To further improve sterilization efficiency, ultrasound must be combined with other sterilization techniques. The use of ultrasound combined with other sterilization techniques has a broad application prospect. In recent decades, the research progress of ultrasonic synergy with ozone, nano titanium dioxide, microwave, laser, ultraviolet, heat and pressure sterilization.
Ultrasonic synergistic ozone
Ultrasound can significantly enhance the sterilization rate of ozone. Under the same treatment time, the sterilization rate of ultrasonic synergistic ozone is higher than that of ozone treatment alone. When the ozone usage is the same, the ultrasonic treatment time can be shortened, thereby saving ultrasonic energy. The main reason for the combination of the two is that the ultrasonic can make the ozone bubbles pulverize into microbubbles, greatly increase the dissolution rate, increase the concentration of ozone, and the high concentration of ozone can rapidly oxidize and kill the bacteria.
Ultrasonic synergy with nano titanium dioxide
The nanometer titanium dioxide catalyst has obvious synergistic bactericidal effect with ultrasonic wave, and the pH value has a slight influence on the ultrasonic sterilization effect, and the bactericidal effect is better than that of the nanometer titanium dioxide catalyzed ultraviolet light sterilization effect. The nanometer titanium dioxide catalytic ultrasonic treatment not only has a good bactericidal effect, but also has a certain clean effect on the smooth surface, and can perform sterilizing effect on the ultrasonic cleaning of the contaminated equipment at the same time!
Ultrasonic cooperative microwave
The Ming green tea soup will obviously brown after 5 days at room temperature, and the transparency of the tea soup is greatly reduced. The tea soup treated by high temperature can ensure the safety of the tea soup, the color of the tea soup is stable, the transparency is good, and it will not brown. The safety of drinking tea by microwave and ultrasonic sterilization can be ensured, and the growth of each strain is extremely small. The color of the tea soup is stable, the transparency is good, and the browning is not browned.
Among the three sterilization methods, the tea broth with ultrasonic sterilization has the least color depth and the best transparency. The tea polyphenols retained in the tea soup are also the most, which is a better way to sterilize green tea and protect tea polyphenols from loss. Tea soup processing technology.