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Germany, Austria, Switzerland


Passavant® Mammutrotor Lago

Specially developed for municipal and industrial pond-style wastewater treatment plants or small conventional wastewater treatment plants with circulation flow: The Mammutrotor® Lago convinces with an innovative drive concept and low maintenance requirements.

Unique Features

  • Constant oxygen input and efficiency over entire life cycle
  • No negative influence on the oxygen input in case of varying wastewater characteristics – α-factor is close to 1
  • Embedded guide baffle for high energy efficiency and direct flow to deeper water layers
  • Innovative drive concept without coupling
  • Many options available for addition


A clear advantage over other aeration technologies for lime-containing, solids-laden or warm wastewater: the Passavant Mammutrotor® has become the epitome of economical and reliable surface aeration by being used in now more than 8,500 installations worldwide. With the further development Mammutrotor® Lago, the system is now also used in small installations.

The heart of the system is the aerator roller, a central shaft with a clamped-on star configuration made of glass-fibre reinforced plastic. The arrangement is slightly coiled so that low-noise and shock-free operation is guaranteed. For durable and low-maintenance operation over many years, we rely on a drum motor with integrated gearbox. The minimal maintenance effort (oil change after 20,000 to 50,000 hours) as well as a rich optional delivery programme complete the advantages.

Passavant® Mammutrotor® Lago

Efficiency Improvement for Ditches