BW30HR LE Series: High Chemical Tolerance RO Membrane

The BW30HR LE series is a high-performance RO membrane series with core characteristics of high chemical tolerance, anti-fouling, high desalination rate and low energy consumption, specially designed for harsh water treatment environments.

1. Product Introduction

The BW30HR LE series is a high-performance RO membrane series with core characteristics of high chemical tolerance, anti-fouling, high desalination rate and low energy consumption, specially designed for harsh water treatment environments. It adopts advanced modified aromatic polyamide composite membrane material, combines precise spiral wound structure and anti-pollution surface modification technology, and integrates low-energy consumption optimization design, breaking through the performance bottleneck of traditional RO membranes in terms of chemical tolerance and energy consumption. Different from ordinary RO membranes, the BW30HR LE series has excellent resistance to acids, alkalis, oxidants and other chemical substances, can maintain stable performance in a wide pH range, and is not easy to be damaged by chemical pollutants in water. Its anti-fouling surface modification reduces the adsorption of colloids, organic matter and microorganisms, while the optimized flow channel design reduces energy consumption. It adopts standard modular design, which is easy to install and replace, and can be directly matched with most conventional water treatment systems without large-scale modification. The membrane element is vacuum-sealed and packaged with special protective solution, ensuring stable performance during transportation and storage, and adapting to various harsh water treatment environments such as industrial workshops and coastal areas.

2. Application Scenarios

Benefiting from its core advantages of high chemical tolerance, anti-fouling, high desalination rate and low energy consumption, the BW30HR LE series has a wide range of applications, focusing on high-demand water treatment scenarios. First, industrial pure water preparation, which is suitable for electronic, pharmaceutical, chemical and other industries that require high water quality, can effectively remove salts and impurities in water, providing high-quality pure water for production. Second, seawater desalination (secondary treatment), as a secondary RO membrane element, it further improves the quality of desalinated water, ensuring that the produced water meets the standards of industrial or domestic water. Third, ultrapure water production, which is a key component in the ultrapure water production process, can effectively remove various trace impurities, meeting the strict requirements of high-end industries for water quality. Fourth, micro-polluted water purification, which is applicable to rivers, lakes and other surface water sources with micro-pollution, removing organic matter, heavy metals and other pollutants, and improving water quality. In addition, it can also be used in industrial wastewater recycling and emergency water treatment scenarios, providing flexible and reliable water treatment solutions.

3. Technical Parameters

The technical parameters of the BW30HR LE series are precisely optimized to fully reflect its core characteristics, and the core parameters are as follows: the membrane material is modified aromatic polyamide composite membrane, non-toxic and harmless, with strong chemical tolerance, and the service life can reach 3-5 years; the nominal desalination rate is ≥99.7%, the minimum desalination rate is ≥99.5%, the organic matter rejection rate is ≥98.5%, and the produced water meets national industrial and drinking water standards; the recommended operating pressure is 0.6-1.0MPa, which is 15-20% lower than that of ordinary RO membranes, realizing low energy consumption operation; the operating temperature is 5-45℃, the inlet water pH value is 1-11 (cleaning pH value is 0.5-12), the inlet water Silt Density Index (SDI) is ≤5, and the inlet water turbidity is ≤1NTU; under standard conditions (25℃, 0.8MPa), the water production flux is 28-38m³/(m²·d), and the single membrane recovery rate is 18%; the physical size is 4040 standard size, the outer diameter × length is 3.88×40 inches, the dry weight is 5.5kg, and the effective membrane area is 37㎡; the cleaning cycle is 35-45 days, and the flux recovery rate after cleaning is ≥97%.

4. Product Advantages

The core advantages of the BW30HR LE series are concentrated in high chemical tolerance, anti-fouling, high desalination rate and low energy consumption, which accurately solve the key pain points of harsh water treatment scenarios. 

First, excellent high chemical tolerance, the modified membrane material has strong resistance to acids, alkalis and oxidants, can operate stably in the pH range of 1-11, and is not easy to be damaged by chemical substances in water, reducing the risk of membrane failure. 

Second, strong anti-fouling performance, the surface modification technology makes the membrane surface hydrophilic and electrically neutral, reducing the adsorption of colloids, organic matter and microorganisms, and the optimized spiral flow channel generates gentle scouring force, delaying membrane fouling. 

Third, high desalination rate and stable performance, the nominal desalination rate is as high as 99.7%, which can effectively remove salts, heavy metals and other harmful substances, and the performance is stable during long-term operation. 

Fourth, low energy consumption and environmental protection, the optimized flow channel design reduces water flow resistance, the recommended operating pressure is lower than that of ordinary RO membranes, reducing water pump energy consumption, in line with low-carbon development trends. 

Fifth, convenient installation and maintenance, the standard modular design is compatible with most conventional water treatment systems, and installation and replacement can be completed without professional technical personnel, saving maintenance time and cost.

5. Application Procedures

Combined with years of practical experience, the application procedures of the BW30HR LE series are simple and standardized, which is convenient for users to operate, and special attention should be paid to protecting the membrane from chemical damage during operation. Pre-installation preparation: Check the integrity of the membrane element, confirm that the surface and sealing ring are not damaged, and check that the protective solution is intact; clean the system pipeline, remove impurities such as rust and sediment, and prepare installation tools and monitoring instruments (especially pH and residual chlorine monitors). Membrane element installation: Install it into the pressure vessel according to the instructions, ensure that the connection is tight and the direction is correct, the water inlet and outlet cannot be reversed, and install the sealing ring to prevent water leakage. System commissioning: Turn on the power and water source, adjust the pressure to 0.8MPa, adjust the flow rate to the recommended value, run the system for 30-60 minutes, and check whether the desalination rate, flux and other parameters are normal. Normal operation: Regularly monitor the pressure, flux, desalination rate and water pH value, and keep records. If the pressure increases by 0.2MPa or the flux decreases by 20%, clean it in time. Membrane cleaning: According to the pollution type, prepare a special cleaning solution (acidic or alkaline), circulate and clean at 25-35℃ for 30-60 minutes, rinse with clean water until neutral, then restart. Daily maintenance: After the system is shut down, rinse the membrane element for 5-10 minutes, regularly check the sealing ring, and properly store it in the protective solution when not in use for a long time; avoid long-term contact with strong oxidants to prevent membrane damage.

6. Quality Standards

The BW30HR LE series strictly follows the dual international and domestic quality standards to ensure reliable and stable product performance, especially meeting the requirements of harsh water treatment. Internationally, it follows the ISO 9001 quality management system and ASTM D4516 test method; domestically, it complies with GB/T 30307-2013 "Reverse Osmosis Membrane Elements for Water Treatment" and GB/T 5749-2022 "Sanitary Standards for Drinking Water". Core quality requirements: The membrane material meets food-grade standards, no harmful substances are leached; the nominal desalination rate is ≥99.7%, the organic matter rejection rate is ≥98.5%, the flux recovery rate after cleaning is ≥97%, and each unit is subjected to 30 minutes of stable testing before leaving the factory; the membrane can withstand a maximum pressure of 3.0MPa (435psi), no deformation or water leakage, and the maximum pressure drop is ≤0.8bar (11.6psi); the chemical tolerance and anti-fouling performance reach the advanced level of the industry, and it can operate stably in harsh water environments for a long time; each batch of products has a unique production batch number and test report, which is fully traceable, and the deviation range of water production is within ±15%, and the deviation range of effective membrane area is within ±3%.

7. Working Principle

The BW30HR LE series realizes efficient water purification, high desalination, low energy consumption and anti-fouling based on the reverse osmosis principle, combined with modified membrane material technology and spiral wound structure design. Osmosis is a natural phenomenon in which water molecules spontaneously flow from a low concentration solution to a high concentration solution. Reverse osmosis applies a pressure greater than the osmotic pressure on the high concentration side (raw water side), forcing water molecules to pass through the semi-permeable membrane to the low concentration side (produced water side), while retaining salts, organic matter, heavy metals and other harmful substances. The modified aromatic polyamide composite membrane adopted by this series has a dense structure and a pore size of only 0.1-0.2 nanometers, which only allows water molecules to pass through, ensuring high desalination rate. The modified membrane material enhances chemical tolerance, making it resistant to corrosion by acids, alkalis and other chemical substances. The anti-fouling surface modification reduces pollutant adsorption, and the optimized spiral wound structure makes the water flow evenly distributed, generating gentle scouring force to wash away attached pollutants, delaying fouling; at the same time, the optimized flow channel reduces resistance, realizing low energy consumption operation.

8. Future Prospects

With the increasing demand for high-quality water and low-carbon development, the BW30HR LE series, with its core advantages of high chemical tolerance, anti-fouling, high desalination rate and low energy consumption, has broad development prospects. In the future, this series will be intelligently upgraded, integrating Internet of Things and sensor technology to realize real-time monitoring of membrane performance, chemical tolerance and fouling degree, and automatic reminder of cleaning and maintenance. It will also continuously optimize the membrane material modification technology, further improve chemical tolerance, anti-fouling performance and water production flux, and reduce energy consumption. At the same time, it will expand application scenarios to new energy, new materials and other emerging fields, promote the recycling of water resources, improve the recycling rate of waste membranes, and reduce environmental pollution. In addition, it will provide one-stop services, covering product supply, installation and commissioning, maintenance and technical guidance, to further improve user experience.

9. Conclusion

As a high-performance RO membrane series with high chemical tolerance/anti-fouling, high desalination rate and low energy consumption, the BW30HR LE series takes modified aromatic polyamide composite membrane as the core and spiral wound structure as the support, integrating chemical tolerance enhancement, anti-fouling optimization and low-energy consumption design. It effectively solves the pain points of traditional RO membranes such as poor chemical tolerance, easy fouling, high energy consumption and unstable performance in harsh water treatment scenarios. Its quality meets international and domestic standards, adapts to various high-demand water treatment scenarios, can efficiently remove salts and pollutants in water, ensure stable and qualified water production, and reduce energy consumption and operation and maintenance costs. With the continuous optimization of technology, the BW30HR LE series will play a more important role in the field of water treatment, helping to promote the green, low-carbon and sustainable development of the water treatment industry.

10. Frequently Asked Questions (FAQs)

Q1: What is the core function of the BW30HR LE series? 

A1: The core function is to realize efficient water purification through the reverse osmosis principle, with the characteristics of high chemical tolerance, anti-fouling, high desalination rate and low energy consumption, which can effectively retain salts, heavy metals, organic matter and other harmful substances in water, and maintain stable operation in harsh water environments.

Q2: What is the service life of the BW30HR LE series, and how to extend it? 

A2: The service life is 3-5 years under normal maintenance. Regularly clean the membrane element according to the fouling situation, keep the operating parameters stable, avoid long-term contact with strong oxidants, replace the damaged sealing ring in time, and properly store it in the protective solution when not in use for a long time, which can extend the service life.

Q3: Can this series be used for seawater desalination? 

A3: Yes, it can be used as a secondary RO membrane element in seawater desalination systems, further improving the quality of desalinated water, ensuring that the produced water meets the standards of industrial or domestic water, and it has the advantages of low energy consumption and anti-fouling, which can reduce the operation cost of seawater desalination projects.

Q4: What should I do if the flux decreases during operation? 

A4: First, check whether the inlet water quality (such as pH value, organic matter content) is abnormal; second, check whether the membrane is fouled, and clean the membrane element in time with a special cleaning solution; finally, check whether the operating pressure is within the recommended range, and adjust it in time to ensure stable flux.

Q5: Is special pretreatment required for the BW30HR LE series? 

A5: It is recommended to carry out targeted pretreatment according to the water quality. For water with high suspended solids and colloids, filter to remove impurities; for water containing residual chlorine, carry out dechlorination treatment to avoid damaging the membrane; the pretreatment can be matched with conventional equipment without additional investment, which can further extend the service life of the membrane.