Determination of standardized doses of ultraviolet disinfection of water from bacterial, viral and parasitic contamination

Yu. A. Rakhmanin; Рахманин Ю. А.; Anzhelika V. Zagainova; Загайнова Анжелика Владимировна; T. Z. Artemova; Артемова Т. З.; E. K. Gipp; Гипп Е. К.; K. Yu. Kuznetsova; Кузнецова К. Ю.; I. V. Kurbatova; Курбатова И. В.; O. V. Gritsyuk; Грицюк О. В.; K. A. Novozhilov; Новожилов К. А.; M. M. Aslanova; Асланова М. М.; T. R. Maniya; Мания Т. Р.; Z. E. Fedets; Федец З. Е.; A. E. Nedachin; Недачин А. Е.; R. A. Dmitrieva; Дмитриева Р. А.; T. V. Doskina; Доскина Т. В.; I. A. Abramov; Абрамов И. А.; P. V. Zhuravlev; Журавлев П. В.

doi:10.47470/0016-9900-2019-98-12-1342-1348

Determination of standardized doses of ultraviolet disinfection of water from bacterial, viral and parasitic contamination

Authors: Rakhmanin Y.A.¹, Zagainova A.V.¹, Artemova T.Z.¹, Gipp E.K.¹, Kuznetsova K.Y.¹, Kurbatova I.V.¹, Gritsyuk O.V.¹, Novozhilov K.A.¹, Aslanova M.M.¹, Maniya T.R.¹, Fedets Z.E.¹, Nedachin A.E.¹, Dmitrieva R.A.¹, Doskina T.V.¹, Abramov I.A.¹, Zhuravlev P.V.²
Affiliations:
1. Centre for Strategic Planning, Russian Ministry of Health
2. Rostov Research Institute of Microbiology and Parasitology
Issue: Vol 98, No 12 (2019)
Pages: 1342-1348
Section: ENVIRONMENTAL HYGIENE
Published: 14.10.2020
URL: https://rjraap.com/0016-9900/article/view/639799
DOI: https://doi.org/10.47470/0016-9900-2019-98-12-1342-1348
ID: 639799

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Abstract

Introduction. The proposed criteria for the sanitary-bacteriological assessment of the quality of tap water must ensure its epidemic safety. In conditions of intensive bacterial contamination of water bodies, a special role is played by the barrier function of water treatment plants in relation to infectious agents. The overall quality of microorganisms is the pronounced resistance in the aquatic environment, primarily resistance to a number of chlorine-containing disinfectants, which guarantee the preservation of the population in drinking water undergone a water treatment system. Therefore, it is necessary to consider other possible ways of disinfection, such as ultraviolet irradiation.

Determination of the effective dose of ultraviolet (UV) disinfection against bacterial, viral and parasitic contamination of drinking water.

Material and methods. Tap water was used as model water for research. The effectiveness of UV irradiation with doses of 25, 40, 60 mJ/cm² against microorganisms was studied.

Results. In the course of the work, it was established that the UV disinfection technology with a dose of at least 25 mJ/cm² can be recommended as a disinfection method when used in conjunction with chlorination.

Conclusion. In water treatment technology, a dose of at least 25 mJ/cm² of UV irradiation can be recommended as a method of disinfecting water in case of microbial contamination by bacteria and viruses at a concentration not exceeding nˑ10² cells/virions in 100 ml, and at a concentration of microbiological contamination nˑ10³ cells/virions in 100 ml of water, the use of UV disinfection can be recommended only in conjunction with chlorination and with the provision of indices on the residual chlorine in the distribution network before serving to the consumer. The presented scheme will increase the barrier role of water treatment facilities with respect to viral and bacterial contamination, provide a prolonged decontamination effect, contributing to the suppression of bacterial growth in breeding nets and limit the level of parasitic water contamination during water treatment.

Keywords

drinking water, bacteria, viruses, protozoa cysts, helminthic eggs, standards, indicEs, UV dose, DNA

About the authors

Yu. A. Rakhmanin

Centre for Strategic Planning, Russian Ministry of Health

Author for correspondence.
Email: noemail@neicon.ru
ORCID iD: 0000-0003-2067-8014
Russian Federation

Anzhelika V. Zagainova

Centre for Strategic Planning, Russian Ministry of Health

Email: angelikaangel@mail.ru
ORCID iD: 0000-0003-4772-9686

MD, Ph.D., head of the laboratory of sanitary bacteriology, Virology and Parasitology Centre for Strategic Planning, Moscow, 119121, Russian Federation.

e-mail: angelikaangel@mail.ru

Russian Federation

References

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