Biological Aerated Filter (BAF), a new type of fixed bed biofilm wastewater treatment process, aerobic or anoxic bioreactors that use particulate filter material to fix the biofilm, integrate biological contact oxidation and Suspended matter filter bed retention function in one, can effectively remove SS, CODcr, BOD5, NH3-N, TN, TP, AOX (hazardous substances) and hardness, turbidity, color, etc. in water, suitable for municipal sewage, industrial sewage, Advanced treatment of reclaimed water and pretreatment of contaminated water sources. BAF has been widely used in recent years because of its many characteristics that other processes cannot match.

Product detail

Original: Jiangsu, China

Certification: ISO9001, ISO14001, etc.

Price: Negotiable 

Payment term: TT, LC

Delivery date: Negotiable

Packing: export standard

Market: Middle East/ Africa/Asia/South America/Europe/North America

Warranty: 1 year

MOQ: 1 set

Equipment Features: 

According to the direction of water flow, there are upflow and downflow. Downflow biological aeration filter adopts reverse process route of water and gas while inflowing water, so as to form biofilm on the surface of the medium. It is filtered and adsorbed as a nutrient matrix for the "depletion-clearing" obligate degrading bacteria, which accelerates the formation of biofilms by the degrading bacteria, which further "captures" the matrix and assimilate, metabolize, and degrade it. Therefore, the biological filter can degrade organic matter and have the functions of biological flocculation and adsorption filtration. And because the biofilm is attached to the filter material, the activity is very high, and the biofilm is not limited by the age of mud, which is very beneficial to the degradation of pollutants.

     With the progress of the treatment process, the suspended activated sludge between the filter material gaps forms a sludge filter layer between the filter material gaps, while oxidizing and degrading the organic matter in the sewage, it plays a role in further adsorbing and filtering, thereby enabling the organic matter And suspended matter can be removed more completely. In the upper part of the reactor, heterotrophic microorganisms are dominant bacteria, carbon pollutants (CODcr, BOD5 and SS) are mainly removed here, while in the lower part of the reactor, autotrophic bacteria such as nitrifying bacteria dominate and ammonia nitrogen is nitrified . Inside the biofilm and in the gaps between some fillers, facultative microorganisms exist in a large amount of accumulated activated sludge, so the removal of carbon pollutants can occur in BAF, and it also has the functions of nitrification and denitrification.

     During the operation of the filter, with the metabolism of the biofilm, the impurities trapped on the biofilm and the filter material continue to increase, the head loss in the filter material increases, and the water level rises. At a certain period, the filter material needs to be backwashed . The biological aeration filter uses the clear effluent stored in the chlorination sterilization tank as backwash water. There is no separate backwash tank. The backwash wastewater is returned to the primary treatment facility through the drain pipe.

The C/N pool of the aerated biological filter is mainly used to adsorb and oxidize and reduce the organic substances in the wastewater through the adsorption, oxidation and reduction of microorganisms in the microbial film that adheres to the filler and oxidizes the complex macromolecular organic matter. It is a simple inorganic substance to achieve the purpose of purifying wastewater.

Product process

   The N tank of the aerated biological filter mainly nitrifies the ammonia nitrogen in the effluent of the C/N aerated biological filter to convert NH3-N to NO2--N or NO3--N. Thus, the removal of ammonia nitrogen is finally achieved.

Quality Assurancce

Strict contract auditing invloved all departments to assure the feasibility of each order.

Process design and validation before bulk production.

Strictly control on all raw and auxiliary materials, All raw materials reach the world advanced level.

On-site inspection to all processes, inspection record keep traceable for 3 years. 

All inspectors are skilled with international certificates.

Qualified WPS and professional welders guarantee welding quality.

100% inspection of finished sprouts before shipment.

Advanced and complete testing and inspection equipment: NDT, metal Microscope, impact tester, hardness tester...

Regular training for inspection staff. 

Hot Tags: biological aerated filter system(baf), China, suppliers, manufacturers, factory, customized, price, OEM