Physical and chemical environmental factors’ influence on the proteolytic potential of probiotic microorganisms’ individual representatives

• Published in: BIO Web of Conferences Vol. 52; p. 76
• Main Authors: Маkarevich, Е. V., Kozhukhova, E. V., Zaychikova, D. S., Litvinova, M. U., Krivenko, O. G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 01.01.2022
• Subjects: Arctic zone; Coliforms; Dissolved oxygen; Environmental factors; Environmental monitoring; Fisheries; Hygiene; Ice environments; Indicators; Microorganisms; Nitrogen dioxide; Oxygen consumption; Polar environments; Pollution index; Probiotics; Proteolysis; Reservoir fisheries; Rivers; Surface water; Thermophilic bacteria; Water analysis; Water pollution; Water quality; Water sampling; Water supply; Water use
• ISSN: 2117-4458; 2273-1709; 2117-4458
• DOI: 10.1051/bioconf/20225200076

This work is devoted to the study of sanitary and hygienic monitoring of fishery water use objects in Murmansk region. The paper presents assessment of the ecological and sanitary conditions of fishery reservoirs in the Arctic region of the Kola and Tuloma rivers for the period 2016-2018 based on the use of microbiological, hydrochemical and parasitological indicators, as well as the integral index of surface water pollution. Hydrochemical studies consisted of determining the biochemical oxygen consumption, the mass content of NH4+, NO2-, NO3-, iron, and dissolved O2. The assessment of the river waters sanitary state was carried out by means of microbiological and parasitological methods. The microbiological parameters were used to determine the number of common and thermotolerant coliform bacteria, coliphages, and the presence of intestinal infections pathogens. The water of rivers does not meet the hygienic standards in terms of hydrochemical indicators in seventeen percent and in terms of microbiological indicators in five percent of cases. According to parasitological indicators, hygienic standards meet the requirements. In five points of water sampling, the water of the Tuloma and Kola rivers was evaluated as pure according to the integral hydrochemical index value and belongs to the second category of quality. In general, the high-water quality of Murmansk region rivers was noted. In conclusion, it should be emphasized that systematic monitoring of water supply sources is necessary to obtain an idea of the indicators’ variability and to assess the rivers pollution degree.