Sustainable biogas energy powering the Northern Greek border region.
The Resource Cycle
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We collect organic waste from local farmers and producers, transforming it into a valuable resource for our biogas facility.
[2]
Our biogas plant converts this waste into clean energy, providing a sustainable solution for the local border region.
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The residual biomass is returned to the soil, enriching the land and closing the loop of the local agricultural economy.
Hiring Local
We offer stable, skill-based career paths for community members living in Greece's vibrant border towns.
Our team strengthens the Greek economy by generating green jobs and aiding the stability of diverse agricultural producers across the nation.
Greek Impact
Circular Value
Greek agricultural waste becomes clean power, securing a sustainable loop for local communities.
Farming Strength
We assist Greek farmers by offering a steady income and ensuring their long-term productivity.
How Biogas is Produced from Agricultural Residue
Biogas is a renewable energy source generated through a natural biological process called anaerobic digestion — the breakdown of organic matter by microorganisms in the absence of oxygen and light.
The Process Step by Step
1. Feedstock Collection
Agricultural residues such as agro-industrial by-products are collected and transported to the biogas facility.
2. Pre-treatment & Feeding
The raw materials are mixed and homogenised in a feeding system before being introduced into sealed digester tanks. Solid and liquid feedstocks are blended to achieve the optimal consistency for efficient digestion.
3. Anaerobic Digestion
Inside the airtight digesters, billions of microorganisms break down the organic matter over several weeks.
This process occurs in four stages:
Hydrolysis – complex molecules are broken into simpler compounds
Acidogenesis – simple compounds are converted into fatty acids
Acetogenesis – fatty acids are transformed into acetic acid, hydrogen and CO₂
Methanogenesis – methane-producing bacteria generate biogas (CH₄ + CO₂)
4. Biogas Collection & Utilisation
The biogas produced — a mixture of approximately 50–70% methane (CH₄) and 30–50% carbon dioxide (CO₂) — is collected from the top of the digesters and fed into a Combined Heat and Power (CHP) unit, which converts it into electricity and heat simultaneously.
5. Digestate — A Valuable By-product
The remaining material after digestion, known as digestate, is a nutrient-rich organic fertiliser. It is separated into liquid and solid fractions and applied to local agricultural land, replacing synthetic fertilisers and closing the nutrient cycle.
Why Agricultural Residue?
Agricultural residues are an ideal feedstock for biogas production because they:
Are available locally
Would otherwise be disposed of as waste
Have high organic content suitable for digestion
Help reduce environmental pollution
Create a circular economy by turning waste into energy and fertiliser
The Result
From waste to energy — our biogas plant transforms agricultural by-products that would otherwise burden the environment into clean, renewable electricity, useful heat, and organic fertiliser, contributing to a greener and more sustainable local economy.
Get In Touch
Onbiogas Single Member SA operates its main offices in Thessaloniki and a specialized biogas plant in Metaxades, Evros. We are dedicated to providing sustainable energy to the Northern Greek border region.
Office: +30 2314 171 100
Main: Apollonos 43, Pylaia, Greece
Plant: Metaxades, Evros, Greece