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When choosing regeneration technologies for advanced treatment of wastewater, is often to prefer those that demand too much energy. This explains and justifies why the waste water often is often used for irrigation or other purposes which are relatively few "noble." Some membrane technologies for the treatment of salt water, are often used on islands or in places where there are too many resources, such as in coastal areas with its existing resources almost depleted. Also used in some special occasions where not issued the corresponding operating premises for some uses luxuries. Another example of its use are the golf courses and farms where the crop allows the necessary investment and continued maintenance of the plants.

In this connection, are emerging in several areas with safe water, a lot of mini-desalination plants. This phenomenon brings with it a disadvantage. It creates a serious problem, because pickles are removed abruptly. If these processes are launched, later reuse could be considered absolutely mandatory from the perspective of environmental sustainability.

It is important to clarify that the membrane technology for wastewater reclamation, should be used only in cases where the use of reclaimed water adduce the final value. They may also be used in cases where because of the high salt content of wastewater, membrane technologies are responsible to fulfill different tasks. For example, regeneration perform various compounds and also removing most of the microorganisms, while in charge of proper effluent desalination.

In the event that the reclaimed water if it aims to be used as drinking water, consider the reverse osmosis (membrane technology to which we refer as on other occasions) for treatment.

It is also justified the choice of membrane technologies for groundwater recharge with reclaimed water carried. It is very important to remember that in order for the reverse osmosis process correctly, is a good prerequisite previous treatment, such as an ultrafiltration or other similar.

The membrane technology used most often are the designated reverse osmosis, ultrafiltration, electrodialysis and reversible electrodesionización, microfiltration, and nanofiltration. In future articles, analyze them in detail.