Glansager site, Denmark:
Powering biological methanation
In 2023, Andel and global biogas producer Shell Low Carbon Solutions inaugurated the world’s first plant to commercially boost biogas production through electrolysis and biological methanation. The project features three 3.1 MW HydroGen Electrolysers from Stiesdal that provide hydrogen for upgrading the biogas.
Three 3.1 MW HydroGen Electrolysers boost Shell Low Carbon Solutions’ PtX output by injecting green hydrogen into a proven biological methanation loop. The last Stiesdal HydroGen Electrolyser was delivered in 2024 and now transforms low-cost power and captured CO₂ into pipeline-grade gas.
Under normal conditions, biogas contains around 40% CO₂, which is separated out and released to atmosphere. By adding hydrogen, this CO₂ can instead be transformed into methane, enabling the biogas plant to produce substantially more renewable gas.
Commercial highlights
Proven at full design capacity
Three Stiesdal units were installed. The final unit was added in autumn 2024, with EPC/upgrade completion confirmed in April 2025. Full operation materially strengthens the bankability of the site.
Immediate value uplift of existing biogas
Adding green H₂ lifts methane content via biological methanation, boosting output At full ramp-up, Shell Low Carbon Solutions cites an output increase of approximately 12,000 m³ per day. This provides a direct increase in commercial gas output.
Industrialised, modular hardware
Stiesdal HydroGen units are delivered on two trucks. They install rapidly outdoors and provide genuine start-stop operation, allowing operators to follow low spot-price windows. No buildings are required, civil works are minimal, time to first hydrogen is short, and O&M is simpler.
See the Glansager site
Developed by Andel and Shell Low Carbon Solutions, with EPC by BWSC, power and control systems by KK Group, pressure vessel from Welcon, and electrode stack from Danfoss, all established Danish industrial suppliers.
Inputs: Biogenic CO₂ + low-cost power windows → H₂ via HydroGen → biological methanation.
Outputs: More grid-spec biomethane (pipeline), optional O₂ and heat valorisation. Grid-service capable due to fast ramping.
Each electrolyser is a self-contained unit, built from components supplied by leading European Tier-1 partners, and delivered on two standard trucks, ready for rapid delivery. Minimal Balance of Plant means lower CAPEX.
“A piece of world history has been written in Denmark. As the first place in the world, you can now produce e-methane biogas for commercial use. This is the kind of innovative thinking that will help drive the green transition forward.”
Morten Bødskov, Minister for Industry, Business and Financial Affairs
Send me your questions
Contact Esben Baltzer Nielsen, Head of Sales and Business Development, if you have unanswered questions or want to discuss your hydrogen project.