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Tuesday, January 5, 2021 

Wärtsilä is to supply two large-scale biogas upgrading plants to be sited at Kvaers and Kong in Denmark, under a contract placed by biomethame company Nature Energy.

Biogas is produced primarily from waste products, such as manure and food waste. When upgraded to biomethane, it can be utilised in the same way as natural gas as transport fuel, for heating and to power industrial processes. It is a renewable energy solution since the remaining digestate can be sold as bio-fertiliser. Currently biomethane accounts for about 20% of Denmark’s gas consumption, and the aim is for the grid to become totally green by 2035. By injecting biomethane - the end product of upgraded biogas - to the gas grid, Denmark will be taking an important step towards its stated ambition of becoming a climate neutral and fossil-free nation. The agreement with Wärtsilä dates back to early 2019, but the project was delayed because of permit applications. Production of the upgrading unit has been initiated in the fourth quarter of 2020, when also the orders were included in Wärtsilä’s order book.

Arne Jakobsen, GM Biogas Solutions, Wärtsilä Gas Solutions, said: “Wärtsilä Biogas Solutions is a market leader offering innovative systems and lifecycle solutions to the gas value chain. Our biogas upgrading plants are based on Wärtsilä’s Puregas CA technology, an amine scrubber process featuring the lowest operating costs. We have enjoyed a long and constructive relationship with Nature Energy, and are proud to have again been chosen for these latest projects.”

EVP Nature Energy Jesper Bundgaard said: “The amine scrubber technology is both robust and reliable, providing very low methane slip and cost-effective operating performance. We have worked often with Wärtsilä and are confident, therefore, that the plants will be completed on time and will operate with the usual efficiency.”

Each of the two plants will upgrade more than 40 million Nm3 of biogas each year.  It is expected that the plants will begin injecting biomethane in 2022.

Wärtsilä Gas Solutions' main focus areas are handling of gas in seaborne transport (storage, fuel, transfer and BOG management), gas to power, liquefaction and biogas solutions.

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