We don’t get pure drinking water these days as it is contaminated with chemicals, minerals and many other impurities that are bad for health. There are bacteria and other microscopic organisms present in the water that can cause serious danger to health. To make water pure for consumption, we make use of water purifiers. These purifiers make use of various technologies like RO (Reverse Osmosis) and UV (Ultra Violet).
All the players in the market claim to have the best RO and UV water purifiers in India, but you should understand the difference between the two technologies before taking a call.
The UV purifier removes the bacteria or other microorganisms using the multiple UV-infused columns. It, however, lacks the ability to fully eliminate chemicals that are present in the water. To provide complete purification, the manufacturers of these purifiers use RO and UF (Ultra-Filtration) techniques along with UV.
How Do the Two Technologies Work?
RO System: It makes use of reverse osmosis technique, wherein a solvent is made to pass through a porous membrane in a direction opposite to that of natural osmosis when exposed to a hydrostatic pressure higher than the osmotic pressure. This is thus the opposite of osmosis process and hence the name. The pressure of the incoming water is used to push against the membrane, where the water molecules pass through leaving behind bigger particles, which are basically the dissolved solids and other impurities.
Ultra Violet System: Here, UV rays are used to kill the harmful microbes, thereby reducing the chances of contacting waterborne diseases. When water passes through this UV source, the rays penetrate through the DNA of the bacteria present in the water destroying their ability to reproduce and hence making them ineffective.
Differences between RO and UV
Few of the marked differences between the two technologies are:
- While RO is capable of removing the dissolved salts, the same is not possible in UV purifier.
- As the water converts from hard to soft in RO, both its colour and taste improve.
- When it comes to wastage, a lot of waste water is produced by RO purifier, while there is no wastage in UV filter.
- RO technology is more expensive than UV.
- The purification cycle in RO takes much more time than that taken by a UV purifier.
- RO removes the dissolved solids from water, but the chances of reducing the bacteria are less, though the ones it kills are removed completely from the water. The UV purifier completely kills them, but the dead bodies are still present in the water.
- RO uses electricity to boost the water pressure, while UV can work fine with normal water pressure running in the taps.
Whether you should opt for RO or UV water purifiers should be dependent on the quality of water that you get in your home. Technologically, RO is better, but again you need to make the decision based on whether the water you get at your home has more of dissolved salts or micro-organisms. For someone getting high TDS water, RO is definitely a better choice; otherwise go for a UV purifier.