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First EnviThan biogas upgrading system to Sweden

First EnviThan biogas upgrading system to Sweden
The skid-mounted EnviThan biogas upgrading unit enables short installation times on site (photo courtesy EnviTec Biogas).

Germany’s largest biogas producer EnviTec Biogas AG has announced that its EnviThan biogas upgrading technology has been selected by Swedish biogas plant Vårgårda-Herrljunga Biogas AB for its capacity expansion. The order marks a premiere for EnviThan technology in Sweden.

Vårgårda-Herrljunga Biogas is expanding its biogas plant with another gas upgrading plant, which will meet the prescribed DIN standard for vehicle fuel marking the first delivery of EnviThan biogas upgrading technology in Sweden for EnviTec Biogas.

“Premiär för vår innovativa teknik” means Premiere of our innovative technology! The technology referred to here is the innovative EnviThan gas upgrading system from EnviTec Biogas AG. Already tried and tested a hundred times, this technology can now demonstrate all its advantages in Sweden for the first time. Our market entry in Sweden once again highlights our overall expertise and flexibility in Europe, said Maurice Markerink, Managing Director of EnviTec Plant Construction.

While the rated capacity of the new gas upgrading plant amounts to 402 Nm³ per hour of biomethane (600 Nm³/h of raw biogas, 65 vol. % methane), it is already prepared for a capacity expansion of up to 566 Nm³ per hour of biomethane – aka renewable natural gas (RNG) – (840 Nm³/h of raw biogas, 65 vol. % methane).

Before selecting its second gas upgrading plant, the customer made a thorough comparison of the power consumption, the raw gas upgrading design, and the quality level – and it was our EnviThan technology that finally won them over, said Maurice Markerink.

The scope of delivery includes a completely skid-based raw biogas upgrading system, which enables short installation times on site.

The delivery also includes an efficient two-stage gas cooling system, the EnviTec Remote system, and plant control developed by EnviTec.

RNG as a green fuel

The plant is connected to a local four-kilometer-long 4-bar gas network that is, in turn, connected to a high-pressure station.

Here, the pressure is increased to 250 bar so that the biomethane can then be filled into mobile containers and delivered to a CNG filling station for future use as fuel.

The process developed by Evonik Industries and EnviTec is particularly environmentally friendly because it takes advantage of the different sizes and speeds of passage of gas molecules.

Since carbon dioxide (CO2) molecules are smaller than methane (CH4) molecules, they can migrate through the membrane much faster.

The methane remains on the high-pressure side of the membrane, while the CO2 molecules of the biogas pass through.

The gas upgrading process thus requires neither chemicals nor water or other additives. The RNG produced can now be used wherever natural gas is used – including the transport sector, like in Sweden.

Experienced provider

EnviTec Biogas has had experience as a plant manufacturer in the Scandinavian and Baltic markets for nine years.

Our plants in Denmark are all running stably and four-year-old plants in Estonia continue to attract customers, said Maurice Markerink.

The globally operating medium-sized company from Lohne and Saerbeck Germany recently announced the start of construction of its 100th EnviThan plant, which will help to drive the climate transition on the Danish island of Funen.

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