Bioenergy as a driver of industrial decarbonization
Industrial bioenergy: we transform waste into renewable energy
At SITRA, we put our more than 25 years of experience to work in the development of bioenergy projects . We design, build, and operate facilities that convert organic waste into biogas, biomethane, and biofertilizers , closing the loop of the circular economy and reducing our clients' energy dependence.
We understand the water-waste-energy triad as three inseparable elements. Our experience in industrial water management allows us to offer comprehensive solutions ranging from wastewater treatment to energy recovery from the generated waste.
Our bioenergy solutions
We develop bioenergy projects aligned with the energy transition
+ 40
GWh/year injected into the gas network
+ 30.000
tons of biofertilizers generated per year
+ 9.000
tons of CO 2 avoided annually
Biomethane, grid injection and circular economy
We manage hundreds of thousands of tons of agricultural waste that is converted into biofertilizers of high agronomic power.
Waste management and the application of this biofertilizer are carried out within a 20-kilometer radiusthus adding value to the farmer and minimizing the carbon footprint.
All of this translates into new jobs, income, and opportunities in some rural areas being revitalized by curbing depopulation: a medium-sized plant creates up to 40 direct and indirect jobs (MITECO).
Through this model, biomethane can cover up to 10% of the current natural gas consumption (PNIEC), reducing emissions and the country's energy dependence.
Discover our biomethane solutions
Biomethane is a renewable gas obtained by purifying biogas until it reaches the quality standards required for injection into the gas network.
At SITRA we develop large-scale biomethane production plants that transform agri-food waste, livestock by-products, and other materials into a clean and sustainable energy source.
The result is a certified renewable gas, suitable for use in industrial, domestic, and transportation applications, contributing to the decarbonization of key sectors and boosting the circular economy. Our plants already inject more than 40 GWh/year into the grid and produce more than 30.000 tons of biofertilizers annually, applied within a 20 km radius to minimize the carbon footprint and add value to the local agricultural sector.
Biogas: an energy solution for industry
We design and build industrial water treatment facilities that incorporate anaerobic digestion processes, in which biogas is generated as a renewable energy source.
This biogas can be used to cover part of the energy needs of the facility itself, helping to reduce both operating costs and the associated carbon footprint.
This technology allows energy savings of up to 70% and minimizes waste generation by up to 75% compared to conventional treatments.
Green hydrogen: our commitment to an efficient and responsible energy future
As specialists in industrial water treatment, we produce the ultrapure water required by the electrolyzers in green hydrogen plants.
Our experience in advanced treatment technologies positions us as a key technology partner in the development of renewable hydrogen projects in Spain and Europe.
The real impact of our bioenergy projects
+40
GWh/year injected into the gas network
+30000
tons/year of biofertilizers generated
+9000
t/ of CO2 avoided annually
+250
References in water and bioenergy management
Why choose SITRA for your bioenergy project?
At SITRA we do not limit ourselves to developing the engineering of projects; we participate in all stages of the bioenergy value chain.
This means that we accompany the client from beginning to end, from the feasibility study to the construction , commissioning and long-term operation of the facility.
We have a team of over 180 professionals specializing in water management, bioenergy, and technological innovation, and a 25-year track record that demonstrates our ability to execute complex projects in demanding industrial environments. We also participate in projects as investment partners, which aligns our interests with those of the client and guarantees our commitment to the outcome.
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Frequently asked questions about industrial bioenergy
What types of waste can be used to generate bioenergy?
In general, waste containing biodegradable organic matter can be recovered.
From industrial effluents and agri-food waste to manure, livestock by-products or sludge from water treatment, these materials contain energy that can be recovered in the form of biogas and biomethane.
At SITRA, we analyze each waste stream individually to determine its valorization potential, optimize energy production, and design the most suitable technology for each case. In this way, we transform a management cost into an opportunity for generating energy and value.
What is the difference between biogas and biomethane?
Biogas is the gas produced directly by anaerobic digestion—a mixture of methane and CO₂ primarily used for on-site energy consumption. Biomethane is biogas purified through upgrading technologies to achieve natural gas quality, allowing it to be injected into the grid or used as a transportation fuel. At SITRA, we work with both solutions, depending on each client's objectives.
How is a bioenergy project financed?
Every project has different financial needs. At SITRA, we help our clients design the financing structure that best suits their situation, combining their own resources, external financing, and public funding when appropriate.
Furthermore, we can participate as a technology and industrial partner, promoting collaborative, co-investment, or joint venture models that accelerate project development and align the interests of all parties. Our goal is to facilitate project implementation, not just design.
Furthermore, when public funding opportunities arise, SITRA can support the client in preparing the engineering, reports and technical information necessary to submit the application.
What regulations govern biomethane projects in Spain?
Biomethane projects are subject to a broad regulatory framework that varies depending on the characteristics of the facility, its location, the raw materials used, its capacity, and the final destination of the gas.
This framework includes, among others, environmental, urban planning, industrial, energy, waste and by-product management requirements, safety, sustainability and application of the best available techniques, as well as the connection and injection conditions when biomethane is intended for the gas network.
At SITRA we identify the regulations applicable to each project and assist the client in planning and coordinating the administrative procedures, authorizations and permits necessary for its development and implementation.
How long does a biogas or biomethane project take from start to operation?
An industrial biogas project connected to an existing wastewater treatment plant can be operational in 6 to 12 months. A newly constructed biomethane project—including permitting, engineering, and construction—typically requires between 18 and 36 months, depending on the scale and the complexity of the permits. We establish a detailed timeline from the first phase of the project.
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