REMOVAL OF IRON COMPOUNDS FROM MECHANICAL FILTERS HOUSEHOLD REVERSE OSMOTIC SYSTEMS WATER PURIFICATION

Abstract

Today, the most convenient and widespread option for cleaning and purifying drinking water is to install reverse osmosis systems directly at the water intake points. However, the use of reverse osmosis systems has disadvantages associated with the frequent need to replace their elements. The article discusses the competitiveness of negative impact on the environment of reverse osmosis systems and ways to regenerate filters with the possibility of their reuse. Currently, there are no companies or organizations in Ukraine that would collect and dispose of such filters. This direction is undeveloped. There are practically no corresponding data in the scientific literature. If you take into account the fact that, according to our calculations, about 88,000 domestic reverse osmosis systems are in use today in Kyiv alone, it is easy to calculate that 176,000 polypropylene cartridges with a total volume of 105 m3 of polypropylene enter the environment during the year. 
 The article presents method of regeneration of mechanical filters from iron compounds and other harmful impurities deposited on the surface and pores of the filter during operation. Studies of the jet sulfuric acid as a cleaner have confirmed its effectiveness and sufficient safety for further processing of cleaning products as an additive to cement. To establish the minimum residual concentration of iron in the mother liquor, a cycle of experiments was conducted and it was established that pH 4.0-4.5 can be considered optimal, at which the content of iron ions is at the level of their content in drinking water. There was made an estimation of acid. Technologies of large-scale cleaning used filters can be beneficial and cost-effective..
 The results of the experimental study make it possible to develop a treatment plant with an automated system for dosing acid and measuring acidity.