movingbed

A moving bed is a type of biological reactor used in wastewater treatment. In a moving bed biofilm reactor (MBBR), small, buoyant plastic carriers are suspended in the wastewater. These carriers provide a large surface area for the growth of a biofilm, which is a community of microorganisms. As wastewater flows through the reactor, the microorganisms in the biofilm consume organic pollutants and nutrients. The constant movement of the carriers within the reactor ensures that the biofilm is constantly exposed to fresh wastewater and oxygen, leading to efficient treatment.

The moving bed system is characterized by its simplicity and robustness. The plastic carriers are typically made of high-density polyethylene and have a high surface area-to-volume ratio, which maximizes the space available for biofilm growth. The carriers are kept in suspension by the aeration system, which also supplies oxygen to the microorganisms. Screens or sieves are used to retain the carriers within the reactor while allowing treated water to pass through.

Moving bed reactors are known for their compact design and ability to handle fluctuating influent loads. They are often used for secondary treatment, nitrification, and denitrification processes. The biofilm on the carriers adapts to the wastewater composition, making the system resilient to changes. This technology offers a cost-effective and efficient solution for biological wastewater treatment.