BW30HR LE-400/34 Low Energy High Rejection Brackish Water RO Membrane-XINXIANG LIFEIERTE FILTER CORP. LTD

BW30HR LE-400/34 Low Energy High Rejection Brackish Water RO Membrane

BW30HR LE-400/34 is a premium low-energy high-rejection brackish water RO membrane designed for commercial and industrial water treatment systems. Serving as an upgraded alternative to BW30-400/34 membrane elements, this spiral-wound polyamide composite membrane adopts a 34mil wide feed channel structure to balance stable high salt rejection and low-pressure operation. It effectively cuts system energy consumption, resists common membrane fouling, and supports long-cycle continuous operation. Widely deployed in brackish water desalination, boiler feed water purification, industrial reclaimed water treatment and municipal water upgrading projects, it delivers consistent water quality and lowers overall operational costs for global water treatment integrators and manufacturing enterprises.

Product Description

The BW30HR LE-400/34 is an 8-inch industrial low-pressure reverse osmosis membrane element optimized for medium and low salinity brackish water treatment. Featuring a 400 sq.ft effective membrane area and standard 34mil feed spacer design, this membrane abandons the high-pressure operating mode of traditional industrial RO membranes, realizing efficient water production under reduced system pressure. It maintains a stabilized salt rejection rate up to 99.4% under standard test conditions, with stable permeate flow and excellent impurity interception capacity. Compatible with mainstream 8-inch RO pressure vessels and capable of direct replacement of conventional industrial brackish water membrane elements, it requires no pipeline or program modification during equipment upgrading. The product adopts full physical filtration without chemical addition, effectively intercepting dissolved salts, colloids, TOC, heavy metal ions and suspended solids in raw water. With a wide pH tolerance range and strong chemical cleaning resistance, it adapts to complex raw water quality in industrial parks, mining areas and municipal water plants, supporting 24-hour continuous stable operation of large-scale water treatment systems.

Working Principle

The BW30HR LE-400/34 operates based on thin-film composite polyamide reverse osmosis principle and selective molecular sieving technology. When low hydraulic pressure slightly higher than raw water osmotic pressure acts on the feed side, water molecules pass freely through the dense polyamide active layer of the membrane element. In contrast, inorganic salt ions, macromolecular organic pollutants, microbial colonies and particulate contaminants are physically trapped on the feed water side and discharged with concentrated brine. Different from ordinary ultrafiltration membranes that only intercept large particles, this RO membrane optimizes molecular permeability to reduce water transmission resistance. The built-in 34mil wide flow channel enhances water turbulence, eliminates dead water zones and alleviates concentration polarization, avoiding local salt accumulation and membrane surface scaling. This continuous physical separation process realizes efficient salt-water separation and long-term stable water purification without secondary pollution.

Technical Features

1. Low-Energy High-Flux Membrane Formula:

Adopts upgraded hydrophilic modified membrane material, reducing system operating pressure by nearly 30% compared with traditional high-rejection RO membranes. It maintains high water flux while greatly cutting power consumption of high-pressure pumps, realizing energy-efficient full-load operation.

2. Ultra-Stable High Salt Rejection:

Features a compact and dense polyamide active layer structure, achieving stable interception of sodium chloride, silica, boron, nitrate and TOC. The comprehensive salt rejection rate stably reaches 99.4%, fully meeting industrial desalination and high-purity water preparation standards.

3. 34mil Thickened Wide Flow Channel Design:

Optimizes the internal fluid flow state of the membrane element, enhances water turbulence scouring capacity, effectively reduces pollutant deposition and membrane concentration polarization, and significantly improves the anti-fouling performance of the RO membrane.

4. Wide pH Chemical Tolerance:

Supports continuous stable operation within pH 2–11 and short-term chemical cleaning within pH 1–13. It adapts to various acid and alkali cleaning processes and complex fluctuating water quality in industrial and municipal water projects.

5. High-Strength Integral Spiral Wound Structure:

The integrated forming process improves the overall structural rigidity of the RO membrane element, resists instantaneous water hammer impact and system pressure fluctuation, and ensures long-term continuous and stable operation of the water treatment system.

Product Advantages

1. Superior Energy-Saving Performance:

As a typical low-energy RO solution, BW30HR LE-400/34 reduces system overall power consumption by 15%–25% compared with conventional 8-inch brackish water membranes. It effectively lowers long-term electricity costs for large-scale water treatment plants with non-stop operation.

2. Long Service Life & High Stability:

Modified polyamide membrane material features outstanding oxidation resistance and chemical tolerance. It resists microbial fouling and scale erosion, maintaining stable water yield and salt rejection throughout the service cycle with lower replacement frequency.

3. Strong Anti-Fouling Adaptability:

The 34mil wide flow channel enhances fluid scouring force, reduces dirt adhesion and concentration polarization. It performs excellently in turbid and slightly polluted raw water scenarios with lower blocking risk.

4. Low Maintenance Cost:

Support conventional acid and alkali cyclic cleaning with wide pH adaptability. The cleaning cycle is longer than ordinary membranes, and daily flushing and maintenance procedures are simple, minimizing equipment downtime.

5. High Universal Compatibility:

Standard 8-inch size matches mainstream pressure vessels and water treatment systems. It can directly replace BW30-400/34 and BW30FR-400/34 without equipment modification, realizing fast and low-cost system upgrade.

Application Fields

1. Industrial Process Water Treatment:

Ideal for boiler feed water desalination in power, thermal and petrochemical industries to prevent pipeline and boiler scaling. It also serves as core pretreatment filtration for ultra-pure water production in electronics, pharmaceutical and food processing industries.

2. Brackish Water & Groundwater Desalination:

Suitable for inland brackish water, high-mineral groundwater and rural saline water treatment, reducing water salinity to meet industrial and domestic drinking water standards.

3. Municipal Water Purification Project:

Applied to urban tap water advanced purification and domestic water quality upgrading, removing excess salt, colloids and harmful impurities to improve municipal water supply safety.

4. Industrial Reclaimed Water Reuse:

Used for secondary purification of factory wastewater and circulating water, reducing water conductivity and organic content to realize factory water recycling and save water resources.

5. Commercial Centralized Water Supply:

Matched with large-scale commercial water treatment equipment for industrial parks, schools and commercial zones to provide stable standard pure water for centralized water supply systems.

FAQs

Q1: What is the biggest advantage of BW30HR LE-400/34 over standard brackish water RO membranes?

A1: Its core advantage is low-energy high-efficiency operation. It reduces operating pressure and system energy consumption by nearly 30% while maintaining 99.4% high salt rejection, solving the high operating cost pain point of traditional high-pressure membrane elements. The upgraded anti-fouling structure also delivers more stable long-term performance.

Q2: Can BW30HR LE-400/34 replace BW30-400/34 directly without equipment modification?

A2: Yes. BW30HR LE-400/34 adopts unified 8-inch standard size and installation parameters, fully compatible with BW30-400/34 and BW30FR-400/34. It supports plug-and-play replacement with no need to modify pressure vessels, pipelines and control systems.

Q3: What are the standard operating parameter ranges for this membrane element?

A3: The standard continuous operating pressure is 28–41 bar, operating temperature ranges from 5℃ to 45℃. The continuous working pH range is 2–11, and the short-term chemical cleaning pH range is 1–13. Operating within standard parameters ensures maximum membrane element service life and stable water quality.

Q4: How to maintain BW30HR LE-400/34 to prevent premature fouling?

A4: Conduct regular forward flushing every 7–10 days to remove surface suspended pollutants. Perform alkaline cleaning for organic and microbial fouling and acidic cleaning for inorganic scale. Adjust cleaning cycles from 1 to 3 months according to raw water SDI value, and avoid long-term over-pressure and over-limit pH operation.

Q5: What raw water conditions is BW30HR LE-400/34 suitable for?

A5: This low-energy RO membrane is designed for medium and low salinity brackish water, groundwater, municipal tap water and industrial recycled water, with a maximum allowable feed water SDI of 5. It is not applicable for direct filtration of high-salinity seawater and heavily polluted industrial wastewater.

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