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Hydrogen Sulfide Control for Biogas Plants: Balancing Efficiency, Cost and Sustainability

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By Lane Flora

April 10, 2025

Biogas 

Selecting the right hydrogen sulfide control solution is a critical decision for biogas plants to maximize effectiveness, minimize costs and support environmental and regulatory goals.

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Aemetis Inc. on April 8 announced that its production of renewable natural gas (RNG) increased 55% in March compared to February. Aemetis Biogas also completed a sale of LCFS and D3 RINs at the end of Q1.

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Reps. Brian Fitzpatrick, R-Pa., and Linda Sanchez, D-Calif., and Sens. Thom Tillis, R-N.C., and Mark Warner, D-Va., on April 2 reintroduced legislation that aims to create a $1-per-gallon tax credit for RNG sold for use as transportation fuel.

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The RNG Coalition on April 7 debuted a new brand identity, shortening its name (previously “Coalition for Renewable Natural Gas”) and unveiling a vibrant new logo system that highlights its role as the trusted voice for North America's RNG industry.

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WM April 2 announced the company will celebrate the official grand openings for four recycling and renewable natural gas (RNG) projects across the U.S. The RNG projects are located near Chicago and Philadelphia.

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Anaergia Inc., through its subsidiary, Anaergia S.r.l., has signed contracts with entities owned by QGM S.á.r.l. for the building of two new biomethane production plants in Italy. Anaergia S.r.l. will serve as the EPC contractor for both projects.

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Gevo Inc. CEO Patrick Gruber discussed the company’s proposed sustainable aviation fuel (SAF) project in South Dakota during a fourth quarter earnings call, held March 27, indicating financial close could be achieved by year-end.

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Anaergia Inc. announced it has received a formal notice from the City of Fermo, Italy, to proceed with the construction of a waste treatment plant, including a new anaerobic digestion facility that will produce RNG.

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EnviTec Biogas has announced the commissioning of a manure RNG project in South Dakota. The facility has been processing more than 300,000 gallons per day of manure from more than 9,500 dairy cows per day since the beginning of the year.

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The Solid Waste Disposal Authority of Baldwin County, Alabama, on March 20 announced the opening of its new 62,000-square-foot advanced materials recovery facility (MRF) and the commissioning of its renewable natural gas (RNG) plant.

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The 2025 International Biomass Conference & Expo, held March 18-20 in Atlanta Georgia, featured of insightful discussions, cutting-edge technology showcases, and unparalleled networking opportunities.

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European Energy has received its first truckload of biogenic CO₂ from Tønder Biogas. The CO₂ will be used for the company’s Power-to-X facility in Kassø, where it will play a key role in the production of e-methanol.

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EverGen Infrastructure Corp. announces that Fraser Valley Biogas Ltd., a subsidiary of the company, has entered into an agreement to sell the land on which the Fraser Valley Bio Gas Project operations.

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The government of Alberta has introduced legislation that aims to update its Agricultural Operation Practices Act to help grow and diversify agriculture while supporting the province’s emerging biogas industry.

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Sagepoint Energy LLC on March 18 announced it has acquired two RNG assets—Lynx Renewable Energy Kansas and Renewable Power Producers. Both facilities produce pipeline-quality RNG utilizing landfill gas as feedstock.

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Southern California Gas Co. (SoCalGas) today announced it executed a contract with Organic Energy Solutions (OES) to procure renewable natural gas (RNG) converted from organic waste and inject it into SoCalGas’ pipeline system.

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Opal Fuels Inc. on March 13 announced the company produced 3.8 million MMBtu of RNG in 2024, up 41% when compared to 2023. The increase was supported by three new landfill RNG projects that commenced operations during the year.

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Greenlane Renewables announces new service agreements

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By Greenlane Renewables Inc.

March 14, 2025

Greenlane Renewables Inc. on March 13 announced it has secured three new service agreements for RNG project sites under its 3-tiered service offering program. Greenlane previously supplied biogas upgrading systems to the customers.

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Aemetis Inc. released fourth quarter and full year 2024 financial results on March 13, reporting increased revenues for its U.S. ethanol and biogas operations as well as its biodiesel operations in India.

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Patrick Serfass, executive director of the American Biogas Council is praising the decision announced yesterday by the U.S. EPA to reopen its greenhouse gas emissions standards for heavy-duty vehicles.

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TotalEnergies announces the commissioning of BioNorrois, its 8th biomethane production unit in France, located in Fontaine-le-Dun (Normandy). It will inject 153 GWh of biomethane per year into the natural gas transport network.

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OPAL Fuels Inc. on March 5 announced it has entered into five new fuel station services agreements to support customer hauling operations in Canada. OPAL Fuels will design, build, own and operate these new stations.

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The City of Pasco, Burnham RNG, and project partners Biogas Engineering, Cascade Natural Gas, Gross-Wen Technologies, Sustainable Energy Ventures, Swinerton Energy, and Xylem are celebrating the groundbreaking of an RNG expansion project.

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PlanET Biogas USA Inc. celebrated a major milestone at the end of 2024, having successfully delivered over 60 anaerobic digesters to clients in the U.S. in just three years. Together, those tanks make up a total of 32 projects across 10 states.

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Roeslein Renewables has been awarded ISCC PLUS and ISCC EU certifications for biomass feedstocks used in RNG production. This is the first ISCC certification for biomass-based crop residues, including cover crops, processed for clean-burning RNG.

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Anaergia Inc., through its subsidiary, Anaergia Technologies LLC, has entered into agreements to upgrade the renewable energy anaerobic digester (READ) located at The University of California, Davis.

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Virentis Advisors announced on Feb. 25 its clients have recently completed bioenergy ITC transfer transactions totaling over $68 million. The company anticipates 2025 will be another robust year in the bioenergy industry.

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The American Biogas Council on March 3 announced the launch of its Biogas Carbon Accounting Tool (Biogas CAT), a groundbreaking tool to count the full lifecycle emissions of biogas projects that was prepared by EcoEngineers.

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OPAL Fuels Inc. announced on Feb. 27 it has entered into joint venture partnerships to develop four new landfill RNG production projects. OPAL’s 50% share of the four projects represents 1.5 million MMBtu of aggregate annual design capacity.

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Aemetis Inc. has announced the receipt of $6 million of cash, after transaction costs, from the sale of $7.7 million of IRA investment tax credits generated by the construction of dairy biogas digesters by its Aemetis Biogas subsidiary.

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