Aerobic Wastewater Treatment

Aerobic wastewater treatment systems that produce high-quality secondary effluent for safe discharge

Aerobic wastewater treatment including activated sludge, fixed biofilm and biofiltration to break down waste.

We offer a full range of aerobic treatment systems that produce high-quality secondary effluent from industrial wastewater or sewage. Our technologies include conventional activated sludge, moving bed biofilm reactors (MBBRs) and membrane bioreactors (MBRs).

What is aerobic wastewater treatment?

Aerobic treatment of wastewater is a biological process that uses oxygen to break down organic contaminants and other pollutants like nitrogen and phosphorous. Oxygen is continuously mixed into the wastewater or sewage by a mechanical aeration device, such as an air blower or compressor. Aerobic microorganisms then feed on the wastewater’s organic matter, converting it into carbon dioxide and biomass which can be removed.

What is aerobic wastewater treatment used for?

Aerobic treatment is usually used to polish industrial wastewater pre-treated by anaerobic processes. This ensures the wastewater is fully degraded and can be safely discharged in accordance with strict environmental regulations. Aerobic treatment processes are suitable for a range of industries such as food & beverage, chemical and municipal.

What types of aerobic wastewater treatment system are there?

There are several different technologies for the aerobic treatment of wastewater and sewage. These include:    

  • Conventional activated sludge: organic matter is broken down by aerobic microorganisms in an aeration tank. This forms biological flocs (sludge) which are then separated from the treated water in a sedimentation tank.
  • Moving bed biofilm reactor (MBBR): biofilm grows on plastic carriers suspended and circulated in an aeration tank. These are kept in the tank by retention sieves.
  • Membrane bioreactor (MBR): advanced technology combining the activated sludge process with membrane filtration.

What are the benefits of aerobic wastewater treatment systems?

Aerobic treatment of wastewater is a stable, simple and efficient process that produces high-quality secondary effluent. The resulting sludge is odour-free and can be sold as excellent agricultural fertiliser.

When combined with anaerobic treatment, aerobic treatment systems ensure complete contaminant and nutrient removal. This means your wastewater can be safely discharged without breaching stringent environmental regulations.

How can you get the most out of your aerobic wastewater treatment system?

You can optimise your system through our full range of water tech services. From Hubgrade digital monitoring to maintenance support, our packages help your technology perform better – saving you time, money and hassle.

Want to learn more about aerobic wastewater treatment and how it could benefit your plant? Take a look at our products and case studies below.

Blog- MBBR: A Small Solution with Big Results

Brochure - Hybas Fusion​​​​​​​

A biological wastewater treatment solution combining activated sludge and moving bed biofilm reactor (MBBR) processes for nitrogen removal.

Sidestream nitrogen-removal system for an energy-neutral wastewater treatment plant.

Biological water treatment system for industrial & municipal markets

An advanced, adaptable and automated biofiltration process for the clarification of effluent.

Water Treatment Applications

We design and manage innovative solutions for a wide range of water and wastewater treatment applications.

Sustainable & economical wastewater treatment systems. Technologies for safe, environmentally compliant wastewater treatment systems and sewage treatment plant operations.

Sustainable & economical industrial water recycling systems

Efficient wastewater and sewage treatment plant technologies for UK environmental compliance.


Our teams of industry experts work with you to supply the water technologies and services you need to overcome challenges in your market.

Delivering compliant process and waste to recovery water for pharmaceutical/cosmetic needs.

Solutions to design, build, maintain and upgrade municipal water and wastewater treatment facilities.

Delivering ingredient water and waste to resource services in the food and beverage industry.

Water treatment for the automotive industry to ensure business continuity and operational control.

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