1. Product Introduction
Our Industrial Reverse Osmosis (RO) Membrane is a high-performance thin-film composite (TFC) spiral-wound separation element, engineered as the core component for advanced water purification systems. With a precise pore size of 0.0001 μm, it delivers a salt rejection rate up to 99.8%, effectively removing dissolved salts, heavy metals, bacteria, viruses, organic pollutants, silica, and other micro-impurities from feed water.
Designed for long-term stable operation in harsh industrial environments, our RO membrane series covers Brackish Water RO (BWRO), Seawater RO (SWRO), and Low-Fouling RO (LFRO) models, tailored for high-purity water production, desalination, and wastewater resource utilization. Adopting cross-linked aromatic polyamide active layer and high-strength support structure, it balances high water flux, exceptional rejection efficiency, and outstanding chemical resistance, fully complying with international industrial water treatment standards for electronics, pharmaceuticals, food & beverage, chemical engineering, and municipal environmental protection sectors.
2. Core Features & Advantages
2.1 Ultra-High Separation Efficiency
Stable salt rejection: BWRO models reach 99.7–99.8%, SWRO models up to 99.86%, ensuring permeate water quality meets strict industrial and drinking water standards.
Broad-spectrum impurity removal: Eliminates 99%+ of bacteria, viruses, colloids, organic matter, and heavy metals, with silica rejection up to 99.7% for high-purity water demands.
2.2 Energy-Saving & High Flux Design
Optimized membrane surface structure reduces operating pressure by 15–20% compared to conventional products; equipped with high-permeability channels to increase water production while cutting energy consumption, lowering long-term operational costs.
2.3 Outstanding Anti-Fouling & Durability
Hydrophilic modified membrane surface minimizes adsorption of organic matter and scaling ions, extending cleaning cycles; corrosion-resistant and chlorine-tolerant (residual chlorine 1 ppm) design extends service life to 3–5 years under normal operation.
2.4 Strong Adaptability & Standardization
Available in mainstream industrial specifications (4040/8040), compatible with most commercial RO systems; supports series/parallel configuration for flexible capacity expansion, adapting to diverse water quality conditions (brackish water, seawater, reclaimed water).
2.5 Stable Performance & Easy Maintenance
Consistent output under fluctuating feed water temperature, pressure, and TDS; supports automated online cleaning (CIP), with intuitive performance monitoring indicators for simplified daily maintenance.
3. Working Principle
Reverse Osmosis (RO) reverses the natural osmosis process by applying external pressure higher than the feed water’s osmotic pressure to drive water molecules selectively through the semi-permeable RO membrane, while blocking dissolved salts, ions, microorganisms, and organic molecules.
Osmosis vs. Reverse Osmosis: Natural osmosis moves water from low-concentration to high-concentration sides; RO reverses this flow via external pressure (10–60 bar for brackish water, 55–83 bar for seawater).
Selective Separation Mechanism: The 0.0001 μm membrane pores only allow water molecules (diameter ~0.28 nm) to pass, rejecting hydrated ions (0.66–0.72 nm), bacteria (200–10,000 nm), and viruses (20–400 nm).
System Process: Feed water → Pretreatment (sediment filtration, activated carbon, softening) → High-pressure pump → RO membrane module → Permeate (pure water) / Concentrate (waste brine).
This physical separation process requires no chemical additives, ensuring no secondary pollution and stable pure water output.
4. Application Scenarios
4.1 Industrial High-Purity Water Field
4.1.1 Electronics & Semiconductor
Provides 18.2 MΩ·cm ultrapure water for wafer cleaning, chip manufacturing, LCD production, and integrated circuit processing. Removes micro-particles, ions, and silica to prevent defects in lithography and etching, guaranteeing product yield and reliability.
4.1.2 Pharmaceutical & Biotechnology
Produces GMP-compliant purified water and water for injection (WFI), removing pyrogens, microorganisms, and impurities to meet USP, EP, and ChP standards for drug synthesis, medical device cleaning, and laboratory research.
4.1.3 Food & Beverage
Purifies raw water for bottled water, juice, dairy, and wine production; removes odor, heavy metals, and microorganisms to ensure product taste, safety, and shelf life; supports non-thermal concentration of beverages to retain nutritional value.
4.1.4 Chemical & Electroplating
Supplies process water for chemical synthesis and electroplating, removing hardness ions and impurities to ensure uniform plating layers and stable chemical reactions; recycles plating wastewater to reduce raw material loss and environmental discharge.
4.2 Seawater & Brackish Water Desalination
4.2.1 Seawater Desalination
Core technology for coastal water scarcity solutions, converting seawater (TDS 32,000 mg/L) to drinking water with energy recovery devices, reducing energy consumption by 35–60% for large-scale municipal and industrial water supply.
4.2.2 Brackish Water Treatment
Purifies inland high-salinity groundwater (TDS 1,000–5,000 mg/L) into irrigation and drinking water, solving freshwater shortages in arid regions.
4.3 Environmental Protection & Wastewater Resource Utilization
4.3.1 Municipal Wastewater Reuse
Combined with MBR pretreatment, RO achieves 85%+ water recovery rate for reclaimed water used in urban greening, road cleaning, and industrial reuse, following Singapore’s "NEWater" model.
4.3.2 Industrial Wastewater Zero Liquid Discharge (ZLD)
Treats high-salinity wastewater from electroplating, printing, mining, and petrochemical industries; concentrates and recycles water resources, achieving near-zero discharge and complying with environmental regulations.
4.3.3 Emergency Water Supply
Mobile RO units rapidly purify surface water, groundwater, and disaster-area water into safe drinking water, supporting emergency rescue and field operations.
5. Technical Data (Typical Specifications)
| Parameter | BWRO (4040/8040) | SWRO (4040/8040) | Testing Condition |
|---|
| Salt Rejection | 99.7–99.8% | 99.6–99.86% | 25℃, 2000 mg/L NaCl (BWRO); 32000 mg/L NaCl (SWRO) |
| Permeate Flow | 4040: 9.8–10 m³/d; 8040: 41.6–50.3 m³/d | 4040: 7.2–21.9 m³/d; 8040: 26.5–49.2 m³/d | Rated pressure, 15% recovery |
| Operating Pressure | 1.05–1.55 MPa | 5.52–6.0 MPa | — |
| pH Range (Operation) | 2–11 | 2–11 | Continuous operation |
| Max Feed Water Temperature | 45℃ | 45℃ | — |
| SDI (Feed Water) | ≤5 | ≤5 | — |
| Residual Chlorine |
|
| To protect membrane |
| Differential Pressure per Element | ≤0.07 MPa | ≤0.07 MPa | — |
6. Operation & Maintenance Guidelines
Proper maintenance ensures membrane performance and extends service life; follow these key practices:
6.1 Daily Operation
Control feed water SDI ≤5, residual chlorine ppm, and temperature 5–45℃; avoid sudden pressure/temperature fluctuations.
Maintain minimum concentrate flow to prevent concentration polarization, scaling, and fouling.
Monitor permeate TDS, flow rate, and differential pressure daily; record data for trend analysis.
6.2 Routine Cleaning
Physical flushing: Daily low-pressure flushing (pressure to remove surface sediments.
Chemical cleaning (CIP): Trigger cleaning when permeate flow drops by 10–15%, differential pressure rises by 15%, or salt rejection decreases:
Acid cleaning (citric/nitric acid): Removes inorganic scaling (CaCO₃, CaSO₄).
Alkaline cleaning (sodium hydroxide + surfactant): Removes organic matter and biofilms.
6.3 Long-Term Storage
Flush and drain the membrane if shutdown >72 hours; inject 1% sodium bisulfite protective solution to prevent microbial growth.
Store in a dry, cool environment (5–35℃), avoiding freezing and direct sunlight.
6.4 Replacement Cycle
7. Frequently Asked Questions (8 FAQs)
Q1: What is the difference between BWRO and SWRO membranes?
A: BWRO handles brackish water (TDS 0 mg/L) at 10–16 bar; SWRO treats seawater (TDS ~32,000 mg/L) at 55–83 bar with higher pressure resistance and rejection.
Q2: How to judge if the RO membrane needs cleaning?
A: Clean when permeate flow ↓10–15%, differential pressure ↑15%, or salt rejection ↓10% under consistent operating conditions.
Q3: Can RO membranes remove bacteria and viruses?
A: Yes; 0.0001 μm pores block 99%+ of bacteria and viruses, meeting drinking water safety standards.
Q4: Why is residual chlorine limited to <0.1 ppm?
A: Chlorine oxidizes and irreversibly damages polyamide TFC membranes; use activated carbon or sodium bisulfite to remove chlorine.
Q5: How long does an industrial RO membrane last?
A: 3–5 years with proper pretreatment and maintenance; shorter in high-fouling/ high-salinity environments.
Q6: Can RO membranes treat high-temperature feed water?
A: Max operating temperature is 45℃; high temperatures reduce rejection and accelerate aging—use cooling systems if needed.
Q7: What pretreatment is required for RO membranes?
A: Multi-media filtration, activated carbon, softening, and security filtration to remove particles, chlorine, hardness, and reduce SDI ≤5.
Q8: Is permeate from RO membrane suitable for direct drinking?
A: Yes; it removes salts, bacteria, and heavy metals. For potable use, add post-treatment (UV, mineralization) as needed.
8. Conclusion
Our Industrial RO Membrane integrates high separation efficiency, energy-saving design, and durable performance, serving as a core solution for industrial high-purity water production, seawater/brackish water desalination, and wastewater resource utilization. It empowers electronics, pharmaceutical, food & beverage, chemical, and municipal environmental sectors with stable, safe, and sustainable water treatment, helping customers reduce costs, comply with regulations, and achieve green development.
We provide customized membrane solutions, technical support, and after-sales service to meet diverse water treatment needs. Choose our RO membrane for reliable, efficient, and long-lasting water purification performance.
