Moving Bed Biofilm Reactor
MBBR System
Biological Treatment System for High-Rate BOD and Nutrient Removal
FRC’s MBBR system uses floating biofilm media in aerated tanks to reduce BOD, nitrogen, and phosphorus with no need for RAS or MLSS monitoring.
FRC’s Moving Bed Biofilm Reactor (MBBR) is a high-rate biological treatment system that supports dense microbial growth on suspended carrier media. The result is a compact, self-regulating process that efficiently removes BOD, nitrogen, phosphorus, and COD without the operational burden of traditional activated sludge systems.
The MBBR process uses specialized plastic carriers suspended in an aerated tank to provide a high surface area for biofilm growth. As wastewater flows through the tank, bacteria living on the carrier media consume organic contaminants (BOD/COD) and nutrients such as nitrogen and phosphorus. Aeration keeps the carriers in motion and supplies oxygen. Excess biomass naturally sloughs off and is removed in downstream treatment. No sludge return or manual wasting is required, allowing for hands-off operation.
Key Features
High surface area media for elevated biomass concentration
No Return Activated Sludge (RAS) or MLSS monitoring required
Automated, low-maintenance biological treatment
Compact footprint with scalable tank design
Durable stainless-steel or concrete tank construction
Compatible with DAF or clarifier solids removal
Specifications
Fill Volume: 30 – 70% of tank with carrier media
Construction: Stainless-steel or concrete tanks
Operation: Fully automated, no RAS or MLSS management
Options
High-efficiency aeration blowers and diffusers
Carrier media (see MBBR Media section)
DO, ORP, pH, and temperature instrumentation
SCADA-ready control panels
Catwalks, platforms, and retrofit kits
Applications
Industrial BOD/COD removal
Municipal wastewater and decentralized plants
Nutrient reduction for nitrogen and phosphorus
Plant upgrades and retrofits with space constraints
Why choose an MBBR system?
FRC’s MBBR offers robust performance with minimal operator input, making it the ideal solution for biological wastewater treatment in modern, space-conscious plants.
MBBR FAQ
Q: Why use MBBR instead of traditional activated sludge?
A: MBBR doesn’t require RAS return or MLSS monitoring, resulting in lower operational complexity and cost.
Q: Can I expand my MBBR system later?
A: Yes. You can scale up treatment simply by adding more carrier media and aeration capacity.
Q: What contaminants does MBBR remove?
A: It removes BOD, COD, ammonia, nitrogen, and phosphorus, depending on design.
