- Filling stage: A portion of the wastewater that has been collected in the pre-treatment tank, and its solids are transferred to the aeration tank.
- Aeration Stage: Wastewater is alternately aerated and mixed into the polyethylene tank. Thus, activated sludge is formed which contains the microorganisms needed for wastewater treatment. Aeration and rest times can be adjusted based on actual biological needs. The excess sludge is transferred to the primary treatment tank and then discharged with the sewage sludge. If no wastewater is added during the aeration phase, the system automatically switches to energy storage mode.
- Sedimentation stage: The activated sludge settles on the bottom of the aeration tank. Clean water is collected at the top of the tank.
- Drain stage: Clean water is pumped out of the tank through the outlet.