Biological Treatment

Aerofloat has a thorough understanding of notoriously complex biological wastewater treatments, offering a range of biological wastewater treatment options for industrial and municipal applications.

This commonly includes reducing and removing soluble contaminants, such as BOD (biochemical oxygen demand) and COD (chemical oxygen demand) and removing soluble organics from high strength wastewaters.

Aerofloat has extensive in-house process engineering skills and access to a range of technologies to tackle a variety of wastewater problems. Aerofloat’s patented aeration lance technology provides a unique low maintenance solution for standard biological treatment plant technology, including AeroMBBR (moving bed biofilm reactor – MBBR), AeroSBR (sequencing batch reactor), AeroASR (activated sludge reactor) and AeroMBR (membrane bioreactor).

Biological wastewater treatment is typically needed to remove soluble organics in wastewater – for example, dissolved sugars. The biological process needed will be determined by the wastewater influent profile (looking at flowrate and concentration) and the discharge requirements and applications of the treated wastewater.

In some instances, biological treatment processes will be coupled with physical/chemical treatment processes (such as dissolved air flotation) to remove the undissolved contaminant before or after the biological treatment phase.

Aerofloat has extensive experience in designing a fit-for-purpose treatment plant that carefully considers the best economical solution while still achieving the required effluent results.

Experts in biological wastewater treatment

Biological wastewater treatment requires in-depth knowledge of chemical engineering and process.

In-depth understanding of wastewater chemistry

Aerofloat prides itself on having a deep understanding of chemical engineering and the chemical processes required to ensure an effective wastewater treatment plant.

Patented biological wastewater treatment

Aerofloat utilises a range of patented and off-the-shelf wastewater treatment technology. Its patented technologies ensure low-maintenance solutions for its clients.

Relevant products

When designing a wastewater treatment plant, Aerofloat engineers utilise a range of different proprietary and off-the-shelf products to deliver the best wastewater treatment solution. The following are some, but not limited to, Aerofloat’s available product portfolio.


Moving bed biofilm reactor (MBBR) involves a biological process commonly used to remove soluble contaminants, such as BOD and COD (typically dissolved sugars and proteins).


AeroSBR (sequence batch reactor) technology is a suspended growth biological treatment process whereby the microorganisms are settled, and effluent decanted, within the same reactor.


The AeroASR (activated sludge reactor) is an aerobic, suspended growth biological treatment process and the mixed liquor containing the microorganisms which flows from the ASR are settled in a separate clarifier.

Membrane Bio Reactor

Aerofloat has many combined years’ engineering experience in the wastewater treatment industry. It also has access to several third-party products at competitive prices to incorporate into any design – including membrane bio reactors for biological treatment.

Serviceable markets:

  • Plastics recycling

  • Printing and packaging

  • Pulp and paper

  • Construction

  • Pharmaceuticals

  • Personal care

  • Holiday parks

  • Remote towns

  • Housing developments

  • Water reuse

After Care

Aerofloat can help you maintain optimal performance of your wastewater treatment system long after installation.
Ensure a cost-effective and hassle-free chemical supply.
Minimise downtime with regular servicing and maintenance
Easy access to the right parts to keep your treatment system running
Utilise existing infrastructure with a WWT system upgrade.

Biological treatment case studies

Frequently Asked Questions

Biological wastewater treatment is a process that uses microorganisms to reduce and remove soluble contaminants (such as BOD – Biochemical oxygen demand and COD – Chemical Oxygen Demand) and remove soluble organics (such as dissolved sugars) from the wastewater.

It is often used in combination with physical and chemical treatment methods for comprehensive wastewater purification. The choice of treatment method depends on the specific characteristics of the wastewater and the desired treatment outcomes.

Biological wastewater solutions can be highly complex and require a thorough understanding of chemical engineering and biological wastewater treatment to be effective. Aerofloat has over 50 years experience working on biological wastewater treatment solutions.

Biological wastewater treatment is commonly applied in various industries and municipal environments. Its versatile applications include industries such as plastics recycling, printing and packaging, pulp and paper, construction, pharmaceuticals, personal care, as well as in holiday parks, remote towns, and housing developments.

The duration of the biological treatment process can vary based on factors like the type of wastewater and specific treatment methods employed. The time required for effective biological wastewater treatment depends on the influent profile (flowrate and concentration of contaminants) and the discharge requirements of the treated wastewater. It’s essential to tailor the treatment process to meet the unique needs of each scenario.

How can we help?

Whatever your wastewater challenge, we can develop a solution for you. Start by getting in touch with one of our experts.