Reverse Osmosis (RO)
An RO purifier makes use of a thin permeable membrane through which unfiltered water molecules are pushed. The molecules move from a high region of high solute concentration to lower solute concentration and leaves the impurities behind. But this method is not suitable for killing microbes and bacteria. Hence, RO filters are usually clubbed with UV filters.
Ultraviolet (UV)Ultraviolet filtration makes use of ultraviolet rays to kill germs and microbes. Along with other filtration techniques, it gives bacteria and virus free water. It is usually clubbed with RO filtration technology where water is passed through a UV filter after going through the RO process.
Ultrafiltration (UF)Ultrafiltration is similar to reverse osmosis but it filters out larger particles up to the size of 0.01 micron. Smaller particles are removed with the help of reverse osmosis. Microfiltration (MF) is usually clubbed with UF & RO to remove particles up to the size of 0.1 microns.
Activated CarbonIf the water has dissolved solids, then activated carbon filters can help weed out such granules. These filters also help in removing funny taste and odour from water.
If you’re looking for a water purifier, pick one with most of the above-mentioned water filtration technology. Check out our Water Purifier Buying Guide. It is quite helpful to take various factors into consideration before making a purifier purchase.
Like this story? Also read: Water purifier buying guide
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