Sizing an On-Site Oxygen Plant for Biogas Desulfurization
Specifying an oxygen plant for biological desulfurization comes down to a handful of numbers: your biogas flow, your H₂S concentration, the pressure at your injection point, and the conditions at your site. This page walks through what ON2 needs to size a system — and what the plant delivers against each requirement.
Start with the gas: flow and H₂S concentration
Oxygen demand for biological desulfurization is driven by how much biogas you produce and how much H₂S it carries — and both vary with feedstock, loading, and season. That's why ON2 sizes from your actual gas data rather than a generic table: send us your biogas flow range and H₂S levels, and we specify a plant with the capacity to follow your process. Because ON2 plants run on demand and stand by when oxygen isn't needed, a plant sized for your peak doesn't waste energy at your baseline.
Purity: 90–95% for biological desulfurization
ON2 containerized plants deliver 90–95% oxygen purity, the range typically specified for biological H₂S removal in digester headspaces. Purity is confirmed against your process requirements during quoting.
Pressure: match the injection point, 0–50 psi
Many digester headspaces are maintained at only a few millibar, so the oxygen line needs delivery in the low-psig range — while other injection points sit higher. ON2 plants adjust delivery pressure from 0 to 50 psi on the same unit, so one plant covers low-pressure headspace injection through higher-pressure process points.
Site conditions: outdoor, year-round, remote
The insulated, climate-controlled container is engineered for year-round outdoor operation from −50°C to +50°C — proven from Yellowknife, Canada to New Delhi, India — and is designed for unattended operation at remote sites. No building or mechanical room is required; the plant arrives plug-and-play and ON2 commissions it on site.
From your data to a sized quote
Send ON2 your biogas flow, H₂S concentration, injection-point pressure, and site location. We review the data, specify plant capacity, purity, and delivery pressure, and return a budgetary quote with both direct-purchase and lease-to-own (5 or 7 year) pricing. Detailed engineering specifications and drawings follow as part of the quoting process. ON2 has designed and built on-site oxygen systems since 1984, in Canada and the US.
What's included
- Sized from your gas data: biogas flow, H₂S level, injection pressure
- 90–95% oxygen purity for biological desulfurization
- Delivery pressure adjustable from 0 to 50 psi on one unit
- Outdoor-rated −50°C to +50°C; unattended remote operation
- On-demand operation — plant follows your gas production
- Budgetary quote includes purchase and lease-to-own pricing
Frequently asked questions
What information does ON2 need to size an oxygen plant for a biogas site?
Your biogas flow range, H₂S concentration, the pressure at your injection point, and the site location and conditions. From that, ON2 specifies plant capacity, purity, and delivery pressure and returns a budgetary quote.
Can I get detailed specifications and drawings for our engineering review?
Yes. Detailed engineering specifications are provided as part of the quoting process, sized to your project. Contact ON2 with your gas data to start.
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.
Send us your gas data — get a sized quote back
Biogas flow, H₂S level, injection pressure, site location. We'll specify the plant and return budgetary pricing for purchase and lease-to-own.