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About MBR & MBBR

MBR (Membrane Bioreactor) and MBBR (Moving Bed Biofilm Reactor) are two advanced technologies used in wastewater treatment for both Effluent Treatment Plants (ETPs) and Sewage Treatment Plants (STPs). These technologies are designed to improve the efficiency of biological treatment processes, ensuring the removal of contaminants and the production of high-quality treated water.

MBR (Membrane Bioreactor):

MBR combines conventional biological treatment with membrane filtration. The biological treatment occurs in an activated sludge process, where microorganisms break down organic pollutants.

The key feature of MBR is the use of a membrane system (typically microfiltration or ultrafiltration membranes) to separate treated water from the activated sludge.


  • Enhanced removal of suspended solids and pathogens due to the membrane barrier.
  • Compact design, as it eliminates the need for a separate settling tank.
  • High-quality effluent with low turbidity and suspended solids.


  • Suitable for industrial wastewater with high variability and fluctuating loads.
  • Used in decentralized systems and areas with limited space.


  • Membrane fouling can occur, requiring regular maintenance and cleaning.
  • Higher operational and capital costs compared to conventional treatment processes.

MBBR (Moving Bed Biofilm Reactor)

MBBR utilizes suspended plastic media carriers in the treatment tank, providing a surface for the growth of microorganisms.
Wastewater flows over the biofilm-covered media, allowing microorganisms to break down organic matter.


  • Increased biological treatment efficiency due to the large surface area provided by the media.
  • Resilient to shock loads and variations in influent characteristics.
  • Can be retrofitted into existing treatment plants.


  • Effective for both municipal and industrial wastewater treatment.
  • Widely used for upgrading existing activated sludge systems.


  • Proper control and monitoring are essential to prevent clogging and ensure optimal biofilm development.
  • Media maintenance and replacement may be required over time.

Application in ETP (Effluent Treatment Plants) and STP (Sewage Treatment Plants):

Effluent Treatment Plants (ETP):

MBR and MBBR technologies are applied in industrial ETPs to treat effluents containing various pollutants.
MBR is suitable for industries with strict discharge standards, providing high-quality effluent.

Sewage Treatment Plants (STP):

Both MBR and MBBR are used in STPs to treat municipal sewage and ensure compliance with environmental regulations.
MBBR is often chosen for its flexibility in handling varying loads and its ease of integration into existing treatment facilities.

In summary, MBR and MBBR technologies play crucial roles in enhancing the efficiency and effectiveness of wastewater treatment in both ETPs and STPs, contributing to the production of treated water that meets stringent quality standards. The choice between MBR and MBBR depends on factors such as the nature of the wastewater, space availability, and treatment goals.



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