Building the Infrastructure Behind the Biomethane Economy
Developing and operating biomethane infrastructure that delivers renewable gas, biogenic CO₂ and agricultural value through long-term, multi-output systems.
Our mission
Design, build, own and operate biomethane infrastructure that strengthens energy security and delivers long-term value across energy, carbon and agriculture systems.
Why It Matters
Transforming organic feedstocks into renewable gas, biogenic CO₂ and nutrient-rich bio-fertiliser, our biomethane platform creates resilient revenue streams across multiple markets while reducing reliance on imported fossil fuels and helping industries navigate the transition to lower-carbon operations.
1TWh
of carbon-negative renewable gas by 2030. Delivering clean, renewable energy and reducing reliance on fossil fuels.
15
industrial-scale biomethane plants owned and operated throughout the UK.
800,000+
tonnes of CO2 saved per annum. Reducing emissions by converting organic waste into sustainable energy for a cleaner planet.
The GMT Platform
Design
Every project begins with a detailed understanding of feedstocks, site conditions, infrastructure requirements and long-term commercial outcomes. We develop biomethane platforms that are technically robust, commercially viable and designed to maximise the advantages of GMT's Plug Flow Reactor (PFR) technology.
Build
We manage the delivery of biomethane infrastructure through a disciplined development and construction process. From planning and engineering through to commissioning, our focus is on creating assets that are safe, efficient and built to perform reliably.
Own
As a long-term infrastructure platform, we maintain a direct interest in the assets we develop. This ownership model aligns decision-making with long-term performance, supporting responsible stewardship and sustained value creation across energy, carbon and agriculture systems.
Operate
Long-term value is created through consistent operational performance. We oversee the ongoing operation and optimisation of infrastructure assets, applying proven operational processes and the controlled digestion benefits of Plug Flow Reactor technology to support reliable biomethane production and long-term asset performance.
Who we work with
Infrastructure & Development
Working with landowners, feedstock suppliers and project stakeholders to develop biomethane infrastructure designed for long-term performance.
Energy, Carbon & Agricultural Markets
Connecting renewable gas, biogenic CO₂ and agricultural outputs to sectors seeking secure, long-term supply: data centres, maritime, industry and more.
Communities & Energy Security
Developing infrastructure that supports domestic energy security while creating resilient revenue streams for local communities and the wider UK economy.
Powered by GMT Plug Flow Reactor Technology
A proprietary digestion process designed to support predictable retention times, efficient feedstock conversion and long-term operational performance.
Unlike conventional continuously stirred tank reactors (CSTRs), where material is constantly mixed within large circular tanks, GMT's Plug Flow Reactor (PFR) technology moves feedstock through a controlled linear pathway from one end of the reactor to the other.
This approach creates a more predictable digestion process, helping to optimise retention times, improve feedstock utilisation and support consistent biomethane production.
PFR technology also changes the physical footprint of a project. With a lower profile than traditional AD tanks, GMT facilities can be integrated more sympathetically into the surrounding landscape while maximising the performance required for commercial-scale biomethane production.
Proven Through Delivery
More than 15 years of experience across the design, delivery and operation of biomethane infrastructure.
Phillip Greenaway
Founder & CTO
"For over a decade, we've refined and developed our PFR technology to make biomethane production more efficient, scalable, and reliable."
14
Years of Innovation
We're continually advancing our biogas technology, ensuring higher yields, lower costs, and greater long-term sustainability.
40+
PFR Projects
Designed, built, and commissioned to produce renewable energy from waste over fossil fuels.
80+
New Employment Opportunities
Created across local regions and improving communities.
3.5 million
Operating Hours
Extensive real-world experience committed to long-term efficiency and reliability for renewables.
Trusted by some industry leaders. Find out more about us and our certifications
Message us
Whether you're a landowner, project partner, feedstock supplier or energy offtaker, we'd welcome a conversation about the role our biomethane platform can play in your long-term plans.