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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 .
The iPod's dominance was challenged numerous times: in 2004 Sony's first hard disk Walkman was designed to take on the iPod, accompanied by its own music store Sony Connect; [117] [118] Microsoft initially attempted to compete using a software platform called Portable Media Center, and in later years designed the Zune line; [119] [120] the most ...
Point of use water filters are used in individual houses or offices to provide filtration of potable water close to the point of consumption. [1] The related topic, Point of use water treatment describes full-scale water treatment options and technologies designed to serve communities when municipal water treatment fails or is unavailable.
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The iPod Touch (stylized as iPod touch) is a discontinued line of iOS-based mobile devices designed and formerly marketed by Apple Inc. with a touchscreen-controlled user interface. As with other iPod models, the iPod Touch can be used as a portable media player and a handheld gaming device, but can also be used as a digital camera , a web ...
Roberts Filter Group is an American water filter production company founded in 1889 in Philadelphia, Pennsylvania, United States. The company is currently headquartered in Media, Pennsylvania and it is one of the largest suppliers of water-filtration products and services in the United States. [2] They are known for providing water treatment ...
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.
The history of water filters can be traced to the earliest civilisations with written records. Water filters have been used throughout history to improve the safety and aesthetics of water intended to be used for drinking or bathing. In modern times, they are also widely used in industry and commerce. The history of water filtration is closely ...