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Schematic diagram of a Berkefeld filter Berkefeld field filter. A Berkefeld filter [1] is a water filter made of diatomaceous earth ().It was invented in Germany in 1891, and by 1922 was being marketed in the United Kingdom by the Berkefeld Filter Co. [2] Berkefeld was the name of the owner of the mine in Hanover, Germany, where the ceramic material was obtained.
A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out for a variety of ...
A Victorian ceramic water filter. Ceramic water filters (CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, [1] and portable ceramic filters are commonly used in backpacking. [2]
Cook safe. A hundred years since its inception, KitchenAid is ready to drop its most modern product yet. It unveiled a smart display here at CES 2019 and managed to differentiate from other ...
A modern Purolator oil filter. The company was founded in 1923 as Motor Improvements, Incorporated in New York City. [1] The company's Purolator (initially stylized PurOlator and sometimes Pur-O-Lator) oil filtration device, [2] invented in 1922 by Ernest John Sweetland [3] and George H. Greenhalgh, [1] was standard equipment on early 1920s Chrysler automobiles after being launched on the ...
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