Moving Bed Bio Reactors (MBBR)

Moving Bed Biofilm Reactor (MBBR) is a Activated Sludge Biological Treatment Process wherein fixed film Moving Media are used. The MBBR system consists of an aeration tank with special plastic carriers that provide a surface where a biofilm can grow. The carriers will be mixed in the tank by the aeration system and thus will have good contact between the substrate in the influent wastewater and the biomass on the carriers.To prevent the plastic carriers from escaping the aeration it is necessary to have a sieve on the outlet of the tank.

The MBBR process utilizes floating media within the aeration tank to increase the amount of microorganisms available to treat the wastewater. The microorganisms consume organic material. The media provides increased surface area for the biological microorganisms to attach to and grow in the aeration tanks. The increased surface area reduces the footprint of the tanks required to treat the wastewater. It is this high-density population of bacteria that achieves high-rate biodegradation within the system, while also offering process reliability and ease of operation. The media is continuously agitated by bubbles from the aeration system that adds oxygen at the bottom of the first compartment of the aeration tank. The microorganisms consume organic material. When compared to conventional secondary treatment it provides superior efficiency and value.

Advantages of Moving Bed Bio Reactors (MBBR)

Being a Biofilm processes in general require less space than activated sludge systems
Don't need a recycling of the sludge, which is the case with activated sludge systems.
an existing treatment plant can retrofitted to increase its capacity without a new tank.
Higher effective sludge retention time (SRT) which is favorable for nitrification.
Responds to load fluctuations without operator intervention.
Lower sludge production.
Resilient to toxic shock.
Process performance independent of secondary clarifier (due to the fact that there is no sludge return line).


Waste Water Treatment
Sewage Treatment