Operating principle

  • The Biodiscs consist of a set of discs made of composite material, mounted and solidly attached to a shaft.
  • The shaft is slowly rotated by a planetary gear motor designed to operate 24 hours a day, with a speed of between 1 and 5 rpm, depending on the characteristics of the effluent to be treated.
  • The Biodiscs are partly submerged in the effluent to be treated. With its rotary movement, the discs alternate between contact with the wastewater (from which the microorganisms absorb their organic nutrients) and the oxygen in the ambient air (the other element necessary for the process), leading to the growth of a biological film that covers the entire surface of the discs.


• Strong variations of seasonal pollution load or hydraulic head

• Steep mountainous terrain

• Limited construction space
(< 0.1 m2 R.E.)


  • Perfectly suited to sudden hydraulic and/or organic load variations
  • Small footprint: for integration in small premises or in a small area
  • Fast and easy maintenance, no need for qualified personnel (no mechanical components between the two ends)
  • Bacterial flora operational within a period of 5 to 15 days, without seeding
  • Very low power consumption (approx. 0.25kWh/kg of DBO5 treated) • No noise or odour pollution
  • No bacteriological ris
  • No insect or rodent nuisance
  • No consumption of mains water (no cleaning, no watering)
  • Robustness: very high mechanical resistance steel shaft (30% better than stainless steel)

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