SBR system

SBR system
SBR system

The SBR wastewater treatment plant is an activated sludge solution in a so-called biological sequential reactor. SBR technology works well in the treatment of wastewater from residential units, but also collective facilities such as hotels, restaurants or passenger service areas. A well-controlled technological process allows for a high reduction of nutrients (nitrogen, phosphorus).

The SBR system, i.e. the sequential biological reactor, is characterized by high efficiency and full automation of the wastewater treatment process. SBR wastewater treatment plants are used primarily in the municipal industry, however, properly selected and designed, they can effectively cope with even the most difficult industrial wastewater. The method of operation of the SBR sewage treatment plant is based on a process carried out in several cyclically repeating phases in one reactor vessel. A properly conducted biochemical reaction comes down to the appropriate contact time and control of the amount of activated sludge. One treatment cycle usually takes 6 to 8 hours. During its duration, the following takes place:

  • Filling the reactor with raw, mechanically pre-treated sewage.
  • Anaerobic denitrification process when mixing raw wastewater with reactor contents.
  • Aerobic nitrification process during reactor aeration by means of blowers and aeration grids.
  • Chemical precipitation of phosphates by coagulation.
  • Pumping out of excess sludge and precipitated phosphates.
  • Discharge of treated sewage from the treatment plant.

The treated effluent discharges to the receiver, i.e. watercourses, drainage ditches, flow-through reservoirs or is drained into the ground. Part of the treated effluent is recirculated to the first treatment chamber. The SBR system is intended for difficult wastewater, especially when it is necessary to remove the so-called nutrients, i.e. compounds of nitrogen and phosphorus. It requires constant operational care and technological knowledge in the field of working with activated sludge. However, it will provide a seasoned operator with many options for solving demanding problems in any wastewater treatment plant.