Biogas plants contain a valuable carbon resource that is commonly separated and released as CO₂ during conventional upgrading. Q Power’s biological methanation technology converts this CO₂ together with renewable hydrogen into additional renewable methane.

The solution can be integrated into both new and existing biogas plants through several standardized configurations:

1. Utilization of separated CO₂ from an existing upgrading unit
2. Direct methanation of raw biogas
3. Stand-alone methanation with independent gas polishing
4. Fully integrated methanation and biogas-upgrading systems

This allows operators to increase methane production without increasing biogas feedstock consumption, improve overall carbon utilization and access both biomethane and RFNBO eMethane markets.

Q Power’s proprietary solid-state biological methanation technology provides flexible operation, high methane conversion and efficient integration with variable renewable hydrogen production. Closed-loop gas polishing enables residual methane, hydrogen and CO₂ to be returned to the process instead of being discharged as gaseous reject streams.

Q Power can provide the complete delivery scope, including:

1. Plant integration and process engineering
2. Biological methanation
3. CO₂ and methane treatment
4. Gas polishing, drying and compression
5. Electrolyser and hydrogen-system integration
6. Installation, commissioning and lifecycle support

The technology is based on more than 15 years of Power-to-X development and has been demonstrated across biogas, industrial CO₂, flue gas and other carbon-containing gas streams. Q Power has also delivered an industrial-scale eMethane plant in Finland.