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While many times have you wanted to label as a process of osmosis filtration on a molecular scale is easy to understand and realize that reverse osmosis is a process clearly differentiated from the micro filtration or filtration.

There are three aspects which indicate clearly that this difference:
1. In the process of filtering the entire flow passes through the separator element. This only prevents the passage of solid particles of a predetermined size.
2. By contrast, reverse osmosis, only a portion of the feed rate through the membrane and constitutes the product. The remaining flow is discharged without passing through the membrane and becomes the rejection.
3. In reverse osmosis, never separated material accumulates on the surface of the membrane, as occurs in other processes, as is the rejection which is responsible for the drag of the material.
4. While the osmosis seawater flow is parallel to the membrane, filtration is perpendicular.

In a way, it could be reverse osmosis as an offshoot of the ultra filtration, in which particles of colloidal dimensions are separated from the dispersed systems, running them through a suitable membrane or a filter. However, there are also significant differences between reverse osmosis and ultrafiltration.

In the ultra filtration, how the separation is achieved can be read as if it were a screening of particles passing through a film or matrix has pores of appropriate size. But the separation of salt water can not be reduced in such a simple process. It is much more complex, since there is no significant difference between the size of water molecules and the size of most inorganic ions involved. Some advantages of reverse osmosis to other conventional water treatment:
1. Technology used is first rate. It says "Fair treatment" achieved practically disappear because the use of chemicals in the process.
2. It is important reduce costs within the transaction.
3. Production in automated systems. The measurements are much more controlled and more reliable. Spaces are limited and flows and qualities remain constant.
4. And the most precious advantage: it adapts to all types of applications: waste water, process water, Pure Drinking, Health, Biological, and so on.