The treatment of water via water filters is not too complicated; however, it is nowadays essential equipment of most households as the quality of water supplied by utility agencies degrades because of contamination. When you read about how water filters work, you might be surprised to know that most of them have been around for quite some time. As an example, among the commonest water treatment technologies is using a carbon filter fitted within a housing unit that traps contaminants when water goes through it. Such filters are also known as gravity filters, as the force of gravity pulls down the contaminated water from the top container via a filter containing activated carbon to the bottom receptacle that contains a tap from which purified water is withdrawn.
There are many other kinds of water treatment techniques such as distillation and reverse osmosis. Two filters are employed in the reverse osmosis process and pressured water flows through solutions. In the distillation system, the water is boiled, after which a glass pipe condenses the water vapor, depositing pure water in the collection chamber. The contaminants remain behind in the container in which the water was boiled.
Filters using UV light
The latest generation of water filters employs ultraviolet light. They come in two different types: The first type reduces the percentage of bacteria from the water and the second type purifies the water. Many people make the mistake of considering water softeners to be purifiers. This is a wrong concept, as these systems only convert hard water into soft by removing minerals from it. They can neither purify the water or remove bacteria from it.
Advantages and disadvantages of different types of water filters
All systems have their own advantages and disadvantages, therefore it is difficult to call any one of them perfect. Let us take the charcoal filters for example. While they do a pretty good job of removing small particulates of contaminants, they do not eliminate bacteria completely, plus they take a lot of time to filter water and are hence good for small families. If you are looking for instant water filters, then the ultraviolet system is the best for you, but they leave an unpleasant smell in the water. You might not be aware of it, but many reverse osmosis filters also use activated carbon as a pretreatment process to reduce quite a percentage of chlorine, organic contaminants, and other contaminants that could damage the reverse osmosis membrane. Carbon block filters, measuring 0.5 microns are commonly used to remove cysts like cryptosporidium and giardia.