How does MBBR filter bio media work ?

MBBR (Moving Bed Biofilm Reactor) filter bio media work by providing a surface for the growth of beneficial microorganisms that form a biofilm. Here's how the MBBR process with bio media works:

Introduction of Wastewater: The wastewater to be treated is introduced into the MBBR reactor or tank.

1.Addition of MBBR Bio Media: The MBBR bio media, which are small plastic or composite particles, are added to the reactor. These media are designed to have a high specific surface area to facilitate biofilm growth.

2.Attachment of Microorganisms: The microorganisms responsible for wastewater treatment, including bacteria, attach themselves to the surface of the MBBR bio media. Initially, free-floating microorganisms in the wastewater start to attach to the media.

3.Biofilm Formation: As more microorganisms attach to the media surface, a biofilm starts to form. The biofilm consists of a complex matrix of microorganisms, including bacteria, fungi, and protozoa. The biofilm provides an environment for diverse microbial communities to thrive.

4.Wastewater Treatment: The biofilm on the MBBR bio media acts as a biological filter. As the wastewater flows through the reactor, it comes into contact with the biofilm. The microorganisms in the biofilm break down and metabolize organic pollutants, converting them into simpler forms.

5.Oxygen Supply: Adequate oxygen supply is crucial for the microbial activity within the biofilm. Oxygen can be supplied through aeration or agitation of the wastewater, allowing the microorganisms to perform aerobic degradation of organic matter. The movement of MBBR bio media helps in oxygen transfer, ensuring sufficient oxygen reaches the biofilm.

6.Nutrient and Pollutant Uptake: The microorganisms in the biofilm utilize nutrients, such as nitrogen and phosphorus, present in the wastewater. They also uptake and metabolize organic pollutants, improving water quality.

7.Sloughing and Regeneration: Over time, a portion of the biofilm will naturally slough off from the MBBR bio media due to microbial activities and external forces. This sloughed biomass may contribute to the treatment process or be removed as part of the solids handling. The continuous motion and mixing of the MBBR bio media help to regenerate the biofilm.

By utilizing the MBBR process with bio media, the surface area provided by the media offers a favorable environment for the growth of microorganisms, enhancing their ability to degrade organic matter and remove pollutants from the wastewater. The MBBR system's efficiency depends on factors such as proper media selection, appropriate wastewater characteristics, and effective aeration for oxygen supply to support the microbial activity within the biofilm.