Bigadan - Kalundborg Energy

Known for its biogas production, Kalundborg Energy, a part of Bigadan, procures organic residues from Novo Nordisk and Novonesis to annually produce about 30 million Nm3 of bioenergy.

From 2026 onwards, the plant will capture, purify, and liquefy the CO₂ which would otherwise be emitted as part of their production process. Through their partnership with INEOS Energy, the biogenic CO₂ will then be safely and permanently stored in a depleted oil reservoir below the North Sea through the Greensand Future Project.

Having secured subsidies through the Danish Energy Agency’s Negative Emission Carbon Capture and Storage (NECCS) tender, Bigadan’s approach will support Denmark’s growing carbon capture and storage infrastructure.

We turn green commitments into profitable realities.

Since 1982, Bigadan have been a strategic partner in non-fossil energy, CO₂ reduction, and circular energy systems. We deliver biomethane, biogenic CO₂, gas certificates, and CDR credits as documented solutions for emissions reduction and help our partners move closer to their climate targets. As owners of the entire value chain, from biomass sourcing to energy production, we ensure full transparency, traceability, and measurable climate impact across every solution we deliver.

We are currently building the CO₂ plant in Kalundborg, capturing CO₂ from our biogas plant. From April, we will start transporting liquefied CO₂ to Esbjerg, where it will be stored until it is shipped for permanent storage in the Nini Field. This is only the beginning - for us, continuing this journey is simply the natural next step.
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- Henrik Iversen, CCO, Bigadan

• Works in partnership with the Greensand Future Project to safely store carbon for tens of thousands of years in a depleted soil resevoir below the North Sea.
• Receives government support in the form of subsidies from the Danish Energy Agency’s NECCS fund. However, it relies on the carbon credits to make it economically viable.
• Highly efficient process, using just 0.07 tonnes of CO₂ to permanently remove 1 tonne of CO₂e
• End-to-end digital traceability combined with continuous, multi-layer sensors for subsurface and seabed monitoring with an additional 20 years of post-injection monitoring ensures RED III compliance and reliable, permanent CO₂ storage.
• Uses organic waste sourced from Novo Nordisk, Novonesis, and local agricultural businesses to produce 30 million Nm3 of biogas energy and nutrient rich fertilisers for 10,000 hectares of farm land.
• The CO₂ capture facility includes dual-line backup and access to the Herning plant, ensuring minimum disruption to the capture process.
• Plans to deploy more capture facilities on their remaining biogas plants, aiming to remove 225,000 tCO₂e.