m-MBBR® - www.rsewater.com

Setting the Standard in Modular Wastewater Treatment

The m-MBBR® system delivers a modular, adaptable, and low-carbon approach to wastewater treatment. The solution has been engineered for rapid deployment, repeatability, and high-performance treatment, ensuring it can support clients across a diverse range of sectors.

Using biofilm carriers and integrated aeration, it removes BOD, ammonia, and suspended solids with exceptional consistency.

The m-MBBR® consists of compact, plug-and-play modules which are off-site fabricated and factory tested, enabling rapid deployment at scale.

With its high biomass concentrations and longer sludge retention times, it effectively handles load variations, toxicity, and achieves high-quality water treatment.

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Submerged Biofilm Carriers: Provide a large surface area for microbial growth.
Continuous Mixing: Aeration ensures uniform mixing and optimised oxygen transfer, provided by duty/standby blowers.
Fully Automated: Integrated control room with control system suitable for remote operation.
Versatile: Suitable for preliminary, secondary, tertiary, and side-stream applications, market-leading flow range through the standard products.

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BOD Reduction

The standard m-MBBR® module is configured as a 3-stage biological reactor with an integrated 2-phase solids separation stage. Dividing the biological reactor into 3 separate but interconnected stages is proven to improve BOD removal efficiencies.

BOD & TN Reduction

The first stage reactor of the m-MBBR® is configured as an anoxic zone, where denitrification of the nitrified liquors from the third stage reactor takes place.

The second-stage reactor is dedicated to BOD removal, with additional BOD and ammonia reduction achieved in the third-stage reactor before the 2-Phase solids removal stage.

This configuration of m-MBBR® will also provide beneficial levels of alkalinity within the treated water discharge.

BOD & NH4 Reduction

The standard m-MBBR® module is configured as a 3-stage biological reactor. The first and second stages are used for BOD reduction. The third and final stage is used for nitrification of the treated wastewater before the 2-Phase solids removal stage.

Tertiary Nitrification

For existing works that are failing to meet ammonia discharge consents, the m-MBBR® can be configured to provide a very cost-effective nitrification stage that can be operated as a stand-alone facility or integrated within the existing works as a side-stream reactor.

Fully automated biological treatment with integral solids separation.

There are 3 stages of biological m-MBBR® treatment, depending on the configuration for:

1. BOD Reduction
2. BOD and Nitrification
3. BOD and Total Nitrogen Reduction (Nitrification and Denitrification)

Following biological treatment, a 2-phase separation stage is used to produce solids and a high-quality effluent with a low total suspended solids concentration.

Dimensions

Model Number

Duty

14.0 x 2.5 x 3.0 (L x W x H)

88%

10.1

10.2

10.3

106%

BOD & TSS

BOD, NH4 & TSS

BOD, TN & TSS

15.0 x 4.0 x 3.7 (L x W x H)

20.1

20.2

20.3

BOD & TSS

BOD, NH4 & TSS

BOD, TN & TSS

18.0 x 4.0 x 3.7 (L x W x H)

88%

30.1

30.2

30.3

106%

BOD & TSS

BOD, NH4 & TSS

BOD, TN & TSS

Fully automated biological treatment with integrated blowers and controls.

Where solids separation is not required, but BOD removal with nitrification or combined BOD and total nitrogen reduction is needed, the bio unit is a suitable option.

It incorporates the 3 stages of MBBR biological treatment, similar to the evo m-MBBR®. The bio unit offers higher treatment capacity due to the absence of a solids separation stage.

Dimensions

Model Number

Duty

12.0 x 2.5 x 3.7 (L x W x H)

12.0 x 4.0 x 3.7 (L x W x H)

18.0 x 4.0 x 3.7 (L x W x H)

88%

106%

BOD and/or NH4

The airo m-MBBR® is a single-stage biological MBBR process. Suitable for higher flow and load applications than the evo and bio m-MBBR® models, and operates without solids separation.

The airo m-MBBR® can be applied for either BOD or ammonia (nitrification) reduction, and reactors can be combined in a series to provide full treatment, with solids separation in an independent process.

The airo m-MBBR® model is particularly suitable for higher flow applications to significantly reduce load or for tertiary nitrification.

Dimensions

Model Number

Duty

12.0 x 2.5 x 3.7 (L x W x H)

12.0 x 4.0 x 3.7 (L x W x H)

18.0 x 4.0 x 3.7 (L x W x H)

88%

106%

BOD or NH4

Proven to provide a number of important operational benefits compared to other wastewater treatment processes.

Our m-MBBR® technology is an efficient, adaptable and resilient process that combines excellent performance with exceptional levels of process security.

The m-MBBR® can achieve over 90% BOD and ammonia removal during early startup phases, with up to 67% lower embodied carbon than traditional site-built wastewater treatment plants.

m-MBBR® systems utilise carrier biofilm technology that has undergone continual improvement and development over more than 30 years of global operating experience.

Plug-and-play installation, customisable to site-specific needs and suitable for both municipal and industrial applications.

Achieves high removal rates for organic matter and nitrogen, to achieve compliance with discharge consents.

The integrated 2-phase separator allows automatic solid separation, ensuring high-quality effluent before discharge.

Offers a small footprint with easy scalability to meet future treatment needs compared to competing technologies.

The m-MBBR® achieves superior treatment performance at a lower lifetime cost than conventional, on-site built alternatives.

Constructed and tested at our state-of-the-art modular assembly facilities using the very best of low-carbon manufacturing methods and carefully sourced materials.

m-MBBR® solutions can be vinyl wrapped to meet local environmental requirements and site specifications.

m-MBBR® modular water recovery solutions are available on a capital and rental basis*. *Minimum rental period required.

m-MBBR® Design and Manufacture

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Designed and manufactured at our state-of-the-art fabrication facilities near Inverness, the m-MBBR® modular systems in our evo range are available in three standard sizes, with four different configurations available for each size of module.

All standard evo m-MBBR® systems can be transported to site using conventional road transportation and be made fully operational within a short period of time, making them suitable as a permanent installation or temporary solution for our clients.

67%

99.9%

88%

RSE modular m-MBBR® solutions are fabricated and tested at our state-of-the-art assembly facilities using the very best low-carbon manufacturing methods. m-MBBR® provides up to a 67% reduction in embodied carbon when compared with traditional activated sludge solutions.

106%

m-MBBR® systems successfully treat wastewater flows of over 150,000m3/d down to as little as 25m3/d, a reduction of up to 99.9%. Biofilm treatment processes are synonymous with higher biomass concentrations and longer sludge retention times, making the m-MBBR® process exceptionally resilient to load variations, toxic shocks and particularly proficient at nitrifying ammonia.

The m-MBBR® modular wastewater treatment system was recognised as the winner of the 2025 ICHEME Global Award for Water.

This highlights the impact of the m-MBBR® product as a next-generation solution for wastewater treatment which combines efficiency, scalability and sustainability with engineering excellence that underpins every RSE innovation.

Winning this IChemE award is an important milestone, but it also fuels our ambition to continue pushing innovation in wastewater treatment.

The m-MBBR® system is part of our wider strategy to develop smart, sustainable, and modular product solutions that support the needs of the water sector now and into the future.

Backed by remote automation, lease options, and flexible capacity, the m-MBBR® sets a new standard for sustainable, resilient, and scalable wastewater treatment.

Standard applications include municipal, industrial, and emergency effluent treatment.

A comprehensive range of client support packages is available on either a short or long-term basis.

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Setting the Standard in Modular Wastewater Treatment

Dimensions

Model Number

Duty

88%

106%

88%

106%

Dimensions

Model Number

Duty

88%

106%

Dimensions

Model Number

Duty

88%

106%

m-MBBR® Design and Manufacture

67%

99.9%

88%

106%

Start your enquiry into our range of m-MBBR® technologies.