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Wärtsilä to supply two biogas upgrading plants to Nature Energy

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Wärtsilä will supply two large-scale biogas upgrading plants to Nature Energy in Denmark.

The agreement dates back to early 2019, but the project was delayed due to permit applications. Production of the upgrading unit was initiated in the fourth quarter of 2020.

The two plants will be installed in the towns of Kvaers and Kong, with each plant upgrading more than 40 million Nm3 of biogas annually. This will deliver approximately 470 GWh of green gas energy, equivalent to providing fuel for more than 45,000 cars.

Biomethane currently accounts for approximately 20% of Denmark’s gas consumption, and the aim is for the grid to become completely green by 2035.

Arne Jakobsen, general manager of biogas solutions at Wärtsilä, said: “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.”

“The amine scrubber technology is both robust and reliable, providing very low methane slip and cost-effective operating performance,” said Nature Energy’s executive vice-president, Jesper Bundgaard.

“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.”

The plants are expected to begin injecting biomethane into the Danish gas grid in 2022.