Oxygen for Biological Desulfurization & H₂S Removal in Biogas
Biological desulfurization removes corrosive hydrogen sulfide (H₂S) from biogas continuously, without the recurring cost of chemical dosing and downstream media like activated carbon. It runs on a steady, controlled supply of oxygen — and ON2 puts that supply on your site, sized to your gas.
Replace a chemical bill, protect the equipment
Controlled oxygen injection lets sulfur-oxidizing bacteria capture H₂S biologically before it corrodes engines, upgraders, and pipelines. The oxygen plant isn't overhead — it replaces recurring chemical dosing and media costs while protecting your downstream equipment. An on-site plant generates that oxygen from ambient air, so there are no chemical deliveries tied to the process either.
Purity and pressure the process calls for
ON2 plants deliver 90–95% oxygen purity — the range typically specified for biological H₂S removal — with delivery pressure adjustable from 0 to 50 psi to match your digester headspace or injection point. Many headspaces are maintained at only a few millibar, so the oxygen line needs delivery in the low-psig range; the same plant also covers higher-pressure process points.
Steady supply for a continuous process
Biological desulfurization runs as long as your digester produces gas, so the oxygen supply has to be dependable. An ON2 plant produces oxygen on site from ambient air and ships with hospital-grade remote monitoring — purity, CO₂, temperature, and contamination alerts — visible from your control room or your phone, so you see the supply is on-spec without a walk to the container.
Built for the field, made in the USA
The plant is engineered for year-round outdoor operation from −50°C to +50°C — proven from sub-arctic Canada to extreme heat in India — and runs quietly at 56 dBA. Every ON2 system is manufactured in the USA in an ISO 13485 facility, designed to NFPA 99, with US-based support, and ON2 has been building oxygen systems since 1984 with 70M+ operating hours in the field.
What's included
- Replaces recurring chemical dosing and media costs
- 90–95% oxygen purity for biological desulfurization
- Delivery pressure adjustable from 0 to 50 psi
- Hospital-grade remote monitoring: purity, CO₂, temperature, alerts
- Outdoor-rated −50°C to +50°C; 56 dBA operation
- Made in the USA, ISO 13485 facility, designed to NFPA 99
Frequently asked questions
Why use oxygen instead of chemicals for H₂S removal?
Controlled oxygen injection drives biological desulfurization, which removes H₂S continuously without the recurring cost of chemical dosing and downstream media like activated carbon. The oxygen plant replaces a chemical bill while protecting engines, upgraders, and pipelines from H₂S corrosion.
What oxygen purity does biological H₂S removal need?
ON2 plants deliver 90–95% oxygen purity, the range typically specified for biological hydrogen sulfide removal in anaerobic digesters. Purity is confirmed against your gas volume and composition during quoting.
How is the oxygen supply monitored?
Every ON2 plant ships with hospital-grade remote monitoring — oxygen purity, CO₂, temperature, and contamination alerts — visible from your control room or your phone, so you can confirm the supply is on-spec without walking to the container.
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.
Put on-site oxygen on your desulfurization process
Send us your gas volume, composition, and injection point and we'll size an oxygen plant with purchase and lease-to-own pricing.