Water is important for life and one of the essential elements for human existence. Although in modern era misuse of water body, growing population, industrialization, environmental degradation has polluted the water, as a result installing the water purifier has become our necessity. The most common techniques for water purification is Ro or Reverse Osmosis. For most people water purifier means Ro, but do we really need RO technology to purify our water. Before we begin let’s understand Ro.
What is Reverse Osmosis ?
RO is a powerful technology which can purify the most contaminated even salty water in just one go. Eenadu system water passes under high pressure through a semi permeable membrane with a pore diameter of 0.0001 macron. This allows only water molecules to pass through and with such minute filteration 90% of the impurities, heavy metals, microorganism, and even minerals removed and you got a pure, sweet and transparent water which is also devoid of important minerals.
Drinking Ro water is just like drinking water less water because all the necessary mineral were already removed from it. We need to understand that RO is a phenomenal technology which was actually developed mainly for marines so that they can readily purify salt water from sea and to drink it. RO was basically meant for survival not everyday usage. Since RO reduces the hardness of water by 90% it also bring the TDS below 100 which is non-ideal.
TDS – TDS means Total Dissolved Solids is the measure of dissolved minerals, salts, metals and impurities from the water, as TDS also include natural occurring minerals like calcium, phosphorus, potassium one thing is very clear is that lower the TDS better the water is not true, which is generally claimed by every RO water purifier brands. According to the Bureau of Indian Standards (BIS), the upper limit of TDS level in water is 500 ppm. The TDS level recommended by WHO, however, is 300 ppm. This means water which supplies by the government has TDS of somewhere around 300 which is very good for your health.
- TDS greater than 500 in non ideal for drinking and it is also known as hard water.
- TDS under 300-500 in acceptable to drink.
- TDS between 100-300 is ideal.
- TDS lower than 100 is non ideal and often called as demineralised water. RO water falls under this range.
Majority of RO water has a TDS level of only 15-30.
So what to do ?
You just need to purchase a good TDS meter and after that just check the TDS of your tap water and if your tap water has TDS under 500 you don’t need any RO water purifier system to purify your water. Believe me majority of the tap water has TDS less than 500.
Which filter to choose
- TDS 300-500 :- You need to go for a UF + UV water purifier.
- TDS 300-900 :- You need install NF technology with UV.
- TDS 900 and above :- RO System as you have no choice.
NF :- Nano Filtration uses the similar principles of RO but with the small difference that its pore size is 0.001 macron. Obviously it is able to remove less impurities from Ro but unlike RO it does not change the taste of water.
UV :- In this process water passes through UV chamber then the UV kills the tiniest of macro organisms and viruses from water making it best for consumption.
UF :- Ultra Filtration is a technology which filters the water without using electricity. In this process the water purify through a hollow fibre membrane with pore size of 0.01 macron, through Ulta Filteration we can remove the impurities from the water without changing natural mineral content.
Note:- Nowadays many companies started making UV water purifier with aluminium chambers in it, not with food grade stainless steel simply to earn more profits as aluminium is cheaper. But the problem with aluminium is it releases aluminium oxide which uses to damage your brain. So, please check twice before purchasing.
TDS Meter :- When companies came to know that people are getting aware of the fact that RO gives very low TDS water they came up with a concept of TDS controller. TDS meter is just a bypass valve and it does is that it mixes a part of very low purify RO water with a normal tap water and finally you get a high TDS water. What really is the point of this.