Gas Treatment
Desulfurization
Removing hydrogen sulfide (H₂S) from biogas in biological towers.
Desulfurization tower
Protecting equipment from H₂S
One method used to prevent damage from hydrogen sulfide (H₂S) in biogas to the process and its equipment is chemical washing of the biogas.
Unlike chemical systems, in biological desulfurization the biogas never contacts any chemical: hydrogen sulfide is removed by a special bacterial species that grows in the tower and clings to the packing surfaces.
Chemical washing
Biogas is scrubbed with a chemical solution.
Biological tower
H₂S removed by bacteria, with no chemical contact.
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