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.