Bright Renewables to Supply CO2 Liquefaction Technology at Tekniska Verken's Biogas Plant in Sweden

May 14, 2024
Bright's solution will contribute to creating a circular economy while also reducing Tekniska verken's methane emissions through a recycling process

Bright Renewables has secured the technical tender of Tekniska verken, a Swedish multi-utility energy company, for the supply of CO2 liquefaction technology. The system will be installed at Tekniska verken's biogas plant Svensk Biogas in Linkoping, to purify and liquefy CO2 from the biogas production process to produce food-grade bioCO2. 

The facility will produce 20,000 tons of food-grade quality bioCO2 annually and is expected to be completed before Summer 2025.

“Incorporating a CO2 liquefier into clean energy systems optimizes carbon intensity scores and boosts efficiency,” said Niraj Kunkulol, representative for the Scandinavian market at Bright Renewables. “Using CO2 as a natural refrigerant in our system, an environmentally friendlier alternative to Freon and ammonia, enhances sustainability, while in biogas applications, it maximizes methane use and minimizes methane slip.”

The CO2 liquefaction system, with a capacity of 2,500 kg/hr of bioCO2, comprises a technology to recover CO2 from the biogas upgrading process to purify and liquefy CO2 using natural refrigerant CO2 (R744). The system incorporates four 70 m3 storage tanks for the liquid bioCO2 and a liquid CO2 analyzer to certify food-grade quality. 

The setup not only complements existing clean technology plants but also helps reduce the Carbon Intensity score, improving the plant’s sustainability profile.  

“With Bright’s innovative solution at the facility, we contribute to a circular economy while also reducing our methane emissions by recycling the methane that previously accompanied the carbon dioxide back into the process,” said Anna Lovsen, Business Area Manager Biogas at the Tekniska verken Group. “The goal is to certify the new facility according to ISO 22000/FSSC 22000, which is a requirement for food-grade quality carbon dioxide.”

The new facility is partially financed by Klimatklivet, which focuses on local investments for maximum climate benefit. The support is administered by the Swedish Environmental Protection Agency in collaboration with other central authorities and county administrative boards. 

Tekniska verken is studying prospects for capturing, storing, or using carbon dioxide from activities other than biogas production.