Brackish Water Anti-Fouling Reverse Osmosis Membrane BW-4040

The BW (Brackish Water) series membrane elements are aromatic polyamide composite membrane elements developed by Haitong Environmental Protection Technology Co., Ltd. for desalination of brackish water. They feature low-pressure operation, high water production, and excellent salt removal performance.

◎ Product Introduction and Application Fields

　　The BW (Brackish Water) series membrane elements are aromatic polyamide composite membrane elements developed by Haitong Environmental Protection Technology Co., Ltd. for desalination and softening of brackish water. They feature low-pressure operation, high water production, and excellent salt removal performance. In addition, these elements exhibit outstanding efficiency in removing dissolved salts, TOC, and SiO2, making them particularly suitable for the preparation of high-purity water in the electronics and power industries. Primarily used to treat brackish water with relatively high salinity or water sources with complex compositions, these elements can effectively remove harmful substances from water, including dissolved salts, heavy metals, colloids, microorganisms, and organic compounds. They are especially well-suited for integrated systems that require large volumes of purified water. While ensuring superior water quality, these elements also demonstrate strong resistance to fouling, thereby extending their service life. Their optimized design enables a recovery rate of over 90%, significantly enhancing treatment efficiency. These membrane elements find wide application in sectors such as power generation, petrochemicals, steel plants, desalination stations, wastewater treatment plants, and environmental protection.

 

◎ Model Specifications and Parameters

Product Model	Effective membrane area ft² (㎡)	Application test pressure psi (MPa)	Water production GPD (m³/d)	Stable Desalination Rate / %
BW-4040-HR	90 (8.4)	225 (1.55)	2400 (9.1)	99.7
BW-4040-HF	90 (8.4)	225 (1.55)	2700 (10.2)	99.5
BW-4040-FR	90 (8.4)	225 (1.55)	1900 (7.2)	99.8

 

　　a. The water production rate and desalination rate are based on the following test conditions: softened tap water at 2000 ppm, water temperature of 25℃, pH of 7.5, a single-element recovery rate of 15%, and the rated operating pressure specified above.

　　b. The water production of a single component may vary within a range of ±15%.

 

◎ Operating Limits

 

Operating limit	Membrane element type	Polyamide composite membrane
	Maximum operating temperature	45℃
	Maximum working pressure	600 psi (4.14 MPa)
	Maximum Inflow Rate	14 GPM (3.2 m³/h)
	Minimum brine flow rate	3 GPM (0.7 m³/h)
	Continuous operating pH range	3-10
	pH range for chemical cleaning	2-12
	Maximum Silt Density Index (SDI) for Inlet Water 15	5
	Maximum Inlet Turbidity/NTU	1
	Maximum residual chlorine concentration in influent / (mg/L)	0.1
	Maximum pressure drop for a single component	15 (0.1) psi (MPa)