Household reverse osmosis filters for water

Effective means of filtration in different spheres are usually complex, from a technical point of view, devices. A high degree of purification is achieved through a multistage passage of the medium through several barriers, which makes it possible to achieve optimum filtration rates. Conversely, simple designs are reasonably associated with surface disposal of liquid from undesirable elements. But there is also a third category of purification systems, which is represented by a reverse osmosis filter in practically all modifications. Its distinctive feature is the combination of a simple design and a high degree of purification. Although the composition of such devices provides for several stages of water treatment, the very principle of filtration is considered one of the simplest and most accessible to the mass consumer.

Filter device

Initial cleaning takes place in a cartridge made of polypropylene. At this stage, the liquid gets rid of mechanical impurities larger than 5 μm - these can be rust particles, sand and other elements that are visible to the eye. At the next stage, reverse osmosis water filters ensure the operation of the absorber. In this capacity, usually acts activated charcoal, which absorbs the chloride compounds.

It is important to note here that coal can be used in a compressed or granular form. The model with the first variant of the absorber arrangement is preferable, since the granules release coal dust into the water. As contamination, the pressed filler stops passing the liquid, while the dirty coal, especially in the coarse fraction, reduces the filtering quality, but continues to work. If the choice has fallen on a granular absorber, then it is more reasonable to purchase a reverse osmosis filter for purification of drinking water with a fine fraction of coal. In this case, a high density of matter will increase the cleaning effect.

Properties of membranes

The outer side of the membrane is represented by a surface with a selective layer responsible for separating clean water from impurities. A feature of this material is the presence of micropores, the dimensions of which correspond to molecules of substances contained in water. Due to the selective surface, the membrane forms bundles of water molecules, in which special characteristics are noted. In particular, such water is characterized by low qualities of the solvent, which allows it not to admit foreign bodies into the composition. As a rule, reverse osmosis membrane filters are roll modules, which include several cleaning barriers. Usually these are thin-layer composite layers that not only trap harmful elements, but can also provide liquid with useful substances.

Ionization and sterilization of water

The design of such devices is good not only for the cleaning principle, but also for the possibility of supplementing filtering with auxiliary functions. Although membranes in themselves provide a significant water treatment efficiency, some manufacturers supplement them with ultraviolet sterilization. This device by and large duplicates the work of the main membrane, but in case of damage it can completely fill the cleaning tasks. In addition, reverse osmosis filters for water can be supplied with built-in ionizers, which provide the composition with useful substances. In equipping these devices are dividing channels with flasks, separating the supply of purified water to ionized and conventional. As the producers note, the enriched liquid can be used not only for domestic needs, but also for medical purposes.

Advantages of reverse-osmosis filters

The main advantage of such systems is the efficiency of the main task - filtration. Further it is worth noting the convenience in the content of filters. They are distinguished by high ergonomics, which is facilitated by both small dimensions of the device and a simple design. In addition, reverse osmosis water purification filters allow different compositions to be obtained. This is demineralized, and distilled, as well as ionized liquid, which can be used for different purposes.

Disadvantages of filters

First of all, this is a high price and the lack of a whole range of useful minerals in the composition of the water. As for the cost, the machines can not be called very expensive, but, in comparison with the usual pitcher models, they stand out in the direction of price increase. In terms of lack of nutrients, the situation is mixed. The matter is that reverse osmosis filters for water exclude calcium, fluorine, and also salts necessary for an organism from structure together with harmful admixtures. That is, the effectiveness of cleaning in this context is even harmful, so you have to fill the lack of trace elements at the expense of other products. There is also a shortage in the form of excessive water consumption. Usually, the filters retain an almost imperceptible volume of the filtered liquid, but the absorption system through reverse osmosis significantly increases this figure.

Conclusion

At the present stage of the development of filtration media, there are not so many truly effective systems that could provide multilateral cleanup. Especially if we are talking about household devices, which initially have less capacity than in industrial units. In this case, reverse osmosis water filters are an exception to the rule due to the high purification indexes. It is noted not only high-quality filtration from the main harmful substances, but also the possibility of enriching the composition at the expense of ionizers. True, the wide distribution of such filters is still hampered by their shortcomings. A considerable part of consumers are frightened by information that the received liquid is deprived of the basic useful microelements. However, while there is no unequivocal opinion of experts on how this nuance is dangerous to health.