Microbubbles have advantages including small size,high stability,long residence time in the fluid,large specific surface area,and high self-pressurization effect,etc.Microbubbles can greatly improve the contact area and contact time for gas-liquid system,which can intensify the interphase mass transfer between gas and liquid.Many different types of generators can produce microbubbles.The specific type of the generator is largely dependent on its application fields.This work reviewed the application of microbubble generator in water treatment,biological and medical field,mineral flotation,and chemical process.This review mainly focused on the type of generator and its working mechanisms in generating microbubbles.The bubble-generating characteristic of each type of microbubble generator was described.The influence of the structure and operating condition on the generator performance was reviewed.The suitable application condition of each type of microbubble generator was summarized.It was concluded that the microbubble generation technologies based on single mechanism would often have limitations.In contrast,the coupled microbubble generator,combining the advantages of multiple generation mechanisms,can generate smaller and more uniform microbubbles.Therefore,the development of coupled microbubble generator is of great significance for the future application.Finally,the possible application prospect and research direction of microbubble generator were summarized and previewed.
维普
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