Technological Leap in Linköping – Biogas CO₂ Upgraded for Food Use
biogas production to food-grade quality. Using a so-called CCU (Carbon Capture and Utilization) facility, the biogenic CO₂ is further purified using carbon filters and drying, then cooled into liquid form and thoroughly analyzed. The result is a new product – food-grade liquid carbon dioxide – with a production capacity of 20,000 tons per year.
The project marks both a technological advancement and an opportunity to make use of a previously untapped resource. The purified CO₂ replaces fossil-based carbon dioxide and can be used in industries such as food and beverages, strengthening Tekniska verken’s role in the transition to a more resource-efficient and climate-smart society.
The main supplier of the process equipment is Bright Renewables, which has built similar facilities in the Netherlands and Germany. However, the Linköping facility will be the largest they’ve constructed to date. Four storage tanks with a total capacity of 280 tons have already been installed.
The total investment amounts to SEK 54 million, with SEK 22 million funded by the Swedish climate investment program Klimatklivet. At the same time, a major expansion of the existing biogas facility is underway, which will double production. A large share will be processed into liquefied biogas (LBG), a fuel increasingly in demand for heavy transport and industry.
Engineering firm FVB has played a key role in integrating media flows and process equipment between the new and existing systems. They’ve also been responsible for process and instrumentation diagrams, as well as 3D modeling of the entire facility. The use of 3D modeling has allowed for quick adjustments to piping and flow designs in the operating plant—critical for avoiding disruptions.
“The 3D models have been incredibly helpful for coordination and communication between all parties involved,” says Andreas Björk, Project Manager at Tekniska verken.
Click here to read more about “CO₂ in a New Form – A Technological Leap in Linköping” (in Swedish)!
Photo: Tekniska verken, Joakim Sjöholm