Dissolved air flotation machine is an efficient and stable water treatment equipment that purifies wastewater by removing oil, grease, or other suspended solids. The process design is to maximize the dissolution of gas in water under pressure, striving to achieve supersaturation, and then release air at atmospheric pressure in the flotation tank. The released air will form a large number of tiny bubbles, which will adhere to suspended solids in the water, causing them to float with the bubbles to the surface of the water, forming floating debris, which is then removed by a scraping device.