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What are the Different Ways Water Filters are Used?

Aug 4, 2008
Besides biological and chemical processes, physical barriers are made use of to remove impurities from water, in the devices that are known as water filters. Irrigation systems, drinking water supply systems, aquariums and swimming pools require clean water and cleansing water for these is among the major applications of water filters.

Water filters of different types and of different varieties can be employed for the cleaning of water. In systems for the treatment of drinking water and waste water, a key stage in the process is constituted by filtration. Before the water enters into the system of distribution, the suppliers generally filter it, especially in the case of water for drinking. Water filters for domestic use may be used at the premises of the consumers, in order to carry out filtration in addition to that carried out at the suppliers' end.

In the domestic use water supply, the water filters of the portable kind may be attached either before the tap or directly on the tap. Portable water filter units may, in those ways, be deployed at the point of use. Among the reasons for water filters being used is the improvement of aesthetics that these can help bring about. This is besides the fact that water filters remove substances that are harmful from the water and, so, offer protection against health risks. Lead and chlorine are among the chemicals and metals that are removed by domestic use water filters.

Processes like ion exchange, adsorption or sieving, among others, may form the basis of water filters, in terms of physics. The passage of water through holes in a screen or sieve, leads to particles larger than the holes being removed. However, the use of water filters can help to clean out particles that are even smaller.

Based on water treatment plants, the various kinds of water filters include disk filters, cloth filters, slow sand filter beds, media filters, screen filters and rapid sand filters.

Membranes for ultra-filtration, granular activated carbon filters, carbon block resin, microporous ceramic filters and metallic alloy filters are among the ones that may be deployed at the point of use. Many of these technologies may be employed in the composite form in many filters. Drinking water in small quantities may be filtered by using a jug filter. In order to reduce limescale effect, mainly, filters of such type are built into kettles, at times.

The fine meshes that are in use in water filters have to be replaced at regular intervals. When the filters get clogged on account of impurities, on the outer side, the impurities have to be abraded away. Disease is prevented by the removal of microbial cysts, protozoa and bacteria, through the utilization of water filters. A specialized kind of filter is used to clean water that then passes through a flexible silicon tube that has a screen filter inside it, in portable water filters. Some of these are built into water bottles while others use siphon drip systems for passage of water and yet others use mechanically operated hand pumps. The military, organizations that provide aid during humanitarian crises and those who go on hikes for recreation are among the poeple that utilize portable water filters.

These water filters should not be confused with water purifiers, often in tablet of device form. The use of some water purifiers can help to clean out viruses that include hepatitis A and rotavirus.

Water that is safe for drinking may not be easily accessible to some people on account of reasons that may include poverty and they can make good use of water filters that do not have high costs. Outdoor enthusiasts and soldiers also often utilize water filters that can be prepared on site. Sand, firewood that has been burnt, grass or other materials that may be available can be used to prepare such water filters.
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