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Updated: Aug 30, 2026

Biogas Purification through the use of a Microalgae-Bacterial System in Semi-Industrial High Rate Algal Ponds
Published on: March 22, 2024
Microbiological removal of hydrogen sulfide from biogas by means of a separate biofilter system: experience with
D Schieder1, P Quicker, R Schneider
1ATZ-EVUS, Kropfersrichter Str. 6-8, D-92237 Sulzbach-Rosenberg, Germany. dschieder@atz-evus.de
Abstract:
The "BIO-Sulfex" biofilter of ATZ-EVUS removes hydrogen sulfide from biogas in a biological way. Hydrogen sulfide causes massive problems during power generation from biogas in a power plant, e.g. corrosion of engines and heat exchangers, and thus causes frequent and therefore expensive engine oil changes. The BIO-Sulfex module is placed between the digester and the power-plant and warrants a cost-effective, reliable and fully biological desulfurization. In the cleaned gas concentrations of less than 100 ppm can be achieved. Power-plant manufacturers usually demand less than 500 or less than 200 ppm. At present, several plants with biogas flow rates between 20 and 350 m3/h are in operation.
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