Microorganisms in a biofilm wastewater-treatment process are typically more resilient to process disturbances when compared to other types of biological-treatment processes. In the AnoxKaldnes Moving Bed Biofilm Reactor (MBBR) technology, the biofilm growth is protected within engineered plastic carriers that are designed with high internal-surface areas. With this technology, it is possible to handle extremely high loading conditions without clogging. An aeration grid located at the bottom of the reactor supplies oxygen to the biofilm along with the mixing energy required to keep the biocarriers suspended and completely mixed within the reactor. Treated water flows from the reactor through a grid or a sieve, which retains the MBBR biocarriers within the reactor. Depending on the wastewater, the reactors may be equipped with special spray nozzles that prevent excessive foam formation. The MBBR biofilm technology can be used as a standalone process, or it can be used to enhance the treatment of activated sludge processes. — Veolia Water Solutions & Technologies, Saint Maurice, France
This biofilm treatment system offers high surface areas
| By Chemical Engineering