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ULTRAFILTRATION (UF) Plants

Ultrafiltration (UF)Membrane Modules

UF Membrane modules come in plate-and-frame, spiral-wound, and tubular configurations. All configurations have been used successfully in different process applications. Each configuration is specially suited for some specific applications and there are many applications where more than one configuration is appropriate. For high purity water, spiral-wound and capillary configurations are generally used. The configuration selected depends on the type and concentration of colloidal material or emulsion. For more concentrated solutions, more open configurations like plate-and-frame and tubular are used. In all configurations the optimum system design must take into consideration the flow velocity pressure drop, power consumption, membrane fouling and module cost.


UF Membrane Materials

A variety of materials have been used for commercial UF membranes, but polysulfone, PVDF and cellulose acetate are the most common. Recently thin-film composite UF membranes have been introduced. For high purity water applications the membrane module materials must be compatible with chemicals such as hydrogen peroxide used in sanitizing the membranes on a periodical basis.


Molecular-Weight Cut off (MWCO)

Pore sizes for UF membranes range between 0.001 and 0.100 micron. However, it is more customary to categorize membranes by MWCO For instance, a membrane that removes dissolved solids with molecular weights of 10,000 and higher has an MWCO of 10,000. Obviously, different membranes even with the same molecular-weight cut off, will have different pore size distribution. In other words, different membranes may remove species of different molecular weights to different degrees. Nevertheless, MWCO serves as a useful guide when selecting a membrane for a particular application.


General Applications

Drinking Water Treatment

Pre-treatment to RO plants (Sea Water / Surface Water)

Tertiary treatment to STPs and ETPs

Waste water recycle plants

Industrial Uses - Power Generation, Food & Beverage Processing, Pharmaceutical Production, biotechnology and semiconductor manufacturing.