With increasing population, advancement in technology, and industrial revolution water pollution is increasing. Consuming water directly is highly unsafe. In order to remain healthy, we need to consume purified water.
With increasing awareness of safe water and its advantages, demand for water purifiers has also increased. It is bewildering to decide the best water purifier as there are is a range of purifiers available in the market. Every company is trying to provide the best experience to consumers by launching stylish and smart products having advanced technologies in order to ensure safe drinking water. In every water purifier, RO technology is used. Let us understand how RO water purifiers work.
What is Reverse Osmosis?
To understand reverse osmosis we first need to understand What is Osmosis?
Osmosis is the movement of water from an area of lower concentration of solute to a higher concentration of solute when separated by a semipermeable membrane. Using the concept of osmosis, the concept of reverse osmosis (RO) was devised and now it is the most common process used in water purifiers.
Reverse Osmosis as name defines, it is opposite process of osmosis. In this process water from higher concentration moves to lower concentration under external pressure against its natural tendency through a semipermeable membrane. This process has many applications like one of the most popular and common application is the purification of drinking water, removal of salts from water etc.
Semipermeable membrane is a membrane which allows only some particles to pass through it based upon their sizes and the most important feature of it is that it allows the flow of water only in one direction.
Why RO Water Purifier?
RO Water purifier is used to discard chemical water contaminants present in the water. Chemical contaminants can be TDS (Total Dissolved salts), molecules, bacteria, ions etc. TDS is only decreased by RO process, other processes like UV and UF are effective for biological contaminants whereas pre-filtration techniques are effective for physical contaminants.
RO system is effective enough to decrease the TDS by 99% in water. In Reverse osmosis process, about 20-30% of pure water is obtained and 70-80% water is contaminated so that is drained out. RO treated water is slightly acidic as its pH level is below 7.
RO water purifier can remove all type of contaminants from water. If you are from an area of having water with high TDS, then RO Water PUrifiers are best purifiers to be installed in the home. These purifiers are effective in treating underground water, borewell water and, municipal water etc.
RO Water Purifier Structure.
Sediment filtration process is the first stage in water purification. The sediment filter is used to separate the physical contaminants in the water. Physical contaminants are mud, dirt, suspended materials etc.
Activated Carbon Filter
Once the water is passed through the activated carbon filter, carbon filtration process removes biological contaminants in water. These contaminants can be bacteria, viruses, protozoan, and parasites. This carbon filter is also responsible for removing the chlorine from water as chlorine can damage RO membranes.
RO Membrane is a Semipermeable membrane which allows only some particles to pass through it based upon their sizes and the most important feature of it is that it allows the flow of water only in one direction.It removes alomost all the contaminants.
Post Carbon Filter
In this stage, water is treated for odor and taste. In RO treated water, there is some essential minerals are removed or flushed out in the process. So, to provide safe water having essential minerals now water purifiers comes with mineralz technology which put back the minerals at the end of the process.
RO water purifiers have two outlets. One outlet is for pure drinking water which gets filtered inside and another one is to cater to the elimination of the impure water which has been separated from the water.
You might be wondering for which areas RO water purifier is suitable. So let me take the pain to solve this puzzle for you.
Water Below 200mg/L TDS doesn’t need RO Water Purifier as RO treatment leads to water having low mineral content which is not safe for drinking as many essential minerals are eliminated from the water. This is because water with 200mg/L TDS have less than 70mg/L of Calcium and Magnesium and these both minerals are very essential for the body. Reason to avoid RO Water Purifier in low TDS areas is that around 70-78% water is wasted into RO Water Purifiers.
Water between 200mg/L – 500mg/L, RO Water Purifiers are not recommended until a doctor prescribes it or until the water is hard having Calcium and Magnesium greater than 200mg/L.
RO Water Purifiers is recommended for areas have TDS level greater than 500mg\L in water.
Types of RO Water Purifiers
There are two types of water purifiers:
- Wall Mounted RO Water Purifier
- Undersink RO Water Purifier
Advantages of RO Water Purifier
- Reverse Osmosis Water Purifier is best for treating water having the high level of TDS.
- Reverse Osmosis Water Purifier can remove heavy metals like lead, mercury etc. very effectively.
- RO Technology is best for treating tap, borewell and public water.
Disadvantages of RO Water Purifier
- The biggest disadvantages of RO Water Purifier is that it removes the natural minerals like magnesium, calcium, iron, sodium from the water. Advanced water purifiers use mineralz technology which adds the essential minerals to the water at end of process to provide safe drinking water.
- Due to the removal of natural minerals from the water, water gets de-mineralized and become tasteless.
- About 70-80% of water is wasted and catered in the process.