News | February 23, 2013

NEW 8x20 Stainless Steel Membrane Contactor For Dissolved Gas Control Targets Moderate Liquid Process Flow Rates

Source: 3M Separation and Purification Sciences Division

Membrana-Charlotte, a Division of Celgard, LLC, has introduced a new 8x20-inch stainless steel Liqui-Cel Membrane Contactor to its portfolio of dissolved gas control products. This FDA compliant device provides beverage and pharmaceutical customers with an option to economically design membrane-based systems with flow rate requirements that fall in between existing low and high flow rate products available in the market recently.

A single 8x20-inch Liqui-Cel Contactor can process 1-11.4 m3/hr (5-50 gpm) and operate up to 10.3 bar (150 psig) at 25° C. The contactor uses a 316L SS housing with sanitary connections and a cartridge of polypropylene hollow fibers which is placed inside the housing. This compact device has an average membrane surface area of 53 m2 (570.5 ft2) making it highly efficient at adding or removing dissolved gases from liquid streams.

Membrana-Charlotte combines advanced membrane knowledge, application experience and Liqui-Cel Membrane Contactor expertise to provide innovative separation solutions. Liqui-Cel Membrane Contactors have low energy requirements and can reduce chemical use which contributes to low operating costs and supports customer sustainability objectives. Liqui-Cel Contactors are modular and compact and can achieve very low dissolved gas outlet concentrations. They are rapidly replacing older deaeration technologies as the product of choice in power generation, semiconductor, oil/gas, food and beverage, pharmaceutical, analytical/biotechnology and many other industries. Liqui-Cel Membrane Contactors also operate cleanly and require much less space compared to other technologies. These devices have processed over 749,000 m3/hr (3.3 million gpm) of liquids worldwide and have been operating in a variety of applications for over 20 years.

Dissolved CO2 removal from water can improve Ion Exchange (IX) and EDI/CDI efficiency after RO. For example, In EDI/CDI systems excess CO2 can lead to the formation of ionic species that contribute to the total ionic load of an EDI unit, resulting in higher conductivity. In IX systems, reducing dissolved CO2 concentration lowers bed regeneration frequency resulting in more efficient operations. Chemical consumption, such a NaOH, can also be reduced in double pass RO systems.

O2 also negatively impacts many processes; it is corrosive and can oxidize water treatment system components. In the power and industrial areas, piping and equipment are susceptible to corrosion. In the semiconductor and ink markets, high levels of dissolved gases can cause lower yields and slower process speeds. Liqui-Cel Contactors are also used to add gases to liquids to enhance megasonic cleaning. The beverage industry utilizes membrane contactor technology for carbonation, nitrogenation and deoxygenation. These applications are only a few examples of the many opportunities where Liqui-Cel Membrane Contactors can be used for gas transfer. Membrana’s Industrial & Specialty Filtration Business also manufactures a variety of membranes and devices used for filtration in various industries and applications.

About Membrana
Membrana-Charlotte is a Division of Celgard, LLC of Charlotte, North Carolina and is part of Polypore International, Inc. Polypore is a global high technology filtration company specializing in microporous membranes. Polypore's flat sheet and hollow fiber membranes are used in specialized applications that require the removal or separation of various materials from liquids, primarily in the ultrafiltration and microfiltration markets. Based in Charlotte, North Carolina, Polypore International, Inc. is a global leader with manufacturing facilities and sales offices in nine countries serving six continents. For more information, visit

Source: 3M Separation and Purification Sciences Division