The proposed aerobic treatment system for wastewater is a compact and effective system using the revolutionary MBBR technology. MBBR or Moving Bed Biofilm Reactor as the name suggests is a high rate attached growth aerobic treatment system wherein the bacterial growth takes place on a media submerged in wastewater. MBBR process uses the floating type plastic media for the attached growth process. The principle of Moving Bed bioreactor is to provide a continuously operating bio-film reactor, which is non-clog gable, does not require backwashing and has a very low pressure drop. This is achieved by growing the bio-film on small carrier elements that move freely in the wastewater in the reactor. The air stream constantly keeps the bio media in suspension and at the same time provides the required oxygen to the biomass. Treatment units based on MBBR are operating successfully worldwide, as the technology is rugged and simple to operate