Perspectives for improving deironing technologies groundwater for local drinking systems

In order to provide the population with high-quality drinking water, it is more expedient to focus on the use of underground sources of water supply, which are better protected from pollution in comparison with surface waters. However, a significant part of the underground sources of water supply is characterized by a high iron content, and the water from them needs to be deironed before being supplied to consumers. Removal of excessive iron content from underground water can be carried out by reagent or reagent-free methods, using water deiron installations of various design schemes and resorting to measures that increase the efficiency of their work. On the basis of the analysis of existing technologies for removing iron from groundwater and modern trends in the field of water purification, it is proposed for local water supply systems to use a filter with an automatic control valve and a technology that provides for reagent-free iron removal of groundwater due to the oxidation of dissolved iron with air cushion oxygen and further detention of the sediment formed in the layer of the multicomponent filter load. This technology is characterized by low cost and wear resistance of natural filter materials, ease of operation, environmental friendliness, which excludes secondary contamination of purified water with reagents, compactness and automation of control processes, which is especially relevant for small settlements.