Introduction to MBBR sewage treatment process and comparison with MBR and FBR

1、 Overview of MBBR Process
MBBR process, also known as moving bed biofilm reactor, is a sewage treatment technology based on biofilm method. By adding a specific amount of suspended carrier to the reactor, this process effectively increases the biomass and biodiversity inside the reactor, thereby improving treatment efficiency. These carriers have a density similar to water, so they can be fully mixed with water during aeration, providing a suitable growth environment for microorganisms in the three phases of gas, liquid, and solid.
In water, these carriers make air bubbles smaller through collision and shear, thereby improving the efficiency of oxygen utilization. It is worth noting that different microbial populations grow on both the inner and outer sides of each carrier. The interior is mainly composed of anaerobic or facultative bacteria, while the exterior is mainly composed of aerobic bacteria. This design makes each carrier a miniature reactor, allowing for simultaneous nitrification and denitrification reactions, thereby further optimizing the treatment efficiency.