Oxygen Injection vs. Chemical Dosing & Scavenger Media for Biogas H₂S Removal
Most biogas plants remove hydrogen sulfide (H₂S) one of two ways: a chemical program — dosing or scavenger media that must be purchased, delivered, changed out, and disposed of — or biological desulfurization driven by controlled oxygen injection. The biological route replaces the recurring consumable spend with a one-time oxygen plant, and ON2 supplies that plant on site, containerized and plug-and-play.
Consumables vs. a one-time asset
A chemical H₂S program is a permanent operating expense: media and chemicals are bought, trucked in, changed out, and disposed of for the life of the plant. Biological desulfurization needs only a steady supply of oxygen — and when that oxygen is generated on site from ambient air, the recurring purchases stop. ON2 plants run on demand, arrive as a complete containerized system, and can be bought outright or leased-to-own over 5 or 7 years, so the switch can be structured as a monthly payment that replaces the chemical budget.
Specifications that match biogas requirements
ON2 containerized oxygen plants deliver 90–95% oxygen purity — the range typically specified for biological desulfurization — with delivery pressure adjustable from 0 to 50 psi to match your digester headspace or injection point. The insulated, climate-controlled container is engineered for year-round outdoor operation from −50°C to +50°C, proven in deployments from Yellowknife, Canada to New Delhi, India.
Patented vacuum-cycle technology
Every 100 seconds, a vacuum sweep purges heat, humidity, and contaminants out of the system — no external air dryers and no sieve degradation. The plant runs on demand: it produces oxygen when your process needs it and goes to standby when it doesn't, unlike conventional PSA generators that typically run continuously whether oxygen is needed or not. The technology is patented, with additional patents pending.
Buy it or lease-to-own
ON2 offers direct purchase or lease-to-own over 5 or 7 years, so the oxygen plant can be matched to your project's capital plan instead of the other way around. Either way you deal with a single manufacturer — we understand your project, design the system, then build, ship, and commission it. ON2 has been building oxygen systems since 1984, with every system manufactured in the USA.
What's included
- 90–95% oxygen purity for biological desulfurization
- Delivery pressure adjustable from 0 to 50 psi
- Proven outdoor operation from −50°C to +50°C
- Plug-and-play containerized plant — no building required
- Runs on demand; standby when oxygen isn't needed
- Direct purchase or lease-to-own over 5 or 7 years
Frequently asked questions
How does oxygen injection compare to chemical dosing for H₂S removal?
Chemical dosing and scavenger media are recurring consumables — purchased, delivered, changed out, and disposed of continuously. Oxygen injection drives biological desulfurization inside the digester, so once the oxygen plant is on site there are no consumables to buy. ON2 plants generate that oxygen on demand from ambient air.
What oxygen purity do ON2 plants deliver for biogas desulfurization?
ON2 containerized oxygen plants deliver 90–95% oxygen purity, the range typically specified for biological hydrogen sulfide removal in anaerobic digesters. Purity and flow are confirmed against your gas volume and composition during quoting.
Can the plant sit outdoors year-round?
Yes. The insulated, climate-controlled container is engineered for year-round outdoor operation from −50°C to +50°C, proven in deployments from northern Canada to India. It arrives as a complete plug-and-play plant — no building required.
Can we lease the oxygen plant instead of buying it?
Yes. ON2 offers lease-to-own over 5 or 7 years alongside direct purchase, so you can spread the cost into predictable payments and keep capital available for the rest of the project.
Run the numbers against your chemical budget
Tell us what you spend on H₂S chemicals or media today and we'll put an on-site oxygen plant quote next to it — purchase or lease-to-own.