RO - Reverse Osmosis Technology
Reverse Osmosis (RO) is a technology that is used to remove a majority of contaminants from water by pushing the water under pressure through a semi-permeable membrane.
To understand the process of reverse osmosis you must first understand the natural process of Osmosis. Osmosis is actually a naturally occurring phenomenon and an important procedure in nature. So this is how it goes, a weaker saline solution will tend to migrate to a stronger saline solution. Just like the roots of a plant absorb water from the soil or our kidneys absorb water from our blood.
If you take a container full of water with low salt and another container with a higher salt concentration and if they are separated by a semi-permeable membrane, then the water with the low salt concentration begins to migrate towards the water container with the higher salt concentration.
Reverse Osmosis as the names suggests, it is a process of Osmosis in reverse. Whereas Osmosis occurs naturally without energy required, to reverse the process of osmosis you need to apply energy to the more saline solution. A reverse osmosis membrane is a semi-permeable membrane that allows the passage of water molecules but not the dissolved salts, organics, bacteria and pyrogens. However, you need to ‘push’ the water through the reverse osmosis membrane by applying pressure that is greater than the naturally occurring osmotic pressure in order to deionize water in the process, allowing pure water through while holding back a majority of contaminants.
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 of dissolved salts behind in the reject stream. The amount of pressure needed is dependent 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 water streams that carries pure water is called permeate water. The water stream that carries the concentrated contaminants that did not pass through the RO membrane is called the reject stream.
As the feed water enters the RO membrane the water molecules pass through the membrane and the salts and other contaminants are not allowed to pass and are allowed to pass and are discharged to drains. The water that makes it through the RO membrane is treated and pure now and usually have around 95% to 99% of the dissolved salts removed from it.
Reverse Osmosis can remove up to 95% of the dissolved salts (ions), organics, bacteria, viruses, pathogens and other micro particles from the water. RO is very efficient when it comes to treating surface and groundwater.
A main drawback of RO technology is that it wastes lot of water .Conventional RO purifiers make 30 % of pure water and 70 % water is wasted.
To address these concerns of wastage of water, Ion Exchange has come out with innovative technology and launched the world's first High Recovery water purifier under its flagship brand.
Zero B called the "Eco RO". The product is energy efficient and environment friendly, saves more than 80% of water.
Zero B Eco RO make 70% of pure water and rejects only 30 % water.