ENERGY
Biogas: clean energy from natural recycling
A renewable resource combining clean energy and sustainable agriculture
Biogas is a renewable source that enables sustainable energy production by transforming waste and biomass into resources.
The process occurs through anaerobic digestion, which is the fermentation of organic residues and agricultural crops in the absence of oxygen. Inside the digesters, maintained at controlled temperature, active microorganisms convert the raw material into biogas, primarily composed of methane (50-70%) and carbon dioxide, with small quantities of other gases.
The generated biogas powers cogeneration plants, capable of producing electricity for the grid, contributing to emissions reduction and energy transition.
An additional benefit is the digestate, the process residue: an odorless substance with solid and liquid components, rich in nutrients. This product has high agronomic value and is used as a natural fertilizer, replacing chemical fertilizers and thus closing the sustainability circle.
How a biogas plant works
A biogas plant operates on a natural and sustainable cycle, starting from waste and producing energy and fertilizers.
ANIMAL MANURE
Manure from livestock farms represents one of the main raw materials: solid and liquid manure are collected and conveyed to the plant.
DEDICATED AGRICULTURAL CROPS
Alongside livestock waste, specific crops dedicated to biogas production (such as corn, sorghum, or triticale) are used, ensuring a constant supply of biomass.
BIOGAS PLANT
The biomass is fed into the anaerobic digester, a closed environment with controlled temperature, where natural microorganisms initiate the oxygen-free fermentation process. The result is the production of biogas and digestate.
COGENERATOR
The produced biogas powers a cogenerator, which transforms the energy contained in the gas into:
– Electrical energy, fed into the grid;
– Thermal energy, usable for heating or business processes.
POWER GRID
The produced electrical energy is fed directly into the national grid, contributing to renewable energy supply and reducing fossil fuel sources.
SOLID AGRICULTURAL FERTILIZER
The solid residue from the digestion process is used as organic soil improver: a natural fertilizer rich in nutrients.
LIQUID AGRICULTURAL FERTILIZER
The liquid portion of the digestate is also utilized as natural fertilizer, easily absorbable by agricultural land.
BIOMETHANE: the green future of energy
A renewable fuel that replaces fossil fuels and reduces emissions
Biomethane is a renewable fuel obtained by purifying biogas, removing carbon dioxide, water, and other impurities, to achieve a gas with characteristics very similar to fossil methane.
Thanks to this process, biomethane can be directly injected into the national distribution network or used as transport fuel, contributing concretely to CO₂ emissions reduction and the transition towards a more sustainable economy.
The biomethane production of Greenway Group is part of a local agricultural chain that enhances local resources and ensures energy independence. In this case too, the process generates digestate, a by-product with high agronomic value that is reused in the fields, thus closing a virtuous cycle of circular economy.
Plants
Plants
location of our plants
The Greenway Group’s plants are distributed in the heart of central Friuli and ensure a total production of 17,900,000 kWh per year, sufficient to cover the energy needs of approximately 7,000 families.
Adjacent to each plant are agricultural lands dedicated to growing energy crops, used for biogas production in a short and sustainable supply chain.
17.9 ml
7.000
KWH/YEAR
FAMILIES
17.9 ml
KWH/YEAR
7.000
FAMILIES
Bertiolo Plant
The Greenway plant, located in the industrial area of Bertiolo, has a power capacity of 1 Megawatt and can produce almost 8,000 MWh per year.
The plant is powered by a local agricultural chain composed of companies that cultivate all the necessary biomass on Greenway’s lands.
In addition to energy, the plant also produces digestate, a natural organic material used to fertilize agricultural land, improving its quality.
The technology used comes from the German company Schmack Biogas, European leader in biogas plant construction.
San Daniele Plant
The Greenway plant is located in an area adjacent to the industrial zone of San Daniele and is harmoniously integrated into a small wood that mitigates its visual impact, blending it with the surrounding environment.
In this case too, production is based on an indigenous agricultural supply chain, sharing the same characteristics as Greenway’s: sustainable, local, and closely connected to the territory.
Thanks to the strategic alliance with FITT SPA, during 2025 we launched the Biomethane project by converting the plant.
Starting from 2026, gas production will begin, which will then be directly injected into the Snam network.