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.