Moving Bed Biofilm Reactor (MBBR) media is a type of filtration media used in wastewater treatment systems. It consists of small, floating plastic pieces that provide a surface area for beneficial bacteria to grow and break down organic matter in the wastewater. The movement of the media within the reactor helps to keep the bacteria in suspension and maximizes contact between the bacteria and the wastewater, increasing efficiency. MBBR systems are commonly used in bothmunicipal and industrial wastewater treatment plants.