Product introduction

BW (Brackish Water) membrane is an aromatic polyamide composite membrane element for desalting brackish Water developed by Hangzhou E-MEM Environmental Technology co., LTD. BW has the characteristics of low operating pressure, high flux and high rejection rate. It has a high removal rate for dissolved salts, TOC, SiO2 and other substances, especially for the preparation of high purity water in the electronic and power industries. BW series membrane elements are suitable for desalination of surface water, groundwater, tap water and municipal water with a salt content of less than 8000ppm. They are mainly used in the fields of industrial pure water and power plant boiler make-up water of various fields, as well as brackish water applications such as high-concentration saline wastewater and beverage water manufacturing.

Performance parameters of membrane element

E-MEM®（BW）series membranespecifications

Models		Permeate Flow GPD （m3/d）	Salt rejection（%）	Active membrane area ft2(m2)	Testing pressure Psi (MPa)	Testing condition
BW-4040		2400(9.1)	99.5	90.4(8.4)	225(1.55)	2000ppm NaCl
BW-365		9500(36.1)	99.5	365(34.0)	225(1.55)	2000ppm NaCl
BW-400		10500(39.7)	99.5	400(37.0)	225(1.55)	2000ppm NaCl
Other Testing condition	Temperature（℃）	25.0±1.0
	Feed water pH	7.5±0.5
	recovery（%）	15.0±1.0
available		Dry & Wet

Specification and size

（a）

（b）

E-MEM®（BW）series membrane size

Model	A(±2.0mm)	B(±1.0mm)	C(±0.1mm)	D(±0.1mm)	Pic
BW-4040	1016	100	19.1(OD)	26.7	a
BW-365	1016	200	28.6	---	b
BW-400	1016	200	28.6	---	b

Ultimate service conditions

Max.operating pressure--------------------------600psi（4.14MPa)

Max.feed water temperature ---------------------45℃

Max. feed water flow----------------------------- 75GPM（17m3/h）（BW-365、BW-400）

16GPM（3.6m3/h）（BW-4040）

Max.feed SDI15--------------------------------------5

Feed free chlorine concentration ------------- ＜0.1ppm

pH range, continuous running -------------- ------3~10

Feed PH range when chemical cleaning ---------- 2~12

Maximum pressure drop(single membrane)- ---- 15 psi（0.1MPa）

matters needing attention

①. The data and information provided by HangzhouE-MEM Environmental Technology Co., Ltd in this sample are all obtained throughlong-term experiments, and we are convinced that these data and information areaccurate and effective. Customers are requested to use the product in strictaccordance with the design, use and maintenance requirements of the product andkeep relevant data records. Hangzhou E-MEM Environmental Technology Co., Ltd shall not bear any consequences arising from customers' failure to use and maintain the products in accordance with the conditions provided by this sample.

②. The permeate flow listed in the table is theaverage value, and the deviation of single membrane element of permeate flow is±15%.

③. Before products leaving the factory, the drymembrane element has no protective liquid, while the wet membrane element isstored and treated with 1.0% sodium bisulfite (10% glycerin antifreeze added inwinter) solution and vacuum-packed.

④. Dry membrane elements should always be kept wetafter wetting. When wet membrane element is not used for a long time, in orderto prevent the growth of microorganisms, it is recommended to soak the membraneelement with protective liquid containing 1.0% sodium bisulfite (food grade)(prepared with RO production water).

⑤. For initial use of membrane elements, it isrecommended to flush first at low pressure for 15-25 minutes and then at highpressure for 60-90 minutes (water production not less than 50% of the system design).All production and concentrated water shall be discharged within the first hourof membrane element operation.

⑥.It is prohibited to add any chemical agent that has an impact on the membraneelement in storage and operation. If such chemical agent is violated, Hangzhou E-MEMEnvironmental Technology Co., Ltd will not bear all the consequences arisingtherefrom.

RO Membrane

NF membrane

UF membrane module

submerged UF (TXP)

MBR membrane

E -MEM® BW series

Product introduction

Performance parameters of membrane element

Specification and size

Ultimate service conditions

matters needing attention