Hepworth Brewery has become the first UK brewery to implement a full-scale wastewater-to-energy system using electro-methanogenesis technology, signifying a major advancement in sustainable brewing. This installation, developed in collaboration with Bristol-based clean-tech company WASE, converts brewery effluent into clean water, renewable biogas, and organic fertiliser, thereby creating a fully circular brewing model that enhances supply chain resilience and environmental stewardship.
Now operational after a successful six-month pilot, the system processes up to 17m³ of wastewater daily, generates 362MWh of renewable energy annually, and is expected to save over 100 tonnes of CO₂ emissions each year. This initiative eliminates the need for offsite wastewater haulage, reduces energy costs, and returns treated water to local ecosystems — an important factor in water-stressed areas like Sussex.
Andy Hepworth, managing director of Hepworth & Company Brewers, stated, “This project transforms a traditionally linear process into a circular model that benefits the brewer, the environment, and the wider agricultural community. We’re not just reducing our footprint — we’re building resilience into every pint.”
The installation aligns with Hepworth’s broader sustainability strategy, which includes the world’s first beer-source heat pump and solar integration. The brewery is on track to achieve 85% carbon neutrality by the end of 2025.
To commemorate the partnership, Hepworth and WASE have launched the Nexus beer series — three beers brewed using energy generated from wastewater. Each beer symbolises 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.
Dr Thomas Fudge, co-founder and CEO of WASE, remarked, “This is about more than just beer. It’s a bold, practical demonstration of how circular economies can be achieved today — without waiting for policy shifts.”
The Nexus series debuted during London Circular Economy Week (20–25 October), highlighting how innovation in brewing can lead the way in climate adaptation and regenerative practices.
