Today, various companies produce compact, easy-to-use ultrafiltration or industrial Ro plant cartridges, which are not inferior to UV lamps in terms of disinfection efficiency. Cartridges of this type are also recommended to be used after the storage tank for additional purification of water from possible microbiological contamination. What to do if you use jug or flow type filters where the use of ultraviolet and ultrafiltration or industrial Ro plant is impossible or impractical? First of all, water after these types of filters can be boiled. It no longer contains chlorine, it is partially purified from natural organic impurities, so boiling in this case is very effective and safer. At the same time, the optimal and more reliable solution to this problem is the use of bactericidal properties in household filters. Most often, standard charges (coal, ion-exchange resins) containing silver ions are used for this purpose. The bactericidal properties of this noble metal have long been known, but perhaps not everyone knows that silver also has toxic properties (see editorial note No. 4). Therefore, The basic requirement for sorbents based on it is as follows: metal ions must be firmly fixed on the material, in order to avoid the possibility of its ingress into drinking water. So, for a long time, activated carbon containing silver ions was used. Unfortunately, this sorbent did not acquire widespread use, since it not only did not ensure proper disinfection of water, but also significantly increased its microbiological composition. An effective sorbent, devoid of these shortcomings, was developed by the research and production association and is actively used today in the filters for drinking water of TM Nasha Voda. Sorbent is a highly porous polymer material containing silver nanoparticles. Since the particles are in a carefully fixed state, they do not wash out and do not fall into purified water. At the same time, microorganisms present in water come into contact with silver on the surface of the polymer material and die. Thus, this biocidal sorbent simultaneously provides both the proper disinfection of water and its compliance with quality standards for silver content. In addition to all of the above, one of the most reliable and convenient solutions for local water treatment is the use of integrated water treatment systems. The latest representatives in this area are the P’U product line manufactured by Ecosoft LLC. Depending on the modification, P’U systems can include up to 9 stages of purification, which makes it possible to obtain ultrapure, with improved taste properties and, most importantly, safe bacteriostable water. The latter is achieved at the final stage of cleaning, where an ultrafiltration membrane is used to disinfect water after the storage tank.
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