correct pretreatment design is essential for long-term stability.
How to Select the Right BWRO Membrane
We Require:
- 1 Feed water analysis report
- 2 Required permeate capacity (m³/h)
- 3 Target recovery rate
- 4 Application type
Our Engineering Team Will:
- Evaluate scaling risk
- Estimate expected permeate conductivity
- Recommend optimal membrane configuration
- Provide project quotation
Response time: within 24 hours.
Cost Optimization for EPC & Integrators
For engineering companies and system integrators
Competitive Pricing
Wholesale pricing for bulk orders
Stable Capacity
Reliable production capacity
Flexible Cooperation
Project cooperation models
Custom Branding
Custom packaging & branding
We support municipal engineering firms, industrial EPC contractors, and water treatment integrators globally.
Frequently Asked Questions
Technical guidance for brackish water RO membrane selection and operation
Still have technical questions about membrane selection or replacement?
Send us your water analysis report -- our engineers will assist you directly.
What TDS range is suitable for brackish water RO membranes?
Brackish water RO membranes are typically designed for feed water with TDS between 2,000-10,000 ppm. If salinity exceeds this range, a seawater RO membrane is usually recommended due to higher operating pressure requirements.
What is the difference between BWRO and SWRO membranes?
The main differences are:
- Operating pressure
- Salt rejection structure
- Structural strength
- Energy consumption
BWRO membranes operate at lower pressure and are optimized for medium salinity water, while SWRO membranes are designed for high-salinity seawater applications.
What is the typical salt rejection rate?
Under standard test conditions (2,000 ppm NaCl, 25°C, 15% recovery):
- 4040 BWRO membrane: ≥ 99%
- 8040 BWRO membrane: ≥ 99.5%
Actual rejection depends on feed water composition and system design.
How long does a brackish water RO membrane last?
With proper pretreatment (SDI ≤ 5, turbidity < 1 NTU), typical service life is 3-5 years under industrial operation.
Factors affecting lifespan include:
- Scaling tendency
- Organic fouling
- Cleaning frequency
- Operating pressure
Can your membranes replace international brand elements directly?
Yes.
Our 4040 and 8040 brackish water RO membranes are dimensionally compatible with standard industrial pressure vessels and can be used as direct replacements in most existing systems without structural modification.
We recommend verifying operating pressure and flow design before replacement.
What pretreatment is required before BWRO membranes?
To protect membrane performance, the feed water should meet:
- SDI ≤ 5
- Turbidity < 1 NTU
- No free chlorine (≤ 0.1 ppm)
- Proper hardness control to prevent scaling
Typical pretreatment includes:
- Multimedia filtration
- Activated carbon filtration
- Softening or antiscalant dosing
- Cartridge filtration (5 micron)
How often should membranes be cleaned (CIP)?
Cleaning is recommended when:
- Permeate flow declines by 10-15%
- Salt rejection drops by 10%
- Pressure differential increases by 15%
Actual cleaning frequency depends on feed water quality and system recovery rate.
What is the recommended recovery rate for brackish water systems?
Typical system recovery:
- 60-75% for groundwater applications
- Lower recovery may be required for high scaling risk water
Recovery design should be based on full water analysis and scaling calculation.
Do you provide membrane selection support for projects?
Yes.
If you provide:
- Feed water analysis
- Target permeate capacity
- Application type
- Required recovery rate
Our engineering team will recommend suitable membrane models and provide technical support within 24 hours.
Do you support OEM or private labeling?
Yes.
We provide:
- OEM branding
- Custom packaging
- Bulk project supply
- Stable export logistics
- Long-term cooperation for distributors and EPC contractors
All membranes undergo individual wet testing before shipment.
Request Technical Datasheet or Project Quotation
If you are currently:
✓ Designing a new RO system
✓ Replacing existing BWRO membranes
✓ Quoting a municipal or industrial project
✓ Looking for a reliable OEM membrane supplier
Contact us with your water analysis.
Our engineers will provide:
- Model recommendation
- Technical parameters
- Performance expectations
- Bulk pricing proposal
We will help you select the right brackish water RO membrane for stable long-term operation.
CONTACT SHANGHAI CM
We'd love to hear from you. Please fill out the form or contact us directly using the information below.