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- Membrane abstract "A membrane is a selective barrier that allows the passage of certain constituents and retains other constituents found in the liquid. The influent of a membrane is known as the feed-stream, the liquid that passes through the membrane is known as the permeate and the liquid containing the retained constituents is the retentate or concentrate.The concept of a membrane has been known since the eighteenth century, but was used little outside of the laboratory until the end of World War II. Drinking water supplies in Europe had been compromised by the war and membrane filters were used to test for water safety. However, due to the lack of reliability, slow operation, reduced selectivity and elevated costs, membranes were not widely exploited. The first use of membranes on a large scale was with micro-filtration and ultra-filtration technologies. Since the 1980s, these separation processes, along with electrodialysis, are employed in large plants and, today, a number of experienced companies serve the market.The degree of selectivity of a membrane depends on the membrane pore size. Depending on the pore size, they can be classified as microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membranes. Membranes can also be of various thickness, with homogeneous or heterogeneous structure. Membranes can be neutral or charged, and particle transport can be active or passive. The latter can be facilitated by pressure, concentration, chemical or electrical gradients of the membrane process. Membranes can be generally classified into synthetic membranes and biological membranes.".
- Membrane thumbnail Schematic_size.jpg?width=300.
- Membrane wikiPageExternalLink hollow-fibre-membranes.html.
- Membrane wikiPageExternalLink tubular-membranes.html.
- Membrane wikiPageExternalLink default.asp?page=tekst.asp&id=235&fader=181.
- Membrane wikiPageExternalLink default.asp?page=tekst.asp&id=286&fader=181.
- Membrane wikiPageExternalLink facrc=_&imgdii=_&imgrc=jYwiDw7T-N5YjM%3A%3Bs21Xs2kVDROB2M%3Bhttp%253A%252F%252Fwww.induceramic.com%252F_%252Frsrc%252F1313636320994%252Fporous-ceramics-application%252Ffiltration-separation-application%252FCross%252520filtration.jpg%253Fheight%253D219%2526width%253D400%3Bhttp%253A%252F%252Fwww.induceramic.com%252Fporous-ceramics-application%252Ffiltration-separation-application%3B397%3B219.
- Membrane wikiPageID "26456640".
- Membrane wikiPageRevisionID "600613325".
- Membrane hasPhotoCollection Membrane.
- Membrane subject Category:Fouling.
- Membrane subject Category:Membrane_technology.
- Membrane subject Category:Water_technology.
- Membrane subject Category:Water_treatment.
- Membrane subject Category:Membranes.
- Membrane comment "A membrane is a selective barrier that allows the passage of certain constituents and retains other constituents found in the liquid. The influent of a membrane is known as the feed-stream, the liquid that passes through the membrane is known as the permeate and the liquid containing the retained constituents is the retentate or concentrate.The concept of a membrane has been known since the eighteenth century, but was used little outside of the laboratory until the end of World War II.".
- Membrane label "Membran (Trennschicht)".
- Membrane label "Membrana".
- Membrane label "Membrane (physique)".
- Membrane label "Membrane".
- Membrane label "膜".
- Membrane sameAs Membrána.
- Membrane sameAs Membran_(Trennschicht).
- Membrane sameAs Membrane_(physique).
- Membrane sameAs Membrana.
- Membrane sameAs m.0h5612k.
- Membrane sameAs Q176088.
- Membrane sameAs Q176088.
- Membrane wasDerivedFrom Membrane?oldid=600613325.
- Membrane depiction Schematic_size.jpg.
- Membrane isPrimaryTopicOf Membrane.
