hydrodynamic cavitation

The effect of cavitation phenomena excited by ultrasonic radiation and in a jet-type hydrodynamic cavitator on the change in the phase-dispersed state of hydrated calcium oxide was investigated. The influence of the conditions of cavitation activation of calcium hydroxide on the sedimentation stability of its suspension was established. Based on the analysis of the intensity of sedimentation of Ca(OH)2 particles after cavitation treatment of calcium hydroxide suspension, the probable course of this process in different time periods is proposed.

The influence of the hydrodynamic cavitation on the absorption quality of water and water solutions of nitric acid as compared to NOx was theoretically justified and experimentally proved. The mechanism of acid formation as a result of this influence was identified. The industrial test at the Severodonetsk Azot Association PJSC was carried out by the irrigation of absorption column of activated water (after using cavitation device). This allowed to intensify the process in the absorption column and lower concentration of NOx from 0.11 to 0.08 % vol.

Disinfective action of physical-chemical effects accompanying hydrodynamic cavitation on the microorganisms sanitary indices in water has been studied. Disinfection kinetics was found to be dependent on the cavitation field characteristics and the microbes population. Based on the structural-morphological investigation of the E.coli bacteria it was found that antimicrobial effect is obtained due to the mechanical rupture of cells and chemical disinfection, which results from the hydroxyl radicals and hydrogen peroxide effect.