1.Solid Separation Zone : This is the primary treatment process that could separate solid and scum from wastewater
2.Aeration Zone : The clear water flow into this stage. Oxygen supplied by air blower is required for the digestion of the bacteria cultures thriving in and around the plastic media inside the aerated zone, thus reducing the amount of contaminants while generating more contacts with the bacteria cultures on the surface area of the media. The quality of water becomes better.
3.Sedimentation Zone : The next step of treatment involves the sedimentation where organic waste are settled in the sedimentation zone. The settled waste in the bottom of the tank can then be pumped back to the solid separation as a return sludge. To ensure that quality of effluent would pass the standard effluent, chlorine is offered before discharging the effluent into public mains.