On-Site Oxygen for Wastewater Treatment Plant Digesters
Wastewater treatment plants that digest sludge produce biogas with hydrogen sulfide that corrodes engines and boilers used for cogeneration. Controlled oxygen injection removes that H₂S biologically — no chemical dosing program, no consumable purchases — and ON2 supplies the oxygen as a complete on-site containerized plant.
Fits inside a municipal budget cycle
ON2 offers direct purchase or lease-to-own over 5 or 7 years, so a municipal utility can match the oxygen plant to its capital plan. The plant arrives as a plug-and-play container, operates outdoors from −50°C to +50°C, and connects to your existing digester gas infrastructure without a building.
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
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 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 treatment plant
Tell us your digester gas volume and injection point and we'll size an oxygen plant with purchase and lease-to-own pricing.