AEROSTRIP Diffusers

The AEROSTRIP ® diffuser has been designed as a fine bubble diffuser device with very low energy demand, which may be safely employed for domestic and industrial sewage treatment worldwide.

The materials used for AEROSTRIP ® diffusers are resistant against all components which are permitted to be fed to a sewage treatment plant in accordance to German ATV-regulations (ATV A115 Anlage 1).

Procedural benefits for AEROSTRIP ® at a glancef

• oxygen transfer efficiency up to 60%
• aeration efficiency from 3 up to 5 kg O2 /kWh
• 0 to 100% control of air flow range
• non-clogging diffuser membrane
• capable of intermittent operation
• low maintenance requirements and costs
• avoiding of settlements due to fixation of diffusers directly to tank floor
• longevity – some plants are in operation trouble-free for >18 years now
• competitive product because of optimal aeration efficiency values

These outstanding qualities of AEROSTRIP ^® diffusers have been confirmend by numerous field measurements carried out by Public Authorities, Universities and independend research institutes. Details are available on request.

Operation behaviour of AEROSTRIP ® diffusers in waste water

The excellent figures of AEROSTRIP ® diffusers are not achieved in clean water tests only, but also in practical operation with sewage. Tests showed a considerable alpha-value of ~0.8.

The figure of employed energy for BOD5-removal would have more relevance from practical point of view. Heavy loaded plants equipped with AEROSTRIP ® are employing less than 0.3 kWh for the treatment of one kg BOD5, which may peak to an excellent 0.5 to 0.7 kWh per kg BOD in plants using extended aeration.

Product range AEROSTRIP ® – Single diffuser

AEROSTRIP ® diffusers are available in two material: PVC and Stainless steel.

For a sewage temperature >30°C we recommend to use AEROSTRIP ® diffuser type T.
For the moment we advise against using AEROSTRIP ® made of PVC for water temperatures >30°C.

TYPE T

Material

• Base plate / profile: V4A
• Air connection: V4A
• Air connection diameter / type: 3/4″ od. 1″ OD
• Peripherals strips: außen:V4A | innen:PVC

Data Sheet

• Width 150mm: Bull 370*
• Width 180mm: Bull 376
• Fastening: Bull 372

Lenght: 1,0 – 4,0m in 0,5m-steps. Special lengths available on request.

Membrane: PU

* Diffusers with a width of 150mm are offered only as spare parts or replacement for plants already using this size of diffusers.

Type Q

Material

• Base plate / profile: PVC
• Air connection: PVC
• Air connection diameter / type: OD32 mm pipe
• Peripherals strips: PVC

Data Sheet

• Width 150mm: –
• Width 180mm: Bull 390
• Fastening: Bull 392

Lenght: 1,0 – 4,0m in 0,5m-steps. Special lengths available on request.

Membrane: PU

Both types of diffuser have the same efficiency. Minor deviations concerning oxygen yield result from higher diffuser thickness (5cm) for the PVC type.

For a sewage temperature >30°C we recommend to use AEROSTRIP ^® diffuser type T.
For the moment we advise against using AEROSTRIP ^® made of PVC for water temperatures >30°C.

For Fastening of diffusers you may choose between

• Fixation directly to the tank floor
• height adjustable fixation (e.g. if tank floor is sloped)
• Fixation to a substructure (e.g. made of stainless steel)

For Air supply (Connection to main air pipe) you may choose between

• Groups of max. 4 diffusers (recommended)
• Groups of >4 diffusers using distribution pipes >DA63
• separate per diffuser using a PE pipe DA32

The number of diffusers can be chosen according to requirements considering air flow per diffuser group. For more details concerning air supply please see the corresponding data sheet.