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Home > Services > Construction & Construction Management > Products & Spares > Horizontal Rotor

Horizontal Rotor

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Horizontal_Rotor_Product_3 Horizontal_Rotor_Product_1 Horizontal_Rotor_Product_2 Horizontal_Rotor_Product_4Key Features:

  • High oxygen transfer rates
  • Configuration enables ‘nitrification/denitrification’ control
  • Complete mixing and circulation velocities through aeration tanks
  • Robust, rugged construction and non-clog design
  • Maximum aerosol and splash protection
  • Dissolved oxygen monitoring and variable speed rotors available

General Description:
The biological oxidation process by horizontal rotor aeration works through the mixed flow principle. A rapid turbulence of the ditch contents mixes influent with air. It is simple, inexpensive, and efficient. Our range of horizontal aerators caters for small community treatment plants up to major installations serving 250,000 population or greater.

All horizontal aerators are of a non-clog design with rugged construction and high efficiency operating characteristics.

Three rotors are used in our ditch systems, with the MINI rotor being the smallest, the MIDI an intermediate size and the MAXI the largest.

The horizontal rotor design ensures high oxygen transfer rates as well as complete mixing and circulation velocities with a minimum expenditure of power. Proven operating characteristics show that the rotors are simple, inexpensive and efficient.

The Maxi Rotor:
Able to provide in excess of 9.0Kg dissolved oxygen per hour per metre of rotor length. The MAXI is a rugged and vigorous turbulence rotor. It has a diameter of 1,000mm and is manufactured in standard lengths of 4.5, 6.0, 7.5, and 9.0 metres. Intermediate lengths can also be manufactured.

The Midi Rotor:
This intermediate sized rotor is of similar configuration to the MAXI rotor. An oxygen transfer rate approaching 4.5Kg/m/hour is possible. Maximum unit length is around 6.0m but it is possible to couple rotors together to give greater individual length.

The Mini Rotor:
For smaller installations, the MINI has proven performance in hundreds of installations worldwide. The rotor is 700mm diameter, with maximum oxygen transfer of some 3.7Kg/m/hr and maximum unit length of 4.0m. Again, coupled units can provide greater individual length if required. Construction is of cage form.

High Oxygen Transfer Rates
All of our horizontal rotors have been independently tested and have proven high rate performance.

Flexibility
Oxygen transfer is variable against rotor blade immersion. This provides flexibility in operation and provides a capacity to handle shock load conditions. In addition, further flexibility can be achieved with a multi rotor plant, by switching off one or more units against demand. Dissolved oxygen monitoring equipment will cater for these features. Primary rotors have 24 hour operation to provide the necessary circulation.

Ideal Circulation Velocities
Rotors provide complete mixing and circulation velocities in the aeration tank, with vigorous flow.

Easy Maintenance Access
A major advantage of our range of horizontal rotors is that full maintenance access is available to all components from bridge level without the need to interfere with tank contents.