Abstract
The present article is concerned with the problems of recycling and reuse of waste generated in the electrolytic production of sodium hypochlorite at water treatment plants. New engineering solutions aimed at ensuring environmental safety and lack of waste during large-scale production of sodium hypochlorite from aqueous solutions of common table salt are recommended herein.
Highlights
Drinking water disinfection is a mandatory step to be taken before distributing it to consumers through the water distribution system
The use of liquid chlorine may cause safety issues related to its transportation through populated areas and storage of large amounts at water treatment plants, many of which are already located within the expanding urban territory
The hazards of using liquid chlorine and the fact that the Vodokanal water and wastewater treatment plants fail to comply with a number of stringent industrial safety requirements of the Federal rules and regulations, in particular, “Safety Rules for Chlorine and Chlorine-Bearing Material Production” No 554 approved by the Federal Service for Environmental, Technological and Nuclear Supervision on November 20, 2013, made the traditional technology of water disinfection ineffective
Summary
Drinking water disinfection is a mandatory step to be taken before distributing it to consumers through the water distribution system. Consumers of foreign technologies inevitably depend on foreign service and repair, as well as on deliveries of imported components and consumables (such as extremely expensive ruthenium-iridium coated titanium anodes with a two- or three-year warranty period for the metal oxide coating). All this causes serious financial problems and some uncertainty among importers, especially acute in view of increasing sanctions by the EU countries.
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