Hepworth Brewery installs UK-first circular wastewater-to-energy system
Hepworth Brewery has become the first UK brewery to install a full-scale wastewater-to-energy system using electro-methanogenesis technology, marking a major milestone in sustainable brewing.
The installation, developed in partnership with Bristol-based clean-tech firm WASE, transforms brewery effluent into clean water, renewable biogas, and organic fertiliser — creating a fully circular brewing model that strengthens supply chain resilience and environmental stewardship.
The system, now operational following a successful six-month pilot, treats up to 17m³ of wastewater daily, generates 362MWh of renewable energy annually, and is projected to save over 100 tonnes of CO₂ emissions each year. The initiative eliminates the need for offsite wastewater haulage, reduces energy costs, and returns treated water to local ecosystems — critical in water-stressed regions like Sussex.
“This project transforms a traditionally linear process into a circular model that benefits the brewer, the environment, and the wider agricultural community,” said Andy Hepworth, managing director of Hepworth & Company Brewers. “We’re not just reducing our footprint—we’re building resilience into every pint.”
The installation complements Hepworth’s broader sustainability strategy, which includes the world’s first beer-source heat pump and solar integration. The brewery is on track to reach 85% carbon neutrality by the end of 2025.
To celebrate the partnership, Hepworth and WASE have launched the Nexus beer series—three beers brewed using energy generated from wastewater. Each beer represents a pillar of the water-energy-food nexus: Liquid Asset (lager), Electric Hop (IPA), and Botanic State (0.5% pale ale), crafted with local hops and organic barley from Sussex.
“This is about more than just beer,” said Dr Thomas Fudge, co-founder and CEO of WASE. “It’s a bold, practical demonstration of how circular economies can be achieved today — without waiting for policy shifts.”
The Nexus series debuts during London Circular Economy Week (20–25 October), spotlighting how innovation in brewing can lead the way in climate adaptation and regenerative practices.
