What is MBR technology? How MBR technology works and the advantages of MBR technology?

 

'Membrane bioreactor' (MBR) is generally a term used to define wastewater treatment processes in which the membrane is selectively bending, such as microfiltration or ultra filtration. It is integrated with biological processes, particularly bioreactors with suspended growth. MBRs differ from membrane-based 'polishing' processes as a separate tertiary treatment step without aggressive biomass being returned to biological processes. Almost all commercial MBR processes available today use a membrane as a filter. It separates solid materials developed by biological processes. As a result, the product effluent is clarified and disinfected.

 

How will the MBR technology work?

Membrane bioreactor wastewater treatment combines conventional biological processes, i.e. activated sludge, with membrane filtration technology. You can say that the membrane bioreactor working principle is about the smart combination of membrane technology and biological treatment. 

 

  • In the MBR technology system, the semi-permeable membrane, a two-dimensional material (micro and ultra filtration), is immersed in an aerated bioreactor.
  • This level of filtration allows superior quality sewage to be drawn through the membrane.
  • It also aids in sludge removal and filtration processes often used in wastewater treatment.
  • Due to the need for precipitation is removed. Biological processes can therefore work more efficiently.
  • Thorough screening or pre-treatment before waste enters the membrane tank. It protects the membrane and prolongs its service life by reducing solid waste buildup.

 

What are the advantages of MBR technology?


Loosen the HRT and SRT connections:

The key advantage of membrane bioreactor processes is that they are biological solids (mixed liquor or sludge) that are completely stored in the bioreactor. This means that the solid retention time (SRT) in the bioreactor can be controlled independently of the hydraulic retention time (HRT).

 

High-quality wastewater:

The small pore size (<0.5 µm) of the membrane means that the treated waste is very clear, and the concentration of pathogens was significantly reduced compared to the CAS process. The MBR process provides effluent that is clearly clarified and sterilized of a quality that is high enough to be discharged to a sensitive receiving facility or recycled for applications such as urban irrigation, utilities, or toilet flushing. They are also high-quality enough for direct feeding to reverse osmosis processes.


Small footprints:

Solids retention in the reactor and increased SRT to create higher biomass concentrations affect the plant's footprint. Increased concentration means that the total mass of the same solid is contained in a smaller volume. So the footprints are smaller.

 

Better biological therapy:

Finally, longer solids retention times tend to provide better overall biological treatment. Such conditions promote the development of slower-growing microorganisms. In particular, nitrifying MBRs are particularly effective in the biological removal of ammonia.

Although MBR technology is not always the best wastewater treatment method, but it can sometimes be more expensive than other solutions, such as MBR. It is increasingly becoming an alternative technology for water and wastewater applications requiring high-quality treated water or where free space is limited.

 

Application of MBR technology:

Typical applications include wastewater from beverage factories, dairies, bakeries, fruit and vegetable processing plants, meat processing and packaging plants, petrochemical plants and refineries. Small communities or developments that do not have access to municipal sewers may benefit from the small footprint and simplicity of the MBR.

The waste from the MBR is quite pure. Both BOD and TSS are typically eliminated to less than 5 mg/L, which makes the technology suitable for reuse in irrigation systems and the water in the cooling tower washing the toilet use on the ground or used as raw water for further purification and recycling.

MBR is currently used in over 200 countries, and global market growth rates of up to 15% are regularly reported in various markets analyzes.

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