AquaSafe of Cape Cod

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How Reverse Osmosis Works to Purify your Water

AquaSafe’s filtration systems use a scientific method called reverse osmosis to remove pollutants and contaminants from water. In addition to being an effective method of purification, reverse osmosis is a reliable way to produce significant quantities of purified water.

In reverse osmosis, pressurized water is passed through a semi-permeable membrane. This membrane is made of a thin-film composite material with microscopic openings that allow water molecules, but not larger compounds, to pass through. The water passes through the membrane, while contaminants are trapped and remain behind.

Reverse osmosis is capable of filtering out bacteria, salts, proteins, particles and other materials that have a molecular size of greater than 1/10,000th of a micron. That is just barely larger than a single molecule — far smaller than the human eye can see!

Reverse osmosis systems use a process known as crossflow that allows the membrane to continually clean itself. As some of the water passes through the membrane the rest continues downstream, sweeping the blocked materials away from the membrane.