Biofilm is a complex structure composed of microorganisms and their secreted extracellular polymers, which is widely present on various surfaces, such as medical devices, food processing equipment and the inner wall of pipes. As an efficient cleaning device, Ultrasonic U-V Cleaner has certain potential in removing biofilm, but it still needs to be further optimized to improve its cleaning effect, so as to meet the needs of different fields for thorough removal of biofilm.
First of all, the parameter setting of ultrasound is crucial. Frequency and power directly affect the intensity of cavitation effect of ultrasound. If the frequency is too high, it is difficult for cavitation bubbles to form a larger size, which is not conducive to the impact damage to the biofilm; if the frequency is too low, it may lead to poor cavitation effect. When the power is insufficient, it is impossible to generate enough energy to peel off the biofilm. Secondly, the wavelength and intensity of ultraviolet rays should not be ignored. Ultraviolet rays of different wavelengths have different killing mechanisms for microorganisms. For example, 254nm ultraviolet rays mainly kill bacteria by destroying the DNA structure of microorganisms. If the intensity is not enough, it is difficult to penetrate the inside of the biofilm and cannot fully inactivate the microorganisms. In addition, the working time and mode of the cleaner will affect the cleaning effect. Too short a working time may result in incomplete cleaning, and a single working mode may not be able to adapt to biofilms of different thicknesses and characteristics. In addition, the material, shape and surface roughness of the object being cleaned will also affect the effects of ultrasound and ultraviolet rays. For example, a rough surface may make it more difficult to remove the biofilm and affect the reflection and propagation of ultrasound.
For ultrasonic parameters, the optimal frequency range can be determined through experimental optimization. Generally, it is more appropriate to be between 20-50kHz. At the same time, the power should be appropriately increased, but excessive power should be avoided to cause damage to the object being cleaned. In terms of ultraviolet rays, choose lamps with multiple wavelength combinations, such as ultraviolet rays with wavelengths of 254nm and 185nm at the same time, to enhance the ability to sterilize and oxidize biofilms, and ensure sufficient ultraviolet intensity, which can be achieved by increasing the number of lamps or using high-power lamps. Adjust the working time and mode of the cleaner, use high-frequency ultrasonic impact first and then low-frequency ultrasonic oscillation, combined with intermittent ultraviolet irradiation, to give the biofilm enough time to destroy and sterilize, and also help improve cleaning efficiency. For special cases of objects to be cleaned, suitable cleaning accessories can be designed, such as flexible cleaning heads for curved pipes, so that they can better fit the surface and enhance the effects of ultrasound and ultraviolet rays.
To improve the cleaning effect of Ultrasonic U-V Cleaner on biofilms, it is necessary to comprehensively consider multiple factors and adopt targeted optimization strategies. By accurately adjusting the parameters of ultrasound and ultraviolet rays, reasonably designing the working time and mode, and adapting to the characteristics of the objects to be cleaned, the ability of the cleaner to remove biofilms can be significantly improved, so that it can play a greater role in many fields such as medicine, food, and environmental protection, effectively ensuring the cleanliness and safety of equipment and reducing the potential risks and hazards caused by biofilms.
