UDC 628.166.094.3:661.418
DOI 10.35776/VST.2023.09.06

Gao Yuan, NEFEDOVA E. D., KINEBAS A. K., Lobanov Fedor

Disinfection of water with low-concentration sodium hypochlorite

Summary

An advanced safe technology for the production of low-concentration sodium hypochlorite from salt brine is considered. The main stages of the technological process are described in detail. Particular attention is paid to the issues of industrial safety and reliable operation of electrolyzers – units for the preparation of sodium hypochlorite at the Southern and Northern water treatment facilities of SUE «Vodokanal of St. Petersburg». The use of low-concentration solutions of sodium hypochlorite provides for improving the safety of water purification processes. Salt is the raw material for the production of sodium hypochlorite. Since the chemical is used directly at the place of production, there is no need for transportation. The combination of disinfection of treated water with low-concentration sodium hypochlorite (first stage) with ultraviolet irradiation (second stage) before supplying it to the city water supply network guarantees full compliance of water quality in terms of microbiological indicators with current standards and its high epidemiological safety.

Key words

disinfection , water treatment , sodium hypochlorite , epidemiologic safety

For citation: Gao Yu., Nefedova E. D., Kinebas A. K., Lobanov F. I. Disinfection of water with low-concentration sodium hypochlorite. Vodosnabzhenie i Sanitarnaia Tekhnika, 2023, no. 9, pp. 39–44. DOI: 10.35776/VST.2023.09.06. (In Russian).

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