Hydrochemical and microbiological characteristic of cold springs Uta-Bulag (Buryatia)

The seasonal dynamics of hydrochemical parameters and a number of hydrolytic bacteria were studied in the exit areas of non-aerated cold springs Uta-Bulag. The interseasonal studies showed a stability of physical and chemical parameters such as pH, salinity, carbonate and hydrocarbonate contents. Changes were observed in the oxygen content and temperature: in winter at 3-4 °С, the oxygen content was 4,2-5,2 mg/dm 3. When the temperatures increased up to 11°C in summer, the oxygen content decreased to 1.2 mg/dm 3. A number of proteolytic bacteria reached 10 5 cells ml -1, cellulolytic bacteria 10 3 cells ml -1.