The Brackish Water Ro Membrane series is suitable for desalination and deep treatment of brackish water with a salinity below 10,000 ppm, surface water, groundwater, tap water, and municipal water.
It offers excellent desalination performance and high water yield.
It is widely used in municipal water supply, surface water reuse, boiler feed water, food industry water, coal chemical industry, papermaking, textile printing and dyeing, material concentration, and purification and refining.
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Brackish Water RO Membrane is a high-performance separation membrane element specifically designed for water sources with salinity ranging from 1,000 to 10,000 ppm. It is widely applied in industrial water treatment, municipal water supply, and specialized separation fields. As a China brackish water RO membrane manufacturer and brackish water RO membrane supplier, Jiangsu Bangtec Huachuang Sci-tech Co., Ltd. leverages the technical expertise of a team led by PhD graduates from the Chinese Academy of Sciences and overseas high-level talents to develop a comprehensive product line covering low-pressure, medium-pressure, high-pressure, and anti-fouling industrial BW RO membrane and industrial BW-FR RO membrane series. These products have achieved internationally leading performance levels, providing efficient and reliable water treatment solutions for industries including photovoltaics, lithium batteries, steel, power generation, chemicals, printing and dyeing, and coal chemicals.
Brackish Water RO Membrane operates based on the selective permeability of semi-permeable membranes. Under externally applied pressure exceeding the osmotic pressure of the solution, water molecules permeate through the membrane layer while dissolved salts, heavy metal ions, organic compounds, and microorganisms are retained. Typical brackish water sources contain salinity between 1,000 ppm and 10,000 ppm, with operating pressures generally controlled within 0.6 MPa to 2.1 MPa, achieving salt rejection rates of 98.5% to 99.5%.
The brackish membrane developed by Jiangsu Bangtec Huachuang Sci-tech Co., Ltd. employs polyamide composite thin-film technology with precisely regulated surface charge density, resulting in higher rejection rates for divalent ions (Ca2+, Mg2+, SO4 2-) compared to monovalent ions (Na+, Cl-). In a typical industrial application with feed water TDS of 3,000 ppm, the permeate conductivity can be reduced below 30 μS/cm, meeting the requirements for boiler feedwater preparation and electronic-grade ultrapure water production.
Industrial BW RO membrane and industrial BW-FR RO membrane differ significantly in structural design and application scenarios. The BW series is suitable for conventional brackish water treatment, while the BW-FR series features anti-fouling optimization for high-fouling water sources. The following table provides an overview of Bangtec's main brackish water membrane products:
| Product Series | Applicable Water Source | Typical Salt Rejection | Operating Pressure Range | Permeate Flow (8-inch Element) | Key Features |
| Low-Pressure BW Series | Low-salinity brackish water (1,000-3,000 ppm) | ≥98.5% | 0.6-1.0 MPa | 9,000-11,000 GPD | Low energy consumption, suitable for municipal water supply |
| Medium-Pressure BW Series | Medium-salinity brackish water (3,000-7,000 ppm) | ≥99.0% | 1.0-1.6 MPa | 8,000-10,000 GPD | Balanced salt rejection and permeate flow |
| High-Pressure BW Series | High-salinity brackish water (7,000-10,000 ppm) | ≥99.2% | 1.6-2.1 MPa | 7,000-9,000 GPD | High salt rejection for precision industries |
| BW-FR Anti-Fouling Series | High SDI brackish water | ≥98.8% | 1.0-1.8 MPa | 7,500-9,500 GPD | Wide feed spacer, resistant to organic fouling |
Brackish water membrane applications in the industrial sector have expanded from standalone water treatment to comprehensive multi-industry solutions. The following are the primary application scenarios with Bangtec's actual performance data:
Photovoltaic Industry: Monocrystalline silicon wafer cutting requires ultrapure water with resistivity reaching 18 MΩ·cm. Using Bangtec industrial BW RO membrane as a pretreatment stage, feed water TDS of 2,500 ppm can be reduced below 25 ppm, providing qualified influent for subsequent EDI polishing. A leading photovoltaic enterprise processes 1.2 million tons annually, with membrane elements operating continuously for over 36 months.
Steel Industry: Circulating cooling water and boiler feedwater treatment in steel plants require strict salt rejection standards. A major steel group adopted Bangtec BW-FR anti-fouling series to treat high-hardness brackish water (TDS 4,500 ppm, hardness 680 mg/L), achieving stable permeate recovery rates above 75% and extending chemical cleaning intervals from 45 days to 120 days.
Printing and Dyeing Industry: Wastewater reuse in printing and dyeing applications demands high color and COD removal efficiency. Bangtec brackish water membrane achieved COD rejection rates above 85% and permeate color below 5 Hazen units in a Jiangsu printing and dyeing park water reclamation project, meeting the GB/T 19923-2005 standard for reclaimed urban wastewater for industrial use.
Selecting the appropriate Brackish Water RO Membrane requires comprehensive evaluation of source water quality, permeate requirements, operating costs, and system stability. The following are key selection factors:
Water Quality Analysis: Feed water TDS, hardness, SDI value, pH, and temperature are fundamental parameters for selection. When SDI exceeds 5, the BW-FR anti-fouling series is recommended. When hardness exceeds 500 mg/L, softening pretreatment should be incorporated.
Pressure Matching: The low-pressure BW series is suitable for TDS below 3,000 ppm, reducing pumping energy consumption by approximately 25% to 30%. The high-pressure BW series, while consuming more energy, ensures permeate quality under high-salinity conditions.
Recovery Rate Design: Typical recovery rates for brackish water systems range from 70% to 85%. Excessive recovery rates increase scaling risks on the concentrate side, requiring antiscalant dosing and periodic chemical cleaning.
Brackish Water RO Membrane serves as a core technology component in the industrial water treatment sector, and the scientific selection and application directly impact system operational efficiency and economics. Jiangsu Bangtec Huachuang Sci-tech Co., Ltd., leveraging the technical strength of the Chinese Academy of Sciences doctoral team and the innovation support of overseas R&D institutions, continues to provide high-performance industrial BW RO membrane and industrial BW-FR RO membrane products for the global market. Whether for conventional brackish water desalination or complex industrial wastewater reuse, Bangtec offers customized membrane separation solutions to help customers achieve efficient water resource utilization and sustainable development goals.
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No.28 Wenjing Road, Nangtong High-tech Industrial Development Zone, Jiangsu Province, China
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