WHERE WE OPERATE
Projects
Stream BioEnergy is expanding rapidly across Ireland and the UK. We currently own and operate biogas facilities in Northern Ireland and Scotland, with two additional projects under construction and more greenfield developments underway.
Biogas plays a crucial role in achieving net-zero targets, but just as importantly, it provides a sustainable solution to the growing challenge of managing agri-food organic waste. Across Ireland and the UK, untreated organic waste is placing increasing pressure on the environment.
Our developments are designed to meet the specific needs of each region, tailored to local waste challenges, always using waste-only feedstocks supporting a circular, low-carbon economy.
OPERATIONAL PLANTS
Tully Biogas plant, Ballymena, Northern Ireland
Stream BioEnergy owns and operates the Tully Biogas plant in Ballymena, Northern Ireland.
This plant processes 40,000 tonnes per annum of chicken litter, and in doing so produces 3MW of renewable electricity, enough to power 6,000 homes.
It is one of the first facilities in the world to use chicken litter as a sole feedstock at this scale and has been operating successfully since 2017. The Tully plant helps address a nutrient imbalance in Northern Ireland thereby reducing the negative effects excessive nutrients can have on the environment such as elevated nutrient levels in soils and watercourses, and harmful emissions to the atmosphere.
The project has been the recipient of several awards including:
- 2025 "Sustainable Company of the Year", Business Eye Sustainability & ESG Awards
- 2025 "Innovation in Sustainability", Business Eye Sustainability & ESG Awards
- 2017 Sustainable Ireland "Best Energy Generation Project" Award
- 2018 ADBA "Best Optimisation in AD" Award
OPERATIONAL PLANTS
Tambowie Biogas Plant, Glasgow, Scotland
Operational since 2023
This plant was acquired by Stream in 2023 as an operational facility. This plant has been operating since 2018 and transforms 70,000 tonnes per annum of distillery by-products into renewable energy and nutrient-rich digestate. In doing so it supports the important Scottish Whisky industry helping it achieves its sustainability targets.
PLANTS UNDER CONSTRUCTION
Tambowie Biogas Plant, Glasgow, Scotland
The Tambowie facility is undergoing a major engineering upgrade to expand capacity and transition from biogas to biomethane production. As the plant was not originally built by Stream, we are also carrying out significant refurbishment works to bring it in line with Stream BioEnergy’s health, safety, and environmental standards.
When construction and refurbishment works are completed in 2027, the facility will be able to process up to 170,000 tonnes per annum of distillery by-products generating 60 GWh of biomethane for export to the gas network. This project is certified under ISCC and UFAS.
PLANTS UNDER CONSTRUCTION
Little Island Biogas Plant, Cork, Ireland
We are currently constructing a new €80m state-of-the-art facility in Little Island, Cork. Once complete, it will be the largest biomethane generation plant in Ireland, providing significant environmental and economic benefits both locally and nationally. It will be dedicated to processing domestic and commercial ‘brown bin’ food waste converting 90,000 tonnes per annum into 81 GWh of biomethane. In addition to producing biofertiliser products, this facility will also generate food grade CO2 for use in local industry.
Construction has been underway since the beginning of 2025 and is progressing well. The plant is expected to be fully operational by the end of 2027.
Other Development Projects
Planning permission has been secured for two other projects with design works already underway ahead of construction commencing in the near future. This includes a large-scale expansion of the Tully Biogas Plant in Ballymena with permission granted for a facility to treat a further 200,000 tonnes per annum of poultry manure.
Planning permission has also been granted for the redevelopment of the Deerdykes Biogas Plant in Glasgow, Scotland, Stream acquired this facility from Scottish Water Horizons at the beginning of 2025. It started operations in 2011, converting 30,000 tonnes per annum of food waste into renewable electricity. This plant will be expanded and re-purposed to process up to 200,000 tonnes of food and beverage manufacturing by-products into 100 GWh of biomethane.
We are also progressing several other greenfield stage developments which are at various stages of the planning process. This includes proposed large-scale plants in the Republic of Ireland and the UK that specialise in processing poultry manure, similar to the successful Tully Biogas plant model. Each of these developments will support regional waste management needs and contribute to Ireland and the UK’s renewable energy and net-zero targets.