Bella Aqua Stage 3 RO Membrane

STAGE 3: REVERSE OSMOSIS WATER FILTER

This is the most important stage of the reverse osmosis water filtration process. Water is forced through a tightly woven, semipermeable reverse osmosis membrane, filtering it from 1 micron to 0.0005 microns.

A reverse osmosis membrane is a thin film composite (TFC) membrane made of several polyamide layers. It allows only water molecules to pass through while rejecting dissolved salts, minerals, and other impurities. The process works by applying pressure to force water through the membrane, which is smaller than the impurities, so they get trapped on one side while pure water flows through to the other side.

The reverse osmosis membrane can effectively remove a wide range of impurities and contaminants, such as:

• dissolved salts, including sodium, calcium, and magnesium
• heavy metals such as lead, mercury, 
• bacteria, viruses, and microorganisms
• fluoride, chlorine and chloramines
• pesticides, herbicides, and other dissolved organic compounds