Reverse osmosis does not eliminate all the salts contained in the water, however, it considerably reduces the ions, bacteria, viruses and organic compounds that it contains and eliminates “More than 95% of organic compounds and pesticides. More than 90% of dissolved salts such as sodium, calcium, carbonates, arsenic, bicarbonates, magnesium, aluminum, phosphates, fluorine, cyanide, sulfate, copper, nickel, zinc, silver, barium, radium, chlorine, nitrates. Between 55% and 65% of boron (these values are approximate and may vary depending on the type of membrane, manufacturer and equipment designs, and working pressure and/or process conditions)”.
This process forces the water to circulate through a semi-permeable membrane to filter exclusively pure water. Its molecule is so small that it is the only one capable of passing through the pores of the membrane, therefore, it almost completely eliminates “nitrates, pesticides, bacteria, viruses, microbes, asbestos, herbicides, lime, mercury, lead and others.” heavy metals, as well as everything that is dissolved. The reverse osmosis membrane allows for the greatest filtration; no other filter reaches this level.”
Image by Academia.edu
Advantages and disadvantages
- Improves the taste. If your process is for human consumption, this application is ideal.
- Easy maintenance.
- Eliminates impurities.
- Does not require chemicals.
- Membranes are low cost and easy to install.
- Does not remove chemicals such as pesticides and solvents. Nor does it do without dissolved gases such as radon and trihalomethanes.
- A large volume of water is wasted.
- Cost. The installed equipment is very sophisticated and requires a high investment.
- Deterioration of the membrane and short-term maintenance. If the rehabilitation is not carried out, poor quality water is produced, so hard water can damage more quickly and an extra process (water softener) must be installed.
- Microorganisms. They tend to damage the membranes and if it is not filtered correctly the process is contaminated.