Reverse osmosis and 100% pure and safe water

‘Reverse osmosis’ is the terminology that rules many a lips these days with reverse osmosis water purifiers being one of the most used systems in Indian households. There are many who still do not know about the working method except that it is a purification mechanism. And there are also many who are not aware that reverse osmosis filtration is recommended in areas where TDS levels are high. Buy a home water purifier of reverse osmosis filtration only after getting your tap water tested and only if the report carries a recommendation of the same. Otherwise in case TDS levels are low and if you need some other filtration mechanism, you cannot get pure water from the RO faucet.

Demineralization of water involving use of a semi permeable membrane at high pressure is termed reverse osmosis. Pure H2O flows through the membrane of the RO home water purifier but salts and other dissolved substances don’t; these are left behind and flushed out. The process is reversed by overcoming the osmotic pressure equilibrium across the membrane. Pressure of water is intensified on the salty side of the membrane and thereby water is forced across. Concentration of salt and dissolved substances determines the amount of pressure. During the purification process water is forced out and the salt concentration increases. Greater pressure is then required to get more pure content.

Pre-treatments are a must for reverse osmosis filtration systems. Configurations vary from purifier to purifier. Use of pre-treatment ensures the lowest rate of membrane plugging. Getting rid of hardness of the water, elimination of suspended solids (slit), chlorine and other oxidizers not to mention new age tough contaminants happen with the pre-filters incorporated in RO water purifiers. Many a home purifier comes with post taste enhancers, enhancing the taste of water after it passes through the membrane. If your reverse osmosis filtration system comes equipped with a CTA membrane, you hardly need to remove chlorine content in the incoming water but for TFC membrane, chlorine must be removed. Membranes are sensitive to chlorine and other oxidizers. Use of carbon filters facilitates filtering of chlorine. So, when you buy a home water purifier of RO mechanism, ensure that multi-stage purification involving use of multiple filter cartridges other than the key membrane is applied. It is then that you can assure yourself of drinking water that is 100% pure and safe and lead a healthy life.

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