Anaerobic Treatment

The principle of anaerobic treatment is the utilization of anaerobic bacteria (biomass) to convert organic pollutants or COD (Chemical Oxygen Demand) into biogas in an oxygen free environment.

Anaerobic micro-organisms (specific to oxygen-free conditions) are selected for their ability to degrade organic matter present in industrial effluents. More precisely, organic pollutants are converted into biogas (methane + carbon dioxide) and a small amount of biosolids.

The energy-rich biogas can then be used in the plant process (for boiler-feed and in generators) to produce "green" electricity and heat.

A proven, energy-efficient method to treat industrial wastewater

Anaerobic treatment presents several advantages over aerobic alternatives:

  • Low energy use
  • Small reactor surface area
  • Lower chemical usage
  • Reduced sludge handling costs 

It is possible for an anaerobic plant to be energy neutral or even an energy producer.

Veolia's expertise in anaerobic treatment

Through its Biothane line of processes, Veolia offers various anaerobic systems adapted to the characteristics of the wastewater to treat. Each system is especially designed to achieve the highest efficiency possible.

Applied Biothane anaerobic technologies include:

Biothane UASB Plant

Biobulk CSTR Plant

Biothane SEAD® Plant

With its Biothane Biogas Scrubbers, Veolia also provides complementary solutions to clean the produced biogas. By making it safe to work with, it can serve as a source of renewable energy that can be utilized in the production process.