It mainly plays the role of solid-liquid separation, and at the same time can reduce COD, BOD, N, P, SS and color. The equipment consists of air flotation tank body, dissolved gas system, dissolved gas releaser, slag scraper and electric control system. It is suitable for algae removal and turbidity reduction of drinking water, landscape water, oil-water separation, water treatment of chemical industry, foodstuff, wool spinning, slaughtering, brewing and other industries.