Energy recovery from biogas is becoming more common, but the processes are hampered by the presence of hydrogen sulfide (H2S). Biogas is a mixture of methane and carbon dioxide (CO2) and is often contaminated with toxic quantities of H2S. H2S is a health, safety, and environmental hazard, and when combined with CO2 and water vapor, it can corrode boilers, piping, and other equipment. Reducing H2S in biogas reduces sulfur dioxide emissions, equipment corrosion, and fouling. H2S reduction also offers cost savings through lower maintenance requirements, and results in greater energy recovery for increased power generation. Eco-Tec’s BgPur™ uses a biogas scrubbing process for the removal of H2S and particulate matter from biogas as it is produced. Using a patented, high efficiency gas-liquid contacting process, H2S is absorbed and the gas is purified for use in power generation facilities, cogeneration facilities, boiler units, natural gas pipeline blending and other heating applications.


  • Small footprint and low installed cost.
  • Consistent performance with >99% H2S removal.
  • Continuous reliable operation with no packed columns.
  • No waste and only environmentally acceptable solid sulfur cake.