Wastewater is treated through the aerobic process in FBBR-1 and FBBR-2. Sludge is first dried in the drying bed and then used as a fertilizer. Pathogens are removed with the help of chlorination. Traditionally Fluidized bed filter consists of a bed of granular media maintained in a constant state of expansion or fluidization.The media consists of particles with water negative buoyancy like sand, plastic beads, glass beads, crushed shells.

The biofilm in the fluidized bed reactors is evenly distributed throughout the reactor. In fluidized bed, each particle becomes coated with biofilm that grows as organics and other nutrients are extracted from the passing water.