Reverse Osmosis Water Purification

reverse osmosis water purification

Reverse osmosis water purification system improves the quality of your drinking water.

It’s the most effective process in eliminating or substantially reducing most types of contaminates found in tap water. It is a process free of chemicals and electricity and is used by leading bottled water companies all around the world to produce high quality, purified water.

When utilizing a multi-stage water purification system, this technology forces water through filters with semi-permeable membranes- trapping unwanted substances such as sodium and lead on one side and pushing the uncontaminated water to the other. A storage tank is used for the purified water, which is kept under the sink. Your fresh purified water is then dispensed through a designer spout placed near the faucet.

A Reverse Osmosis unit will produce clear, fresh tasting drinking water and can be customized for any size household. You will never have to buy bottled water again.

How does Reverse Osmosis work?

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.

As the feed water enters the RO membrane under pressure (enough pressure to overcome osmotic pressure) the water molecules pass through the semi-permeable membrane and the salts and other contaminants are not allowed to pass and are discharged through the reject stream (also known as the concentrate or brine stream), which goes to drain or can be fed back into the feed water supply in some circumstances to be recycled through the RO system to save water. The water that makes it through the RO membrane is called permeate or product water and usually has around 95% to 99% of the dissolved salts removed from it.

It is important to understand that an RO system employs cross filtration rather than standard filtration where the contaminants are collected within the filter media. With cross filtration, the solution passes through the filter, or crosses the filter, with two outlets: the filtered water goes one way and the contaminated water goes another way. To avoid build up of contaminants, cross flow filtration allows water to sweep away contaminant build up and also allow enough turbulence to keep the membrane surface clean.