On-Site Oxygen for Dairy Manure Digesters & Farm RNG Projects
Manure-based feedstocks are among the highest-sulfur inputs in biogas production, which makes hydrogen sulfide (H₂S) control central to any dairy or livestock RNG project. Controlled oxygen injection lets sulfur-oxidizing bacteria remove that H₂S biologically — and ON2 puts the oxygen supply on your farm as a complete containerized plant.
Built for farm sites, not chemical plants
Dairy and manure digesters are usually far from industrial gas logistics — chemical deliveries and liquid oxygen contracts are expensive to run down a farm road. An on-site containerized oxygen plant removes that logistics chain entirely: it arrives plug-and-play, sits outdoors year-round, and produces oxygen on demand from ambient air. There is no stored oxygen inventory, which matters on combustible-gas sites.
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
Why is H₂S control especially important for manure digesters?
Manure feedstocks are typically high in sulfur, so the raw biogas carries elevated hydrogen sulfide that corrodes engines, boilers, and upgrading equipment. Biological desulfurization with controlled oxygen injection removes that H₂S continuously, without chemical purchases or dosing programs.
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.
Get a budgetary quote for your dairy or manure RNG site
Tell us your gas volume and feedstock and we'll size an oxygen plant with purchase and lease-to-own pricing.