| Procedure: |
| Reverse osmosis is comparable to an extreme, fine filtration and therefore is also known as hyperfiltration. |
| In reverse osmosis, water is pressed through a membrane, where only molecules with a certain size fit through, under compulsion. |
| Suspended substances, pigments, colloids, organic compounds, viruses and bacteria are abstracted from the water during the process. |
| The process is called reverse osmosis because pressure is required to press water through the membrane and therefore cleaning it from contamination. |
| Pressure up to 100 bar is used. |
| Through reverse osmosis it is possible to remove 95% - 99% of dissolved solid materials and 99% of bacteria. Therefore safe and clean water is produced. |
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| Use: |
| Currently reverse-osmosis-equipments cover various ranges of performance. |
| Equipments with a reverse-osmosis-module of a few liters per hour for domestic- or laboratory-use to seawater-desalination plants with a capacity of a few hundred cubic meters per hour are in service. |
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| Disadvantages: |
| - vital minerals are detracted from the filtered water |
| - membranes are strong culture mediums for microorganisms |
- for producing one liter of pure water normally 3 – 25 liters of water are
required
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©2005 WaterVitt |
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