Skip navigation

Microbial desulphurization

Low operations costs ath high degree of purification.

AAT microbial desulphurization is used to reduce hydrogen sulphide in biogas, WWTP and landfill plants on an ecological basis.

Apart from methane and carbon dioxide, toxic hydrogen sulphide is produced in fermentation process as well. This acts corrosively on the consumers and equipment.

The hydrogen sulphide containing biogas is passed through a packing tank. Microorganisms settle on the surface of the packing, which by the use of oxygen oxidise the hydrogen sulphide to elementary sulphur and sulphate.

By adding artificial fertiliser as nutritional component for the organisms and circulating water the sulphur and the sulphate is continuously washed out. The sulphate suspension developing is passed to the inlet of the sewage treatment plant or to the fermentation residue tank in case of biogas plants.


  • Material: plastic (PP)
  • Acid-resistand circulation pump
  • Air blower (including non-return valve and deflagation arrester)
  • Water inlet
  • Reciever thank for nutrient solution
  • Flushing lance in tank
  • Heat exchanger
  • Control cabinet
  • Max. hydrogen sulphide feed 20.000 ppm
  • hydrogen sulphide reduction down to 50 ppm


  • By means of a downstream activated carbon filter, the hydrogen sulphide can be eliminated by >99%.