WATER PREPARATION IN HOTEL AND RESTAURANT SYSTEMS

Abstract

In these studies, methods of water treatment in hotel and restaurant systems are considered. Having studied the process of filtering water on polystyrene foam loading, the possibility of reducing the consumption of chemical reagents during subsequent liming has been established. Presented technologies of desalination and deep softening of water achieve a reduction in the consumption of reagents for the process, the elimination of secondary pollution by Cl^-, Na⁺ ions. The possibility of controlling the liming process (stages of primary sediment formation from a homogeneous system) based on pH and Eh parameters has been demonstrated. The subsequent H⁺ cationization of a part of the flow with its subsequent mixing with the main flow after liming allows obtaining water for household purposes and the subsequent Na⁺ cationization of deep softening of boiler water with lower consumption of reagents for ionite regeneration. Strongly acidic cationite NRV 100R in the form of H⁺ and strongly acidic cationite C 100E in the form of Na⁺ were used as the studied ion exchange resins. The technology may include an additional filtering operation through a special loading in order to prepare water for health and cosmetic purposes. As a result of research, it was established that pre-filtering of water on polystyrene foam loading (filter) allows to reduce the consumption of reagent in the liming process, due to the reduction of the content of hydrogen phosphates, hydrogen carbonates, sulfates and hydrosulfates, for the extraction of which a significant amount of reagent was spent. A package of documentation for the production of a block-module complex for water softening and desalination has been developed. In the proposed installation, a sorption block with a special (therapeutic) load, approved by the Ministry of Health of Ukraine for the food industry and for water treatment of unlimited use (for health and cosmetic purposes) can be provided.