Moving Bed Bio Reactor (MBBR)


Moving Bed Bio-Reactor (MBBR) processes improve reliability, simplify operation, and require less space than traditional wastewater treatment systems (ASP).

MBBR technology employs thousands of polyethylene biofilm carriers operating in mixed motion within an aerated wastewater treatment basin. Each individual bio carrier increases productivity through providing protected surface area to support the growth of heterotrophic and autotrophic bacteria within its cells. It is this high-density population of bacteria that achieves high-rate biodegradation within the system, while also offering process reliability and ease of operation. This technology provides cost-effective treatment with minimal maintenance since MBBR processes self-maintain an optimum level of productive biofilm. Additionally, the biofilm attached to the mobile bio carriers within the system automatically responds to load fluctuations.

The advantages that are attached with this technology are:

  • Compact Design – A fraction of the size of ASP

  • Expandable – Capacity could be easily upgraded by increasing the biofilm carrier

  • No Return activated sludge stream required

  • High Response to shock load

  • Minimal maintenance of MLSS

Moving Bed Biological Reactor

The Ionberg provides clients Moving Bed Biological Reactor that primarily removes wastewater in three stages that are Primary Settlement, Aeration and Final Settlement. This robust treatment plant is simple in design and suitable for broad range of applications. This system can be supplied and installed with air blowers. Apart from this, minimum civil work is required.



Primary Settlement : Initial settlement of wastewater and separation of gross solids occurs in the primary settlement tank. The gross solids in the wastewater form sludge at the bottom of the tank and lighter social debris forms a crust on the surface. The settled liquor that is contained between the sludge and crust passes forward through an outlet filter for treatment in the Aeration Chamber.


Aeration : The Moving Bed Biological Reactor (MBBR) employs a submerged media onto which micro organisms attach. This biomass requires oxygen to flourish. This is supplied by aerating the liquid in the chamber. The biomass retained on the media provides effective treatment for effluent. The media are kept in motion by the course bubble aeration. The air introduced into the tank ensures thorough mixing and turnover of the media within the reactor.


Final Settlement : The effluent passes forward for the final stage of treatment and enters the final settlement tank through a stilling well. This slows the velocity of the effluent and allows any remaining fine solids to settle. The base of the tank is coned allowing final settlement of the effluent to take place with minimal disturbance to any settled particles. The return sludge pump is located at the base of the tank and any remaining fine solids are returned via a sludge return line to the primary settlement tank. The treated effluent emerges from the system through the outlet for disposal.

Benefits of MBBR

  • High Treated effluent Quality

  • Small Footprint

  • Robust Treatment Plant (concrete tanks)

  • Below Ground Installation

  • Simplicity of Design, Installation & Operation

  • Suitable for a Broad Range of Applications

  • The MBBR treatment process can be provided for a new sewage treatment works or for retrofitting or upgrading existing wastewater treatment plants where a higher treated effluent.

Advantages over Conventional ASP :


  • The MBBR system is a great improvement over Conventional Extended Aeration or Activated Sludge Plants, and provides a robust and compact unit in a fully enclosed design.

  • No sludge re-circulation is required to maintain MLSS as in the case of conventional aeration system.

  • Can be designed to any size to deal with larger flow and loads. Around- 10 m3 to 1000 m3/day

  • Fine bubble diffused aeration used generally reduces the energy requirements as compared to surface aerators.

  • The tank does not need to be drained for access to the diffusers or media.

  • MBBR system takes higher shock loads without reducing the plant performance because of large quantity of MLSS available inside the reactor.

  • FAB supports low sludge generation, low Adour and low Visual impact.

  • Maintenance requirements are simple.

Benefits :

  • Hydraulic Retention Time (HRT) of 4-6 hours vs 10 – 16 Hours.

  • Solids Retention Time (SRT) of 15-365 days, can vary based on flow without negative process impact.

  • Modular expandability.

  • Highest quality effluent.

  • Less susceptible to upsets due to flow variations.

  • Less odor.

  • Simple, yet sophisticated