Question

What is reverse osmosis?
How does the reverse osmosis works?
A well labeled diagram of reverse osmosis.
Comparison of mineral water and reverse osmosis
(long answer )

Answer 1

Reverse Osmosis is a technology that is used to remove a large majority of contaminants from water by pushing the water under pressure through a semi-permeable membrane.

Working of Reverse Osmosis

Reverse Osmosis works by using a high pressure pump to increase the pressure on the salt side of the RO and force the water across the semi-permeable RO membrane, leaving almost all (around 95% to 99%) of dissolved salts behind in the reject stream. The amount of pressure required depends on the salt concentration of the feed water. The more concentrated the feed water, the more pressure is required to overcome the osmotic pressure.

The desalinated water that is demineralized or deionized, is called permeate (or product) water. The water stream that carries the concentrated contaminants that did not pass through the RO membrane is called the reject (or concentrate) stream.

Mineral Water v/s RO water

In mineral water, essential minerals are added after filtration and in RO water purifier minerals are retained by using TDS controller (which is patented technology of Kent), TDS Regulator ( Eureka Forbes) etc.

Here point to note is that in RO water purifiers minerals are retained not added from outside. I did research on Kent TdS controller technology and I found after filtration raw water in much lesser amount is added which further increases the concentration of minerals then again water is passed through UV chamber to remove all kind of micro bacterial impurities.

That took a lot of time..Hope it turns out to be helpful :)

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