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Biological Aerated Filter (BAF) is a new sewage treatment technology that combines biological contact oxidation and biofilm processes. BAF is filled with a large number of fillers with large surface area, high porosity, and stable biochemical properties. Through cultivation and domestication, the fillers are coated, and microorganisms play a role in biological adsorption and oxidation to treat pollutants in wastewater. Simultaneously utilizing the filtration effect of fillers and biofilms to retain suspended solids, thereby achieving the removal of SS, BOD, COD, AOX, nitrification, nitrogen and phosphorus.

Technical features:
Structural features:
——Integrated design, compact structure, carbon steel anti-corrosion, and long service life.

Process characteristics:
——It has the function of removing SS, COD, BOD, nitrification, denitrification, phosphorus removal, and AOX (harmful substances);
——Compared with the ordinary Activated sludge, it has the advantages of high organic load, small floor area (1/3 of the ordinary Activated sludge), low investment (saving 30%), no sludge bulking, high oxygen transmission efficiency, good effluent quality, etc;
——Integrating biological oxidation and interception of Suspended solids, it saves the subsequent sedimentation tank (secondary sedimentation tank), which is characterized by large volume load, hydraulic load and short hydraulic retention time;
——Good impact resistance, less affected by changes in climate, water volume, and water quality; A closed factory building can be built to reduce odor, noise, and the impact on the surrounding environment, with a good visual feeling.

Control characteristics:
——PLC fully automatic control, equipment fault alarm, safe and stable operation.
Energy conservation and environmental protection:
——It has high oxygen transfer efficiency, low aeration rate, and low operating energy consumption.
Application field:
——Deep water treatment, low-temperature micro pollution source water treatment, difficult to degrade organic matter treatment, and low-temperature sewage nitrification.