Raw sewage flows into the primary settling tanks that can be carried out using a multi-chamber-pit; solids settle in the tanks while the homogeneous liquid flows to the equalization tank to regulate steady flow to the Bio-disk® reactors.

The Bio-Disk (RBC) is a fixed-film, aerobic, biological wastewater treatment system. It features parallel PP disks mounted perpendicularly on a slowly rotating shaft,  allowing the rotating disks to carry biomass and a film of wastewater into the air for oxygen absorption. As oxygen and organic materials diffuse into the biomass, they are metabolized.

After biological treatment, the mixed liquor flows to a smart clarifier that consists of lamella plates for ideal separation. The concentrated sludge that accumulates on the bottom of the clarifier is pumped back or flows by gravity to the primary tank while the clear effluent flows from the top for post-treatment (UV) or discharge.