Gas1 Referenssejä

Säkylä Biogas Project

The biogas project developed by Gas1 Oy in Säkylä is progressing towards a final investment decision with financing from Auris Kaasuenergia.

The final investment decision will be made once the investment grant decision has been confirmed. In the meantime, the project will be further developed in cooperation with Auris Kaasuenergia. The total investment is approximately €80 million. Construction of the planned biogas plant is scheduled to begin in 2027.

The planned biogas plant will utilise approximately 230,000 tonnes of bio-waste from local industry and agricultural by-products annually. These will be converted into 130 GWh of upgraded biogas, replacing fossil energy in regional industry and transport. The recycled fertilisers generated as by-products will be returned to local agriculture, reducing the need for mineral fertilisers.

The plant will create an industrial circular economy cluster in the area. The nearby factories of Apetit Oy and Sukros Oy will supply their by-products as raw materials for the plant.

Another key partner is Biolan, which will supply a significant quantity of poultry manure to the plant and receive hygienised reject material in return.

The project will provide concrete economic and operational benefits to Satakunta and Finland as a whole.

Investment: €80 million
Energy: 130 GWh/year
Raw materials: 230,000 tonnes of bio-waste
Circular economy: Reducing the use of fossil fuels and mineral fertilisers
Employment impact: Dozens of new jobs

Hartwall – Renewable Energy for Brewery Operations

Hartwall’s brewery in Lahti operates entirely without fossil fuels. Behind this achievement is a biogas ecosystem developed by One1 specifically for Hartwall’s needs, with the design and implementation carried out by the team that today forms Gas1. The project was guided by Hartwall’s goals of achieving carbon neutrality and becoming the most responsible brewery in Europe. Two biogas reactors are located right next to Helsinki highway, serving as a visible landmark of the brewery’s commitment to sustainability.

In the process, brewers’ spent grain is transferred through a pipeline directly from Hartwall’s brewhouse to the biogas facility. From there, the material is pumped into the reactor, producing enough energy to cover the entire brewing operation’s demand (onko tämä totta?). The project also included the design of a logistics chain for returning the digestate to local barley fields — and the next barley crop from those fields returns once again to Hartwall’s production.

The construction of the biogas plant emphasized high quality, built to the same standards as large power plants. Hartwall’s biogas project is a prime example of how locally produced fossil-free energy can replace fossil fuels. The project is also highly cost-efficient.

The biogas plant was inaugurated in June 2023.

Pohjolan Perunan biokaasulaitos pienentää tuotannon hiilijalanjälkeä

Pohjolan Peruna, known best for its “Mummon” brand, has produced industrial potato products for more than sixty years. Its modern production facility manufactures fresh products, frozen goods, and dried potato products.

The production process generates several thousand tonnes of energy-rich side streams each year. By digesting these streams in a biogas plant, the company will replace approximately 700,000 litres of light fuel oil annually. In addition, part of the biogas will be used for electricity production.

Reducing the carbon footprint of food production and optimizing the use of side streams play a significant role in the biogas facility.

Located in the same yard as the production plant, the biogas unit utilizes the energy in these side streams with maximum efficiency. The growing energy output can be directly targeted to replace fossil fuels.

All material processed in the biogas plant is hygienized, allowing the nutrients contained in the side streams to be safely used in agriculture as organic-certified recycled fertilizers. Biogas digestion also increases the amount of soluble nitrogen in the digestate, improving its fertilizing effect.

The design, construction supervision, and commissioning of Pohjolan Peruna’s biogas project were carried out by personnel who transferred to Gas1 during the project.

Pielisen Bio | Lieksa

Our collaboration in Lieksa, Northern Karelia, began with a question: Could biogas play a role in the industrial energy transition?

Gas1 carried out a pre-study and a feasibility study, and the project has since moved into the delivery phase. The upcoming facility will produce renewable biogas to replace fossil energy sources in local industry.

Gas1 continues to provide lifecycle and monitoring services for the plant, ensuring long-term performance and efficiency.

We secured the permits, drafted the designs, identified the most cost-effective way to make use of investment subsidies, and launched the construction project.

Now, at the end of 2025, the plant is in its start-up phase. It has been connected via a gas distribution pipeline to the bakery, the dairy, the tire factory, and the laundry—together they consume the entire output of the biogas plant.

To supply the plant, an agroecological symbiosis has been established with local agriculture. Manure circulates through the plant and returns to the farms, underutilized fields have been brought back into productive use, generating income for their owners and contractors, and the plant delivers energy exactly as planned.

Jalofoods | Oy Soya Ab, Raasepori

Finland’s largest tofu factory, Oy Soya Ab, has taken a significant step toward circular economy solutions and carbon-neutral production. In collaboration with Gas1 and One1, a unique biogas plant was built for the factory to utilize the by-products generated in tofu production—mainly whey and okara.

The facility is a 1,100 m³ single-reactor biogas plant, a rare innovation in the food industry. The feedstock comes directly from the tofu frying process, and the heat energy contained in these streams is used to warm the reactor. The biogas produced is used primarily for generating process steam, and secondarily for electricity and heat production.

The results speak for themselves:

Since the commissioning of the biogas plant, the factory has been carbon-neutral and runs entirely on renewable energy.
The plant provides significant economic benefits and strengthens the company’s responsible business operations—a genuine competitive advantage for Finnish food production.
It is likely to be the only biogas plant in the world operating solely on soy-bean by-products.

Oy Soya Ab uses an energy-as-a-service model, which reduces investment risk and improves cost efficiency. Gas production began in the summer of 2022, and since then the factory has been a pioneer in sustainable development solutions.