Research on application of hydrocyclone microbubbles generator in flotation of oil-water emulsion

Abstract

With the improvement of environmental protection requirements, economical and efficient oily wastewater treatment methods have become a research hotspot. At the same time, the characteristics of microbubbles (large specific surface area, high zeta potential, rises slowly) make it very widely used in various fields, including the treatment of oily wastewater. There are many methods to generate microbubbles, and each method has its own applicable fields. In order to better apply microbubbles to the separation of emulsified, the experiment used a hydrocyclone to produce microbubbles. The ability of microbubbles to separate oil-water emulsions verified by the method of combining visual processing with oil content testing. The experiment shows that the hydrocyclone can generate a large number of small-sized microbubbles, and the microbubbles are stable in the emulsion for more than 30 minutes. In addition, the microbubbles can better float the emulsified oil and concentrate it on the water surface. After the treatment of microbubbles, the oily wastewater can be easily separated from oil.