DMT has developed a process for biological desulfurization at low pH for the treatment of biogas. This process (BioSulfurex®) is pH, temperature, nutrient and oxygen controlled. During an intensive research period the elimination capacity (EC) and removal efficiencies (RE) at different process conditions were determined. The effect of variations in H2S loading, cleaning procedures and operational stops are demonstrated with field data. The next step in the development of biological desulphurisation of biogas is the introduction of the DMT-HS packing, introducing EC’s of 500 gH2S/m3/h or more. This system is self-cleaning, produces mainly solid elemental Sulphur, has no chemical need and no or minimum supply water requirement.
The MBR for biological desulfurization of biogas the BioReactor with the DMT BioSulfurex HCP process