Effective filtration tools in different areas are usually complex, from a technical point of view, devices. A high degree of purification is achieved due to the multi-stage passage of the medium through several barriers, which allows achieving optimal filtration performance. Conversely, simple designs are quite justifiably associated with the surface disposal of liquid from undesirable elements. But there is a third category of cleaning systems, which is represented by a household reverse osmosis filter in almost all modifications. Its distinguishing feature is a combination of simple design and high degree of purification. Although the composition of such devices provides for several stages of water treatment, the principle of filtration is considered one of the simplest and most affordable for 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 microns in size - these may be rust particles, sand and other elements that are visible to the eye. In the next step, reverse osmosis water filters provide the absorber. Activated carbon, which incorporates chloride compounds, usually acts in this capacity.
It is important to note here that coal can be used in pressed or granular form. It is preferable to model with the first version of the layout of the absorber, since the granules release coal dust into the water. As it becomes contaminated, the pressed filler ceases to pass liquid, while dirty coal, especially in large fractions, reduces the quality of filtration, but continues to work. If the choice fell on a granular absorber, then it is advisable to purchase a reverse osmosis filter for treating drinking water with a fine fraction of coal. In this case, a high density of the substance will increase the cleaning effect.
Membrane Properties
The outer side of the membrane is represented by a surface with a selective layer responsible for the separation of pure water from impurities. A feature of this material is the presence of micropores, the sizes of which correspond to the 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 solvent properties, which allows it to prevent foreign bodies from being included in the composition. As a rule, filters with a reverse osmosis membrane are roll modules, including several cleaning barriers. Usually these are thin-layer composite layers that not only trap harmful elements, but can also impart fluid to beneficial substances.
Ionization and sterilization of water
The design of such devices is good not only by the principle of cleaning, but also by the possibility of supplementing the filtering with auxiliary functions. Although the membranes themselves provide considerable 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 make up for cleaning tasks. In addition, reverse osmosis water filters can be equipped with built-in ionizers, which provide the composition with useful substances. The equipment of such devices includes separation channels with flasks that separate the supply of purified water to ionized and ordinary. According to manufacturers, the enriched liquid can be used not only for domestic needs, but also for medical purposes.
Benefits of reverse osmosis filters
The main advantage of such systems is the efficiency of the main task - filtering. Further, it is worth noting the convenience in the content of the filters. They are characterized by high ergonomics, which is facilitated by the small dimensions of the device, and a simple design. In addition, filters reverse osmosis water purification allow you to get different characteristics of the composition. This is both demineralized and distilled, as well as ionized liquid, which can be used for different purposes.
Filter disadvantages
First of all, this is a high price and the absence of a number of useful minerals in the composition of the resulting water. As for the cost, the devices can not be called very expensive, but, compared to conventional jug models, they stand out noticeably in the direction of increasing the price tag. In terms of the lack of nutrients, the situation is ambiguous. The fact is that reverse osmosis filters for water are excluded from the composition along with harmful impurities calcium, fluorine, as well as salts necessary for the body. That is, the cleaning efficiency in this context acts even to the detriment, therefore it is necessary to make up for the lack of trace elements at the expense of other products. There is also a drawback in the form of excessive water consumption. Typically, filters trap an almost imperceptible volume of the filtered fluid, but the absorption system through reverse osmosis significantly increases this indicator.
Conclusion
At the present stage of the development of filtration facilities, there are not many truly effective systems that could provide multilateral cleaning. Especially when it comes to household devices that initially have less extensive capabilities compared to industrial units. At the same time, reverse osmosis water filters are an exception to the rule precisely due to high cleaning rates. Not only high-quality filtration from the main harmful substances is noted, but also the possibility of enriching the composition with ionizers. True, their widespread use is nevertheless hindered by their drawbacks. A considerable part of consumers are scared by the information that the resulting liquid is deprived of the main useful trace elements. However, while there is no unequivocal opinion of experts about how this nuance is dangerous to health.