Let us know if you have suggestions to improve this article (requires login). This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). Any filtration system has a few basic components: the feed, the filter, and the filtrate. There are many different methods of filtration; all aim to attain the separation of substances. Your doctor can calculate it from the results of your blood creatinine test, your age, body size and gender. The size of the largest particles that can successfully pass through a filter is called the effective pore size of that filter. In water & wastewater management, filtration is adopted in the initial stages to remove the colloidal & suspended impurities. (2) The process of separating suspended particles from the fluid through a porous material in which the fluid … Fluids flow through a filter due to a difference in pressure—fluid flows from the high-pressure side to the low-pressure side of the filter, leaving some material behind. The term "filtration" applies whether the filter is mechanical, biological, or physical. It is an acronym for "high efficiency particulate air [filter]" (as officially defined by the U.S. Dept. The filter may be paper, cloth, cotton-wool, asbestos, slag- or glass-wool, unglazed earthenware, sand, or other porous material. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Water from inlets located in the water supply, such as a lake, is sent to be mixed, coagulated, and flocculated and is then sent to the waterworks for purification by filtering and chemical treatment. Water filtration is a general term that refers to any system or process that is used to filter out particles and pollutants from water. Water Filtration. Modern filter pads are made of cellulose fibres of various porosities or consist of membrane filters, also in a range of porosities. Vacuum Filtration technique is most preferred for small batch of solution in order to quickly dry out small crystals. Furnaces use filtration to prevent the furnace elements from fouling with particulates. In radiology, process of attenuating and hardening a beam of x- or gamma rays by interposing a filter between radiation source and the object being irradiated. Filter media may be divided into two general classes: (1) thin barriers, exemplified by a filter cloth, filter screen, or common laboratory filter paper; (2) thick or en masse barriers, such as sand beds, coke beds, porous ceramics, porous metal, and the precoat of filter aid which is often used in the industrial filtration of fluids that contain gelatinous precipitates. sand filter). Also, when the solid particles are very fine, it is often cheaper and easier to discard the contaminated granules than to clean the solid sieve.  Oversize particles may form a filter cake on top of the filter and may also block the filter lattice, preventing the fluid phase from crossing the filter, known as blinding. Two main types of filter media are employed in laboratories: a surface filter, a solid sieve which traps the solid particles, with or without the aid of filter paper (e.g. Omissions? The fluid to be filtered will pass through the filter medium only if some driving force is applied. Most industrial filtration processes involve the use of pressure or vacuum, depending upon the type of filter used, to increase the rate of filtration and also to decrease the size of the equipment required. Filtration is a separation technique that is used to separate a solid that has not dissolved in a liquid (for example a precipitate). These filter aids can be used in two different ways. The first type allows the solid particles, i.e. For the mathematical concept, see, Article on "Water treatment solution: Filtration", retrieved on 15 October 2013 from, Lecture notes, Postgraduate course on Filtration and Size separation at the Department of Chemical Engineering, University of Lougborough, England, Learn how and when to remove this template message, http://www.lenntech.com/chemistry/filtration.htm, Cantilenae Intelectuales de Phoenice Redivivo, Chymical Wedding of Christian Rosenkreutz, Suspicions about the Hidden Realities of the Air, https://en.wikipedia.org/w/index.php?title=Filtration&oldid=991535354, Articles with dead external links from September 2020, Articles needing additional references from August 2018, All articles needing additional references, Articles needing additional references from July 2020, Articles with Encyclopædia Britannica links, Creative Commons Attribution-ShareAlike License, Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a, Filtration, as a physical operation is very important in chemistry for the separation of materials of different chemical composition. eGFR - Estimated glomerular filtration rate is the best test to measure your level of kidney function and determine your stage of kidney disease. Filtration occurs both in nature and in engineered systems; there are biological, geological, and industrial forms.. filtration synonyms, filtration pronunciation, filtration translation, English dictionary definition of filtration. Also used are wood cellulose and other inert porous solids such as the cheaper and safer perlite.