MBBR biofilter media affinity for different types of microorganisms

MBBR (moving bed biofilm reactor) biofilter media affinity for different types of microorganisms is mainly reflected in the following aspects:
Physical structure provides attachment sites
Pore structure: MBBR biofilter media has a rich pore structure. These pores vary in size, providing a habitat for microorganisms of different sizes. For example, for smaller bacteria, such as nitrifying bacteria, they can penetrate into the tiny pores of the filler and grow and reproduce in a relatively stable environment. These pores are like "small rooms" that protect microorganisms from external factors such as water flow impact.

Specific surface area advantage: The biofilter media has a large specific surface area, which provides a wide space for microorganisms to attach. Different types of microorganisms can choose to attach to different locations on the filler surface according to their own growth characteristics and environmental requirements. For example, some filamentous microorganisms can use the larger plane area on the filler surface to extend and grow between the fillers like a bridge, while microorganisms such as cocci and bacilli can attach around filamentous microorganisms or other areas of the filler to form a complex and orderly microbial community.

Chemical properties create a suitable environment
Surface charge properties: The charge properties of the filler surface have an important influence on the attachment of microorganisms. If the filler surface has a suitable charge, it can attract microorganisms with opposite charges. For example, the cell membrane of some microorganisms has a negative charge. When the filler surface has a positive charge, the microorganisms are more likely to attach to the filler through electrostatic attraction. This electrostatic adsorption can selectively enrich some microorganisms that play a role in key links in the sewage treatment process, such as microorganisms that make important contributions to the decomposition of organic matter and denitrification.

Chemical stability of materials: The chemical stability of the filler ensures that it will not release harmful substances into the sewage during long-term operation, providing a safe growth environment for microorganisms. For some microorganisms that are sensitive to environmental changes, such as denitrifying bacteria, a stable chemical environment is the key to their survival and function. At the same time, fillers with stable chemical properties can tolerate acidic and alkaline substances and chemical agents in sewage, and will not change their surface properties due to chemical reactions, thereby continuously maintaining affinity for microorganisms.

Hydraulic conditions promote microbial selection and symbiosis
Fluidization and stirring: In the MBBR system, the fluidization and stirring process of the filler can make the microorganisms fully contact with the sewage, and also facilitate the communication and symbiosis between different types of microorganisms. Some aerobic microorganisms can use the dissolved oxygen in the water for metabolic activities on the surface of the filler or in the area near the surface, while anaerobic microorganisms around or inside the filler can use the intermediate products produced by the metabolism of aerobic microorganisms for anaerobic reactions. This microbial symbiotic relationship formed in the hydraulic environment of the filler reflects the synergistic effect of the filler's affinity for different types of microorganisms, which is conducive to improving the treatment efficiency of the entire sewage treatment system. For example, when treating sewage with high concentrations of ammonia nitrogen, nitrifying bacteria and aerobic denitrifying bacteria can cooperate with each other in different areas of the filler or at different levels in the same area to achieve an efficient denitrification process.

If you need high-quality MBBR biofilter media, please contact BioCell Environmental Technology for more questions.

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