Asymmetric Membrane*

A membrane in which the pore size and structure vary from one side of the membrane to the other. Membrane surfaces in the feed channel usually exhibit smaller pore sizes than those present further into the depth when the membrane is used for reverse osmosis, nanofiltration and ultrafiltration.

*This definition was reprinted by permission from the "Dictionary of Filtration and Separation". The "Dictionary" contains over 1500 definitions and 400 diagrams and photos. More information on the "Dictionary" and order form can be found here.

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