Aerator type Mechanical aerators
Installation Dry fixed
Aeration gas Air
Standard oxygen transfer rate (kg O2/h) from 4 - 90
Standard aeration efficiency (kg O2/kWh) 2.0
Maximum motor output (kW) 45
 
 
 

Rotex brush aerators are horizontal-shaft surface rotors used for oxygen transfer and directional mixing in wastewater treatment. 

The rotating brush introduces oxygen into the water and induces a horizontal flow. Baffles are often installed downstream of the brush rotor to ensure uniform aeration and mixing right down to the tank floor.

Modern Rotex brush aerators are the more efficient descendants of the original Pasveer brush rotor design.

Applications

Corgin's Rotex brush aerators have been installed in wastewater treatment processes throughout the UK, from rural wastewater plants in the Scottish Highlands to dairy effluent treatment plants in South West England.

Aerators are commonly custom-designed for installation in existing oxidation ditches, carousels and annulus tanks, usually without draindown. They can also be installed to replace aging or failing equipment to improve oxygen transfer and mixing efficiency.

Key features

  • High oxygen transfer rates (standard aeration efficiency of 2.0kgO2/kWh)
  • Strong directional mixing
  • Rotor blades arranged around shaft in a spiral pattern
  • Robust, reliable design proven worldwide
  • Long-life bearings
  • Vertical splash plates (horizontal splash cover optional)
  • Clamp-on (rather than welded) galvanised or stainless steel blades
  • Shaft designed for up to 10m single span
  • Baffles provided where specified
  • Low vibration
  • Optional access bridges

High efficiency

Rotex brush aerators are efficient aerators, typically having a guaranteed oxygen transfer efficiency of 2.0kgO2/kWh in standard conditions.

Operation

Oxygen transfer and mixing power are controlled by varying the water level (and therefore immersion depth of the aerator) and/or by adjusting the speed of rotation. Variable Frequency Drives (VFDs) are a common method of adjusting the speed of rotation in order to optimise energy efficiency.

Construction

The Rotex Brush Aerator is made of a seamless, hollow shaft to which the rotor blades are clamped in a star pattern. The blades are offset to form a spiral pattern around the shaft to reduce ‘tramping’ and bearing load as the rotor rotates in water. Gearboxes are typically designed with a service factor of 2.0, which well exceeds most alternative designs.

Rotex aerators can be supplied with access platforms and/or inspection covers for ease of inspection and maintenance.


Rotex brush aerators are horizontal-shaft surface rotors used for oxygen transfer and directional mixing in wastewater treatment. 

The rotating brush introduces oxygen into the water and induces a horizontal flow. Baffles are often installed downstream of the brush rotor to ensure uniform aeration and mixing right down to the tank floor.

Modern Rotex brush aerators are the more efficient descendants of the original Pasveer brush rotor design.

Applications

Corgin's Rotex brush aerators have been installed in wastewater treatment processes throughout the UK, from rural wastewater plants in the Scottish Highlands to dairy effluent treatment plants in South West England.

Aerators are commonly custom-designed for installation in existing oxidation ditches, carousels and annulus tanks, usually without draindown. They can also be installed to replace aging or failing equipment to improve oxygen transfer and mixing efficiency.

Key features

  • High oxygen transfer rates (standard aeration efficiency of 2.0kgO2/kWh)
  • Strong directional mixing
  • Rotor blades arranged around shaft in a spiral pattern
  • Robust, reliable design proven worldwide
  • Long-life bearings
  • Vertical splash plates (horizontal splash cover optional)
  • Clamp-on (rather than welded) galvanised or stainless steel blades
  • Shaft designed for up to 10m single span
  • Baffles provided where specified
  • Low vibration
  • Optional access bridges

High efficiency

Rotex brush aerators are efficient aerators, typically having a guaranteed oxygen transfer efficiency of 2.0kgO2/kWh in standard conditions.

Operation

Oxygen transfer and mixing power are controlled by varying the water level (and therefore immersion depth of the aerator) and/or by adjusting the speed of rotation. Variable Frequency Drives (VFDs) are a common method of adjusting the speed of rotation in order to optimise energy efficiency.

Construction

The Rotex Brush Aerator is made of a seamless, hollow shaft to which the rotor blades are clamped in a star pattern. The blades are offset to form a spiral pattern around the shaft to reduce ‘tramping’ and bearing load as the rotor rotates in water. Gearboxes are typically designed with a service factor of 2.0, which well exceeds most alternative designs.

Rotex aerators can be supplied with access platforms and/or inspection covers for ease of inspection and maintenance.


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Rotex brush aerator for wastewater treatment