Ultrasonic manufacturers introduce the principle of ultrasonic inhibition
Ultrasonic has become a hotspot in the world for its mass transfer, heat transfer and chemical reaction. Its unique role and the development and popularization of ultrasonic power equipment have gradually made progress in industrialization in Europe and the United States. . China's science and technology development has become a new interdisciplinary - sonochemistry. Its development has also been done by workers in theory and application.
The so-called ultrasonic wave generally refers to sound waves with a frequency range of 20k-10MHz, and its application power in the chemical field mainly comes from ultrasonic cavitation. With strong shock waves and micro-jets with speeds higher than 100 m/s, high-gradient shear of shock waves and micro-jets can generate hydroxyl radicals in aqueous solution, and the corresponding physicochemical effects are mainly mechanical effects (acoustic flow, shock wave) , micro-jet, etc.), thermal effects (local high temperature and high pressure, overall temperature rise), light effect (sound luminescence) and activation effect (hydroxyl radicals generated in aqueous solution), the four effects are not isolated, but interact, promote each other, accelerate Reaction process.
Current research in ultrasound applications has demonstrated that ultrasound can activate biological cells and promote metabolism. Lower-intensity ultrasound does not destroy the intact structure of the cell, but it can enhance the metabolic activity of the cell and increase the permeability and selectivity of the cell membrane, while promoting the biocatalytic activity of the enzyme. The higher intensity of the ultrasonic action can denature the enzyme, causing the colloidal substance in the cell to undergo vigorous flocculation, flocculation and precipitation, gelation or emulsification, thereby causing the bacteria to lose biological activity. Also. Ultrasonic cavitation produces instantaneous high temperature and temperature changes, instantaneous high pressure and pressure changes, causing certain bacteria in the liquid to die, the virus to inactivate, and even destroy the cell walls of smaller embryos. Higher intensity ultrasound can destroy the cell wall and release intracellular substances. These biological effects are also applicable to the effect of ultrasound on the receptor. Due to the particularity of algal cell structure. Ultrasonic algae removal algae also has a special mechanism, which is to use the airbag in the algae cell as the cavitation nucleus of the cavitation bubble, and break the airbag when the cavitation bubble breaks, causing the algae cell to lose control and float.