When number of micro organisms grow on surfaces of moving parts, they are called Bio-film. In Moving Bed Biofilm Reactor technology, the Bio-film grow, in the protected way, on engineered plastic packing with high internal surface area, which are freely suspended, thorough mixed through the liquid phase and in continuous movment within the reactor of specified volume, degrade the contaminant. These contaminant that need to be removed in order to treat the wastewater are food for growth of the Bio-film.
Therefore, the Bio-carrier design is critical due to requirements for sufficient transfer of food and oxygen to the microorganisms. The Bio-carriers are usually made of polypropylene (PP) and have specific gravity somehow alike wastewater. Engineered design of aeration systems of the reactor supplies oxygen to the Bio-film alonge with the mixing energy required to keep the Bio-carriers suspended and completely mixed within the reactor. In order to remove the sloughed off biomass from the aerated wastewater, sedimentation is employed after the aeration tank.
Advantage of MBBR Process
- Smaller footprint area
- Ease in operation and maintence
- Operator skills required are minimal
- System less susceptible toupset conditions(shock loading, power failure etc.)
- Lower energy requierments
- No clogging or chocking of the madia