Dissloved Air Flotation Machine for Industrial Wastewater Treatment

Dissolved Air Flotation is a water and wastewater treatment process that clarifies wastewater through the removal of suspended matter such as oil, greases or solids. Removal is achieved by injecting pressurized air into the wastewater where micro-bubbles then interact with the suspended solid particles. This interaction causes these particles to float to the surface of the DAF where they are then skimmed and separated.

In industrial processing plants, a DAF is often used to reduce loadings and clarify wastewater. Tiny air bubbles are released into the tank causing small particulates to float to the top where they are skimmed off. To remove larger suspended solids, coagulant is dosed into the feed water—this helps to speed up clumping and settling.

Dissolved Air Flotation (DAF) is a highly efficient method for removal of turbidity, color, suspended solids and other contaminants from wastewater. A recirculation loop of pressurized water is saturated with dissolved air using a multistage impeller pump. The product of this process is termed “whitewater.” Whitewater discharges into calculated points along the pipe flocculator. Microscopic air bubbles become entrained in the floc particles. When the floc particles leave the pipe flocculator and enter the body of the DAF, they rise to the surface and form a sludge blanket. As the sludge blanket thickens, a skimmer drive transfers sludge to the DAF sludge sump. From the sump, sludge is pumped to dewatering equipment. The treated water gravity flows from the DAF vessel to a clear well or city discharge point.

There are numerous applications for the DAF:

• Meat and poultry industry
• Dairies
• Beverage sector
• Fruit and vegetable processing
• Potato and potato chips
• Vegetable oil processing
• General Food industry
• Manufacturing, metal processing
• Industrial laundries
• Paper, cardboard and printing
• Waste Activated Sludge thickening
• Potable water treatment
• Algae Removal

• Dissolved air pump edge bibulous the edge is inspiratory, pump pressurized mix within, gas to liquid efficient dissolving, small bubbles than 30 um.
• Low voltage operation, the dissolved gas efficiency is as high as 99%, release rate as high as 99%.
• Tiny bubbles and suspended particles of efficient adsorption, improve the SS remove effect.
• Dissolved gas water dissolving efficiency 80-100%, than traditional dissolved gas floating high efficiency three times.
• Pressure-capacity curve smooth, easy to achieve automatic control, easy to operate, easy maintenance, low noise.

Qingdao Yimei Environment Project Ltd. is found in 1988.We are located in the largest port city-Qingdao China. Our factary take up 36,000 square metres and there are more than 130 kinds machine for manufacturing. As a member of Shandong Province Environmental Protection Industrial Association, we have 360 staff and  72 experienced engineers.

Our main product is the equipment for Environment Protection and Waste Water Treatment.And the product is popular all over the world,such as Africa, North America,Domestic Market,Eastern Asia,Mid East.