H₂S Removal for RNG Pipeline Injection — On-Site Oxygen Plants
RNG revenue depends on gas that meets the pipeline's quality specification — and hydrogen sulfide (H₂S) is one of the contaminants every utility interconnect limits. Removing H₂S upstream also protects the upgrading equipment that turns your biogas into pipeline-quality Renewable Natural Gas. Biological desulfurization with controlled oxygen injection does this continuously, and ON2 supplies that oxygen as an on-site containerized plant.
Protect the equipment that earns your gas revenue
For producers monetizing RNG through environmental credit programs such as RINs and LCFS credits, downtime is lost production. H₂S corrodes the compressors, membranes, and upgrading equipment that sit between the digester and the pipeline meter. Continuous biological desulfurization — sulfur-oxidizing bacteria fed by controlled oxygen injection in the digester headspace — removes H₂S before it reaches that downstream equipment, with no chemical dosing program and no consumable media to purchase, store, and dispose of.
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 does H₂S removal matter for pipeline injection?
Utility interconnects impose gas-quality specifications that limit contaminants, including hydrogen sulfide. Removing H₂S upstream with biological desulfurization keeps the gas within specification and protects the compression and upgrading equipment between the digester and the pipeline meter.
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 delivery pressure be adjusted to our injection point?
Yes. Delivery pressure is adjustable from 0 to 50 psi, which covers typical digester headspace injection requirements — including low-pressure headspaces maintained at only a few millibar where outlet pressure requirements sit in the low-psig range.
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.
Keep your gas in spec and your plant running
Tell us your gas volume and injection point and we'll size an on-site oxygen plant with purchase and lease-to-own pricing.