Water is one of the essential chemical substances on the planet. It covers 71% of the Earth’s surface, and the human body is composed of water by up to 75%. Water is vital for a large number of activities, including agriculture, science, medicine, transportation, heating, recreation, and food processing, as well as washing and, perhaps most important of all, drinking.
For a large part of the people, drinking water comes through a municipal supply that. In theory, it delivers safe drinking water but often presents unpleasant tastes and odors of chemicals such as chlorine, which are used to disinfect it and keep it free of germs and bacteria. Problems such as chlorine taste/smell and lime formation can be resolved by using commercial water filtration systems.
What Is A Water Filter?
A water filter is a device that removes impurities from water by reducing pollution through a thin physical barrier, a chemical process, or a biological process. Depending on your application or what you are trying to eliminate (bacteria, minerals, solids, etc.), there are different types of water filters. Each one addresses a different water problem, and many filters use a combination of these methods to obtain different levels of filtration.
1. Mechanical filters
The basic idea of mechanical filtration is to substantially remove sediments, dirt, or any particles in the water, using a barrier. A mechanical filter can be from a mesh to large debris filter to a ceramic filter that has an extremely complex pore structure for ultra-fine filtration of pathogenic organisms.
A filter that uses mechanical filtration will generally receive a micron rating that indicates how active the filter is in terms of the size of the particles it is capable of retaining.
2. Absorption Filters
The absorption in a water filter is carried out with different minerals, carbon being the most used since it is highly effective in capturing contaminants transported by water. The reason why carbon absorbs pollutants so quickly is that it has a large internal surface that is full of corners and cracks that can trap chemical impurities such as chlorine. The most common commercial water filters contain granular activated carbon (CAG), which reduces the unwanted taste and stinks.
4. Ion exchange filters
Ionic exchange is a process used to soften hard water by exchanging the magnesium and calcium ions found in hard water with other ions such as sodium or hydrogen. Ion exchange removes hard minerals, reduces lime scale, and makes the water suitable for applications where it is kept at a constant high temperature, such as in commercial coffee makers.
Ionic exchange is carried out in commercial filtration systems where an ion exchange resin comes typically in the form of small beads.A similar type of resin is used in some water softeners, and, in the case of a resin water softener that uses sodium ions, it needs to be recharged periodically to avoid being inoperative.Since water filters are generally sealed units, the filter should be replaced with a new one.
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