Dissolved air flotation is widely used in water supply and drainage and wastewater treatment in recent years in the process of operation. It can effectively remove floating flocs which are difficult to precipitate in water when it is used. It is widely used in petroleum, chemical industry, printing and dyeing, paper making, oil refining, leather, steel, mechanical processing, starch, food and other sewage treatment.

Dissolved air flotation has been widely used in water supply and drainage and wastewater treatment in recent years. It can effectively remove the flocs which are difficult to precipitate in wastewater.

Application characteristics of dissolved air flotation

1. The process and equipment of dissolved air flotation are simple, easy to use and maintain.

2. Dissolved air flotation can effectively eliminate sludge bulking.

3. Aeration into water during air flotation has obvious effect on removing surfactant and odor in water. At the same time, aeration increases dissolved oxygen in water, which provides favorable conditions for subsequent treatment.

4. For low temperature, low turbidity and algae-rich water sources, the air flotation method can achieve the best results.

The sewage from dissolved air flotation reacted by adding chemicals enters the mixing zone of the air flotation and contacts with the released dissolved air-water mixture, so that the flocs adhere to the fine bubbles, and then enter the air flotation zone. Flocculants float to the water surface under the action of air buoyancy to form scum. After the clear water from the lower layer flows to the clear pool through the water collector, part of it is refluxed for the use of dissolved air, and the remaining clean water flows out through the overflow outlet. When the scum on the surface of the air flotation tank accumulates to a certain thickness, it is scraped into the sludge tank of the air flotation machine by the foam scraper and discharged.www.khnwatertreatment.com