Ultrafiltration and reverse osmosis are two common water purification technologies, with significant differences in filtration accuracy. Filtration accuracy of ultrafiltration
The filtration accuracy of ultrafiltration membranes is usually between 0.001 and 0.1 micrometers, and there are also claims that their filtration accuracy is 0.01 micrometers. This filtration accuracy is sufficient to remove harmful substances such as suspended solids, colloids, bacteria, and large organic molecules in water, while retaining some of the original minerals and trace elements in the water. The ultrafiltration water purifier adopts a pure physical filtration method, using water pressure difference to pass water through the micropores of the ultrafiltration membrane, achieving efficient filtration of impurities and pollutants in water. Filtration accuracy of reverse osmosis
The filtration accuracy of reverse osmosis membrane is as high as 0.0001 microns, which far exceeds that of ultrafiltration membrane. Reverse osmosis membranes can completely remove impurities such as bacteria, residual chlorine, colloids, organic matter, pesticides, inorganic salts, heavy metals, etc. from water, even small viruses (with a diameter of about 0.2 microns) cannot pass through. The water treated with reverse osmosis membrane can meet the direct drinking standard and is pure water without minerals and trace elements. summarize
|Water purification technology | filtration accuracy | removal of substances | retention of substances|
| --- | --- | --- | --- |
|Ultrafiltration | 0.001 to 0.1 micrometers (usually 0.01 micrometers) | Suspended solids, colloids, bacteria, macromolecular organic compounds, etc. | Some minerals and trace elements|
|Reverse osmosis | 0.0001 microns | Bacteria, residual chlorine, colloids, organic matter, pesticides, inorganic salts, heavy metals, etc. | None (pure water)|
Reverse osmosis water purifiers have much higher filtration accuracy than ultrafiltration water purifiers, which can remove more types of impurities and pollutants, but also remove minerals and trace elements from water. The ultrafiltration water purifier can retain some beneficial minerals and trace elements for the human body while ensuring water quality safety. When choosing a water purifier, consumers can decide which technology to use based on their own needs and local water quality conditions.