Effective filtration tools in various fields 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 makes it possible to achieve optimal filtration performance. Conversely, simple designs are justifiably associated with the superficial disposal of fluid from unwanted 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 characteristic 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 filtration principle itself 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 microns - these can be rust particles, sand and other elements that are visible to the eye. At the next stagereverse osmosis water filters provide absorber operation. Activated carbon usually acts in this capacity, which absorbs chloride compounds.
It is important to note here that coal can be used in pressed or granular form. The model with the first absorber layout option is preferable, since the granules release coal dust into the water. As it gets dirty, the pressed filler stops passing liquid, while dirty coal, especially in a large fraction, reduces the quality of filtration, but continues to work. If the choice fell on a granular absorber, then it is more expedient to purchase a reverse osmosis filter for drinking water purification with a fine coal fraction. In this case, the 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 separating 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, which have special characteristics. In particular, such water is characterized by low solvent qualities, which allows it to prevent foreign bodies from entering the composition. As a rule, filters with a reverse osmosis membrane are rolled modules that include several purification barriers. Usually these are thin-layer composite layers, which not only delayharmful elements, but can also endow the liquid with useful 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 filtration with auxiliary functions. Although the membranes themselves provide considerable water treatment efficiency, some manufacturers supplement them with ultraviolet sterilization agents. By and large, this device duplicates the work of the main membrane, but if it is damaged, it can completely compensate for the 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 dividing channels with flasks that separate the supply of purified water into ionized and ordinary. As the manufacturers 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 - filtering. Next, it is worth noting the convenience in the content of filters. They are distinguished by high ergonomics, which is facilitated by both the small dimensions of the device and the simple design. In addition, reverse osmosis water purification filters make it possible to obtain compositions of different characteristics. It is both demineralized and distilled, as well as ionized liquid, whichcan be used for different purposes.
Disadvantages of filters
First of all, this is a high price and the absence of a number of useful minerals in the resulting water. As for the cost, the devices cannot 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 useful substances, the situation is ambiguous. The fact is that reverse osmosis water filters are excluded from the composition, along with harmful impurities, calcium, fluorine, as well as s alts necessary for the body. That is, the cleaning efficiency in this context even acts to the detriment, so you have to make up for the lack of microelements at the expense of other products. There is also a disadvantage in the form of excessive water consumption. Normally, filters retain an almost imperceptible volume of filtered liquid, but the absorption system through reverse osmosis significantly increases this figure.
Conclusion
At the current stage of development of filtration media, there are not many truly effective systems that could provide multilateral cleaning. Especially when it comes to household devices, which initially have less broad capabilities compared to industrial units. At the same time, reverse osmosis water filters are an exception to the rule due to their high purification rates. Not only high-quality filtration from the main harmful substances is noted, but also the possibility of enriching the composition due to ionizers. Truth,However, their shortcomings prevent the wide distribution of such filters. A considerable part of consumers are frightened by the information that the resulting liquid is deprived of the main beneficial trace elements. However, while there is no unequivocal opinion of experts about how dangerous this nuance is to he alth.
