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Rotary biological treatment

The rotary biological deposit allows for exceptionally effective and environmentally friendly removal of various contaminants. This type of treatment is possible thanks to BioDisc® system from Klargester (currently part of the international Kingspan Environmental group), which is based on four active treatment zones that “fit” into one tank.

Thanks to such a construction, the method is not only highly effective, but also possible to apply in various conditions. The tank can be installed both inside and outside the building. It is not large, and its appearance does not interfere with the aesthetics of a place where it is located. The GRP tanks are characterized by high resistance to various environmental conditions – hence the high degree of versatility of their use.

Basic principles of treatment plants with rotary biological deposit

In one tank, there are four separate zones responsible for treatment processes.


These are: primary settling tank, where sludge is formed from solid and non-biodegradable particles (removed from time to time). The water free of the biggest pollutant particles is then directed to the disc bed (first), where the aerobic treatment takes place. Oxygen is absorbed into the biomass produced here. The liquid flows between the different parts of treatment plant by means of buckets. Thanks to them less and less polluted water is transferred to the next disc zone. Then, in the second part of disk bed, the purification process takes place – also with the help of oxygen. Here, another layer of biomass is created – the bacteria use the contents of wastewater for this, thus leading to further water purification. Finally, in the secondary settling tank, the almost completely treated wastewater and dead bacteria from the other zones are removed via a discharge pipe. In this process, different treatment methods – mechanical and biological – are effectively combined.

The rotary biological deposit is the key to the entire process. The oxygen necessary for the aerobic bacteria to grow and “work” is supplied by a slow-speed motor. In the whole purification process it is also important that the biological membrane, in which the above mentioned bacteria live, can be formed. Bacteria feed on organic contaminants – thus the wastewater is finally cleaned and can now safely (for the environment) leave the tank.

The entire system ensures a regular flow of treated wastewater. Its advantage is also its simplicity – it is easy to transport, install, and later operation.
Specialized control panel allows efficient management of the plant – the panel informs about the current status of the system, as well as about all possible irregularities. This allows the plant owner to react quickly in case of failure.

Main features of treatment plants based on rotating biological deposit:

  • Hold relevant CE certificates, operate in accordance with national standards.
  • Highly effective.
  • Do not emit unpleasant odors.
  • Operate efficiently and quietly.
  • Easy to install and operate.
  • Minimal breakdowns.
  • Low operating costs.