Anaerobic and Energy Recovery Technologies

Anaerobic and Energy Recovery Technologies

  • High Rate Anaerobic Systems
  • Municipal Biosolids Technologies
  • Waste to Energy Plants


Anaerobic Technologies

Aquatec Maxcon is a leading provider of anaerobic technologies for a variety of applications, with over 40 years’ experience in the field. From high rate anaerobic treatment processes for industrial wastewater treatment applications to more conventional municipal digestion processes, Aquatec Maxcon have access to a wide variety of proprietary and in-house technologies. We conduct extensive research and development in our laboratory as well as field pilot trials to continually improve our technologies.

Aquatec Maxcon have also built dedicated Waste to Energy facilities which provide municipalities with reduced biosolid disposal costs in addition to additional revenue streams by co-digesting wastes, thereby reducing greenhouse gases by preventing organic waste going to landfill.

Anaerobic technogies are of interest in the following applications:

  • Processing of organic waste in either slurry or solid form
  • Treatment of high strength wastewater
  • Reducing transport and disposal volumes of biosolids produced by wastewater treatment plants
  • Offsetting site demands for heat and/or power
  • Additional revenue streams via co-digestion where capacity exists in anaerobic digesters
 Smiths  Visy  YVW 1
Smiths Snackfoods WRP Visy WWTP Yarra Valley WTE

Anaerobic Processes

Aquatec Maxcon is a long term partner of Paques BV from the Netherlands, having installed several IC, UASB and Circox reactors over our 30 year partnership.

IC Reactor

 IC Graph Small

Paques Internal Circulator technology enables greater volumetric loading rates and improved process stability than a conventional UASB, enabling the minimum possible footprint. These plants have low energy requirements and deliver substantial volumes of renewable biogas for plant boilers or co-generation facilities. IC Reactors are currently operational at the XXXX Brewery (Brisbane, QLD), Visy Paper (Sydney, NSW), Tooheys Brewery (Sydney, NSW), the Smiths Snackfood Company (Brisbane, QLD) and in Samoa and New Zealand.

Advantages of BIOPAC®IC

  • Very efficient COD removal
  • High reliability: self regulating through the internal circulation mechanism
  • Excellent ability to handle variable influent loads
  • Compact, extremely low footprint with no odour emissions

Anaerobic Floatation Reactor (AFR)


Wastewater with fats, oil and grease and/or solids such as proteins and starch, can effectively be treated in the BIOPAQ®AFR. This AFR is an all-in-one system that converts organic compounds into valuable biogas. The compactly designed bioreactor treats wastewater with a COD content from 5-70 g/l with vegetable or animal fats at hydraulically short retention times from 1-8 days. The intensive contact between the open bacteria flocs and the organic compounds in combination with the biomass retention in the integrated flotation unit is the success factor for this technology.

Advantages of BIOPAQ®AFR

  • Very efficient COD removal, through intensely mixed biomass at bottom of reactor
  • Produces valuable biogas
  • Combines the best characteristics of the compact high rate anaerobic reactors and the CSTR
  • Is a compact reactor: short hydraulic retention time and long biomass retention
  • Requires no acidification or solids separation up front
  • Has no odour emission because of its closed design

Municipal Biosolids


Aquatec Maxcon offers a complete package for anaerobic digestion systems. For anaerobic digesters, we can offer steel or membrane digester covers, digester heating, circulating and mixing systems as well as biogas CHP generators and emergency biogas flares. Aquatec Maxcon supplies and installs individual process units or complete turnkey solutions.

  • Gas Lance - We can offer mixing gas lance in guide tubes in stainless steel and galvanised mild steel.
  • Draft Tube - We can offer draft tube mixing systems using gas lift system.
  • Mechanical Mixing – We offer mechanical mixing either pumped with directional nozzles or long arm agitators
 Himoinsa Engine
Himoinsa Gas Engine

Digester Covers (Floating, Fixed and Double Membrane)

Aquatec Maxcon has completed in excess of 40 digester installations and has designed, manufactured and installed some of the largest digester roofs across Australia.

  • Floating steel digester cover complete with roller guides and water seal.
  • Fixed digester cover for primary.
  • Double Membrane digester covers for lower cost applications.

Waste to Energy

Waste to Energy is Aquatec Maxcon’s answer to a more sustainable sewage treatment plant, which produces renewable energy from a variety of different waste sources. This unique design solution can be used to power existing sewage treatment plants and/or recycled water facilities, with excess energy exported to the grid. The facilities are designed to provide more sustainable energy from the existing sewage treatment plants and remove waste that would otherwise end up in landfill.

The waste to energy plants use biomass derived from a number of sources, which may include fats, oil & grease, fruit & vegetable wastes and wastes from animal processing facilities (such as the sludge from waste treatment plant at abattoirs). The biogas can be used directly for producing heat or combined heat and power (CHP). The process is incredibly energy efficient as out of 100 per cent of the energy content put into the plant, only 12 per cent is required to run the plant and only 10 per cent is lost from the CHP process.

This leaves an excess of 78 per cent of the energy to be utilised in the form of power and heat or excess electricity to the grid.

Advantages of Waste to Energy

  • Additional income via gate fees for waste receival
  • Energy neutral wastewater treatment plant if co-located on site
  • Potential for off-grid wastewater treatment plant
  • Environmentally sustainable solution for waste
  • Powers existing sewage treatment plants and/or recycled
  • water facilities with biomass
  • Excess energy exported to the grid
Yarra Valley Water WTE

Key Installations


Coombabah STP

Tooheys WWTP
 IC Pilot Plant Small
IC Pilot Plant
 pilot plant
AFR Pilot Plant


Products & Services

Aquatec Maxcon has over 46 years’ experience in treating water and wastewater for both municipal and industrial applications.

A leader of the water industry, Aquatec Maxcon has introduced a range of innovative process technologies to Australia including the first UASB, IC Reactor, Membrane Bioreactor and Circox Reactor. We have a successful track record in introducing new technologies and have diligently supported their implementation within Australian conditions.

Aquatec Maxcon Pty Ltd is part of the Aquatec Maxcon Group which provides a vertically integrated range of in-house services including:

  • Design and Construction;
  • Project Management, Commissioning and Operation;
  • Installation and Maintenance;
  • Steel Fabrication, Sand Blasting and Painting;
  • Machine and Plant Automation;
  • System Integration and SCADA Configuration.

Aquatec Maxcon has established and maintains a dedicated service department for scheduled maintainence and breakdown services.

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