Reverse Osmosis

Reverse osmosis is a scientific application where dissolved contaminants in water are physically removed by passing it under pressure through a special membrane. The process is similar to the way your body's cells absorb water. Reverse osmosis will remove up to 98% of dissolved contaminants such as; minerals, salts, metals and organic matter that may be present in a water supply.

Pores in the reverse osmosis membrane are so small that only water molecules pass through. The comtaminants are rejected and drained away. A comparison of molecular size to the pore size of the reverse osmosis membrane is shown to the right.


Approximate Rejection Rates Of Various Impurities


DISSOLVED SOLIDS REMOVAL PERCENT (%) DISSOLVED SOLID REMOVAL PERCENT (%)

Aluminium 99 Magnesium 99

Bacteria 99 Manganese 99

Barium 92 Mercury 97

Bicarbonate 98 Nitrate 97

Bromide 96 Organic Pesticides 99

Cadmium 98 Phosphate 99

Calcium 98 Polyphosphate 99

Chloride 98 Pottasium 98

Copper 99 Radium 98

Cyanide 96 Silica 98

Detergents 99 Silicate 98

Fluoride 98 Sodium 96

Iron 99 Sulfate 99

Lead 99 Zinc 99