If the content is not available in your preferred language, please contact us by e-mail.

Passavant Surface Aerator Mammutrotor

Reliable and efficient oxygen enrichment with effective matter distribution and activated sludge circulation - as a basis for the optimal activity of microorganisms and thus a particularly good extraction of pollutants in biological wastewater treatment systems.

Unique Selling Point

  • Particularly robust operation and long service life
  • Constant oxygen input throughout the entire service life
  • Trouble-free maintenance and low maintenance requirements - all relevant parts above the surface of the water
  • Flexible fields of application with regard to possible control strategies and treatment goals
  • No negative influence on oxygen input through wastewater content - α-factor is 1


With the Passavant® Surface Aerator Mammutrotor® Aqseptence Group offers you a universal solution which has been especially developed for aeration, circulation and stir mixing processes. More than 8,500 installations with a total length of approximately 52 km have meanwhile been deployed worldwide and the Mammutrotor® has become the byword for economic and reliable surface aeration.
Function Oxygen transfer occurs during the operation of the Mammutrotor® by means of an intensive turbulence of the phase boundary between the air and the wastewater/activated sludge mixture, directly at the aeration rotor. The flow energy which is simultaneously introduced ensures the requisite blending of the activated sludge, wastewater and oxygen. This ensures sedimentation-free operation in tanks with a depth of up to 3.5 m. In deeper tanks of up to 8 m, the mixing process is supported by additional agitators which allow an intermittent mode of operation, in addition to the continuous mode. The oxygen enrichment efficiency and the cost effectiveness of the system are further enhanced by the optional installation of guide baffles mounted transversely to the outflow of the aeration rotors.


Aeration Technology

Aeration tanks and the respective aeration equipment are at the core of modern biological wastewater treatment plants. Modern wastewater technology calls for efficient aeration systems which ensure a high level of technical flexibility...


Gaenserndorf WWTP

The customer requested several surface aerators Mammutrotoren 1000-7.5 inclusive guide baffle, brake shield and other equipment.


Lohne-Rießel WWTP

The wastewater treatment plant in Lohne-Rießel needs to replace an existing Mammutrotor® from the year 1975.The new rotor has to be delivered with a guide baffle and an aerosol protection device. The aeration tank can‘t be emptied during...


Suedzucker Location Ochsenfurt

The wastewater treatment plant of the sugar refinery in Ochsenfurt have had three floating Mammutrotors from the year 1973, which should be replaced due to heavy wear. After the refurbishment of the first aeriation pond at the beginning...


Locations and Contact


Aqseptence Group Co. Ltd., Hangzhou

Sales and Manufacturing Location
8 Chengye Road,
Binjiang District Hangzhou
Zhejiang Province, 310053

Tel: +86 0571 86698098

Fax: +86 0571 86698066



Aqseptence Group (India) Private Limited, Ahmedabad

Sales and Manufacturing Location
E-540, GIDC, Sanand-II Industrial Estate,
Village: Bol, Tak: Sanand,
Gujarat 382170, Ahmedabad

Tel: +91 2717 618000



Aqseptence Group FZCO, Dubai

Sales Location
East Side 5EA, 7th floor, 722
P.O. Box 371082
Dubai Airport Free Zone
United Arab Emirates
United Arab Emirates

Tel: +971 42278456



Aqseptence Group Pty Ltd., Brisbane

Sales and Manufacturing Location
88 Brickyard Road,
Geebung 4034 QLD
PO Box 85, Virginia DC,
QLD 4014

Tel: +61 7 3867 5555

Fax: +61 7 3867 5566



Aqseptence Group Carpi Srl, Limidi

Sales and Manufacturing Location
Via Pitagora 30
41010 Limidi Di Soliera, MO

Tel: +39 059 525720

Fax: +39 059 525443



Aqseptence Group SAS, Availles-en-Chatellerault

Sales and Manufacturing Location
Zone Industrielle
86530 Availles-en-Châtellerault

Tel: +33 5 4902 1600

Fax: +33 5 4902 1616



Aqseptence Group GmbH, Rimpar

Sales Location
Kettelerstrasse 5 -11
97222 Rimpar

Tel: +49 9365 8082 60

Fax: +49 9365 8082 50



Aqseptence Group GmbH, Aarbergen

Sales and Manufacturing Location
Passavant-Geiger-Strasse 1
65326 Aarbergen

Tel: +49 6120 280

Fax: +49 6120 28 2182


Explore our portfolio