What is Reverse Osmosis?

It is the phenomenon of water flow through a semi permeable membrane that blocks the transport of salts or other solutes through it. Osmosis is a fundamental effect in all biological systems. It is applied to water purification and desalination, waste material treatment, and many other chemical and biochemical laboratory and industrial processes.

When two water (or other solvent) volumes are separated by a semi permeable membrane, water will flow from the side of low solute concentration, to the side of high solute concentration. The flow may be stopped, or even reversed by applying external pressure on the side of higher concentration. In such a case the phenomenon is called reverse osmosis.

It is a process which removes both dissolved organics and salts.RO removes most organic compounds and up to 99% of all ions. A selection of RO membranes can be used to treat different feedwater scenarios.It is much cheaper than most conventional treatment systems today.

How does Reverse Osmosis work?

Reverse osmosis is only one stage of a typical R.O. system. Sediment and carbon filtration is normally included with an R.O. system, with each stage of filtration contributing to the purification process.

  • The first stage of filtration is the sediment filter, which reduces suspended particles such as dirt, dust, and rust.
  • The second stage of filtration is the carbon filter, or filters which reduce volatile organic chemicals, chlorine, and other taste and odor causing compounds.
  • The heart of Reverse Osmosis is the membrane. It is responsible for rejecting up to 98% of the total dissolved solids in the water. This is where the purification takes place.

How does Reverse Osmosis differ from a Water Filter?

Ordinary water filters use a screen to separate only particles of dirt sediment from water. Reverse osmosis employs a semipermeable membrane that removes not only particles but also an extremely high percentage of dissolved contaminants-molecule by molecule- from raw tap water.

What is the membrane and how does it work?

The membrane consists of several thin layers or sheets of film that are bonded together and rolled in a spiral configuration around a plastic tub (This is also known as a thin film composite or TFC membrane.) The material of the membrane is semipermeable: it allows water molecules pass through while acting as a barrier to dissolved solids (i.e.: mineral chemical contaminants). When the feed water stream passes across the surface of the membrane, the PurePro molecules penetrate the membrane surface, working their way around the spiral and collecting in the center tube. The remaining contaminants are concentrated and washed from the surface of the membrane down the drain.