Increased oxygen transfer
Better distribution of dissolved oxygen
Adaptability in any drawing
Lower operating cost
Lower power consumption
Lower power consumption
Best mix
Flexibility
Better decantation of the effluent
Low maintenance
Constructive characteristics Air Flow Membrane Applications
Circular B&F Membrane Diffuser 230mm, Fine Bubble - Welded The thin bubble membrane diffuser with triple system, antifouling (backflow) is mounted on bases and connections in special thermoplastics. It is indicated for the vast majority of cases because of its high oxygen transfer. Its welded base to the tube ensures greater strength and better hydrodynamic coefficient, ensuring greater operation efficiency and durability. Minimum: 0,010 m³ / min
Maximum: 0.120 m³ / min
Produced in EPDM, Nitrile, Neoprene, SBR and special compounds. • Conventional Activated Sludge
• Activated Sludge with Extended Aeration
• Batch Activated Sludge (SBR)
• MBBR
• MBR
• Underwater Aerated Biofilters
• Aerobic Digesters
Circular B&F Membrane Diffuser HD, Thin Bubble - Threaded The thin bubble membrane circular diffuser, with triple anti-backfill system, is mounted through a threaded connection. Available in three sizes, 200, 270 and 340 mm, it is made from special plastics reinforced with fiber for greater mechanical resistance. Minimum: 0.030 m³ / min
Maximum: According to model
Produced in EPDM, Nitrile, Silicone, EPDM coated with Teflon® and special compounds. • Conventional Activated Sludge
• Activated Sludge with Extended Aeration
• Batch Activated Sludge (SBR)
• MBBR
• MBR
• Underwater Aerated Biofilters
• Aerobic Digesters
Ceramic Circular Diffuser 180mm, Fine Bubble The ceramic diffuser is made of aluminum oxide and burned in a continuous oven at 1200ºC, which provides resistance to most chemical attacks. This model is especially suitable for ozone applications. Minimum: 0,015 m³ / min
Maximum: 0,075 m³ / min
• Ozonizers
Membrane Tubular Diffuser The thin bubble membrane tubular diffuser, with backflow system, is mounted on thermoplastic tube, with connections and stainless steel clamps in various sizes. This model is especially suitable for removable / floating systems (Air Float and Air Grid line). Mínima: 0,028 m³/min
Máxima: Conforme modelo
Produced in EPDM, Nitrile, Neoprene, Urethane, SBR and special compounds. • Conventional Activated Sludge
• Activated Sludge with Extended Aeration
• Batch Activated Sludge (SBR)
• MBBR
• MBR
• Underwater Aerated Biofilters
• Aerobic Digesters
Circular Membrane Diffuser 105mm, Thick Bubble The EPDM thick bubble diffuser is mounted on the PVC base and is fixed by the fixing recesses. It opens automatically with the air pressure and with the interruption of the air supply occurs the closure of the diffuser, preventing the entry of the sewer into the pipeline. Suitable for mixing, equalizing and aerated sandbox applications. Minimum: 0,020 m³ / min
Maximum: 0.420 m³ / min
EPDM

• Equalization Tanks
• MBBR
• Aerated Sandboxes
• Underwater Aerated Biofilters

Stainless Steel Tubular Diffuser, Thick Bubble D12 The thick bubble tubular diffuser is made entirely of stainless steel. It has at one end a threaded connection (3/4 NTP) for coupling to distribution branches. It is indicated in situations where the effluent is highly corrosive, high temperature situations, equalization tanks, mixing and homogenization. Minimum: 0,05 m³ / min
Maximum: 0,340 m³ / min
• Equalization Tanks
• MBBR
• Aerated Sandboxes
• Underwater Aerated Biofilters
Stainless Steel Tubular Diffuser, Thick Bubble D24 The thick bubble tubular diffuser is made entirely of stainless steel. It has at one end a threaded connection (3/4 NTP) for coupling to distribution branches. It is indicated in situations where the effluent is highly corrosive, high temperature situations, equalization tanks, mixing and homogenization. Minimum: 0.140 m³ / min
Maximum: 1,130 m³ / min ______________________________
• Equalization Tanks
• MBBR
• Aerated Sandboxes
• Underwater Aerated Biofilters
Strip Diffuser Panel format with high oxygen transfer rates up to 30g / Sm³.m, this ultra-thin bubble diffuser uses polyurethane membrane. It is available in sizes 1,5, 2,0, 3,0 and 4,0 m.

The model also has a check valve against the ingress of water and sludge while allowing membrane relief, which means low operation and energy costs.
According to model adopted. Polyurethane • Conventional Activated Sludge
• Activated Sludge with Extended Aeration
• Batch Activated Sludge (SBR)
• MBBR
• MBR
• Underwater Aerated Biofilters
• Aerobic Digesters
Blowers
B&F Dias has a complete line of air generation systems with centrifugal blowers, bolts and roots developed especially for application in diffusion air aeration systems under the strictest controls and quality standards achieved in more than 25 years of application development. The use of air generating systems with bolts or roots blowers is synonymous with lower energy consumption, guaranteed generation of air free of oil, minimal maintenance and high durability. With a huge variety of models of different sizes, assembled in various configurations, the air blowers stand out for the application of diverse forms of operation with flow intervals from 35 up to 15800 m3 / h with pressures up to 1200 mbar (12 mca). All sets have special accessories for application in diffuse air aeration systems. Bases and couplings, mufflers, air filters, anti-vibration supports, pressure gauges, check valves, safety valves and acoustic insulation cabins.




Interconnection Tubing
B&F Dias is also a company specialized in the design and execution of interconnection piping between the blower house to the point of application (tank / pond / reactor / valve / channel) of the diffusion air aeration system. The dimensioning of this set is made considering the most important factors (air velocity, temperature, load losses) for the application in aeration systems in conjunction with air blowers. With diameters from ¾ "up to 60", the B & F Dias interconnection pipes are all made with AISI 304 or 316 stainless steel connections and pipes. All correct and suitable fastening, anchoring and guide brackets are also included. (support), control and locking valves.

Consult our engineering and sales department for the correct determination of diffuser air flow. We do not recommend the use of airflows near the maximum flows of each model.