Moving Bed Biofilm Reactor (MBBR) is a new type of biofilm sewage treatment process between biological contact oxidation and biofluidized bed method, which solves the problem of filter material blockage in biological contact oxidation method, and also overcomes the shortcomings of difficult three-phase separation in biofluidized bed, and has good treatment effect.
The moving bed biofilm reactor uses a granular material with a density close to water as the carrier of the biofilm, continuously introduces sewage into the reactor and aerates it at the same time, creating good mixed contact conditions, and using the biological activities of microorganisms to achieve the purpose of purifying sewage. The moving bed biofilm reactor has the characteristics of high microbial concentration and long food chain, and has a strong adaptability to the flow rate and concentration changes of the influent water. At the same time, because the density of the selected biofilm carrier is close to that of water, the energy consumption of the fluidization process is reduced, the mass transfer rate is increased, and the clogging is not easy to occur, and the amount of residual sludge is significantly less than that of the activated sludge method. In addition, due to the compact structure of this method, it has the characteristics of less land occupation and low energy consumption, which significantly reduces the cost of investment and operation and maintenance. All these advantages make the moving bed biofilm reactor widely used in the sewage treatment process.