Overview of membrane filters © Siemens Stiftung 2016 CC BY-SA 4.0 international

Overview of membrane filters

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Table:
An overview of the different pressure-driven membrane filtration processes.

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2018-10-26
Membrane filters consist of a microporous material. During filtration of water suspended particles above a certain size are retained while smaller particles can pass through the membrane unimpeded.
Apart from typical applications of the individual filter types, this tabular overview also lists the main parameters. Plastic is generally used as the filter material, although metal and ceramic membranes are also possible in principle. Depending on the size of the particles to be separated out and the pore size of the membrane the filtration process is referred to as microfiltration, ultrafiltration, nanofiltration or reverse osmosis. The smaller the pores are, the greater the applied pressure difference has to be in order to force the water through the membrane.

Information and ideas:
Information on the individual filtration processes for further study can be found in the “Guideline for water treatment" on the media portal of the Siemens Stiftung.
Information sheet
Biology; Chemistry; Physics; Technology
Grade 10 to 13
Middle/high school
Drinking water; Nanotechnology; Water treatment
Siemens Stiftung Media Portal
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© Siemens Stiftung 2016
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