Doranova as the technology supplier and EPC contractor for the biogas plant built alongside Pohjolan Peruna Oy’s potato processing factory.
The biogas plant serves industrial-scale food production and is part of an advanced energy infrastructure aimed at fossil-free operations and circular energy use. It efficiently and environmentally responsibly utilizes potato-processing side streams.
Project details
Commissioning year: 2024
Feedstocks: Side streams and waste from the potato factory; specifically designed for demanding industrial feedstocks
Capacity: Approx. 20,000 t per year
Gas production: Biogas is used primarily for producing process steam for the factory; in addition, electricity and heat are generated
Technology and implementation
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The plant is based on wet digestion with one large 2,500 m³ Wetferm reactor, delivered in cooperation with Sauter Biogas GmbH (Germany).
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Post-digestion is carried out in a 3,000 m³ secondary digester.
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The plant has the largest raw biogas storage volume in Finland.
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The gas is used for steam production in Pohjolan Peruna’s process and for the plant’s own heat demand.
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The facility also includes a 160 kWe CHP unit that generates electricity and heat for the biogas plant, and electricity for the potato factory when steam is not required.
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Doranova’s delivery included the process technology and thermal systems.
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The project was carried out during 2024–2025.
Impact and benefits
Energy self-sufficiency: The plant improves the factory’s energy efficiency and reduces dependence on fossil fuels.
Nutrient recycling: The produced digestate is used as fertilizer in local agriculture, replacing industrial nutrient products.
