Fluidized bed biological carrier
This is a wastewater treatment method, which was first invented by Professor Hallvard Degaard of the University of Science and Technology in the late 1980s.
The MBBR system consists of an aeration tank (similar to an activated sludge tank) with a special plastic carrier that provides a surface on which biofilm can grow. The carrier is made of a material with a density close to the density of water (1 g/cm3). An example is high-density polyethylene (HDPE) with a density close to 0.95 g/cm3. The carrier will be mixed in the water tank through the aeration system, so there will be good contact between the substrate in the influent wastewater and the biomass on the carrier.