Reliable On-Site Oxygen Supply for Optimized Biogas Plants Performance
BERG PSA Oxygen Generators provide a reliable and cost-effective on-site oxygen supply for biogas plants. By supporting biological desulfurization and process optimization, oxygen generators significantly improve gas quality, protect equipment, and enhance overall plant efficiency.
Advancements in Biogas Plants and the Essential Role of Oxygen
Biogas plants have evolved substantially in recent years, transitioning from basic anaerobic digestion units to advanced, high‑efficiency renewable energy systems that play a critical role in sustainable energy portfolios. Modern facilities increasingly utilize optimized process control, automation, and integrated gas treatment technologies, including controlled oxygen injection, to enhance methane yield, support biological desulfurization, reduce contaminants such as hydrogen sulfide (H₂S), and improve overall operational stability. Proper oxygen management is essential for maintaining microbial activity, protecting equipment from corrosion, and ensuring consistent biogas quality. In Europe alone, the number of biomethane-producing facilities has grown to approximately 1,678 plants by mid‑2025, reflecting rapid sector expansion across more than 25 countries. Meanwhile, in North America, there are around 2,250 active biogas systems in the United States, including projects producing renewable natural gas and electricity from organic waste feedstocks. These figures demonstrate the significant scale and momentum of biogas deployment, underscoring its increasing contribution to clean energy, efficient operations, and decarbonization goals.
Among the companies advancing this technology, EnviTec Biogas AG (Germany) is a global leader in integrated biogas solutions, offering complete plant construction and gas upgrading.
Why Oxygen Is Essential in Biogas Plants?
Controlled oxygen injection plays a critical role in modern biogas applications, particularly in biological H₂S removal processes. Oxygen supports sulfur-oxidizing bacteria, reduces hydrogen sulfide content, and ensures stable and efficient plant operation.
Maximizing Biogas Yield with Oxygen Generators for Biogas
Biogas is mainly generated from anaerobic digestion, where bacteria decompose organic materials into methane and other related gases. Introducing oxygen into this process might appear a bit unreasonable since AD is generally carried out under no oxygen conditions. However, controlled oxygen injection improves specific phases, including desulphurization, which significantly increases the quality of the resultant gas.
Oxygen helps to decrease the content of hydrogen sulphide (H₂S). Content of hydrogen sulphide (H₂S) conservationists have pointed out that biogas contains another dangerous by-product, hydrogen sulphide (H₂S), which can corrode engines, turbines, and pipelines. Through this concept of utilising the oxygen generators for biogas plants, the H₂S content is conveniently removed, enhancing biogas’ efficacy and quality.
What our Gas Generators do for Biogas Plants?
1. Anaerobic Digestion
Enhanced Microbial Activity: Anaerobic digestion is a biological process where microorganisms break down organic matter in the absence of oxygen, producing biogas. Introducing oxygen into the digestion process using PSA oxygen generators can enhance microbial activity, leading to more efficient degradation of organic materials and increased biogas production.
Optimized Biogas Composition: The controlled addition of oxygen with PSA generators allows for the adjustment of the biogas composition. This optimization can result in a higher methane content in the produced biogas, improving its energy value.
2. Odor Control through Oxygen Generators for Biogas
Biological Odor Treatment: Biogas plants often produce unpleasant odors due to the decomposition of organic materials. PSA oxygen generators can be used to supply oxygen to biological treatment systems that help control and mitigate odors generated during the anaerobic digestion process.
3. Wastewater Treatment
Aeration Tanks: In wastewater treatment processes associated with biogas plants, aeration tanks are used to provide oxygen to microorganisms that facilitate the breakdown of pollutants. PSA oxygen generators contribute to the aeration process, supporting the effective treatment of wastewater.
Nutrient Removal: The controlled addition of oxygen through PSA generators aids in nutrient removal processes, such as denitrification and phosphorus removal, improving the overall efficiency of wastewater treatment in biogas plants.
4. Landfill Gas Utilization
Methane Enhancement: Landfill gas is generated as a byproduct of organic waste decomposition in landfills. PSA oxygen generators can be employed to introduce oxygen into the landfill, enhancing methane production. This, in turn, can improve the feasibility and efficiency of landfill gas utilization projects.
5. Biogas Upgrading
Oxygen Removal: Biogas produced from anaerobic digestion often contains impurities, including oxygen. PSA oxygen generators can be used in the upgrading process to remove oxygen from biogas, resulting in a purified methane-rich gas suitable for injection into natural gas pipelines or use as a clean fuel.
6. Combined Heat and Power (CHP) Systems
Optimized Combustion: In CHP systems that utilize biogas for power generation, PSA oxygen generators can contribute to optimized combustion conditions. This ensures efficient energy conversion and maximizes the electricity and heat output from the biogas.
7. Biological Desulfurization
Sulfur Removal: Biogas produced from certain feedstocks may contain sulfur compounds that need to be removed for environmental and equipment protection reasons. Oxygen addition through PSA generators can enhance biological desulfurization processes, leading to reduced sulfur content in the biogas.
FAQs
1. What is a PSA oxygen gas generator?
PSA oxygen gas generator is a pressure swing adsorption oxygen generation equipment that utilises high-purity air to produce oxygen suitable for various operations like biogas production.
2. Why do biogas plants need oxygen generators?
Adding oxygen decreases the amount of undesirable materials, such as hydrogen sulphide in biogas, which produces better and less corrosive gas meant for equipment maintenance.
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