The combined effect of UV radiation and ultrasonic cavitation on saprophytic and conditionally pathogenic microflora of cold-water ultrasound

The paper considers the combined effect of ultraviolet radiation (UV) and ultrasonic cavitation (ultrasonic) as part of ultrasonic filtration systems on representatives of saprophytic and conditionally pathogenic microflora of water. Ultrasound examination (25 kHz) is a promising method of purification in aquaculture due to the possibility of inactivation of microorganisms in agglomerates that are not exposed to UV. As a result of the study of the cultivated microflora, it was found that ultraviolet radiation and the combined effect of UV and ULTRASOUND have a significant effect on the quantity and quality of saprophytic microflora of water. It is shown that the studied modes of operation led to a significant decrease (at p <0.05) in the occurrence of the genus Escherchia relative to the control (without exposure to ultrasound and UV). The total contamination of UV water decreased to 1.2×102 CFU/ml with UV operation and to 1.1×102 CFU/ml with the combined action of UV and ultrasound. The UV sterilizer showed low efficiency in relation to Enterobacter cloacae, while the combined effect of UV and ultrasound led to a significant decrease in CFU to 0.94 ± 0.05 Log10.