Diageo generates more than 6,000MW of heat from whisky waste


In its first year of production, Diageo’s anaerobic digestion facility at its Glendullan distillery in Speyside has generated 6,000MW hours of thermal energy.

The facility has converted approximately 1,000m3 of of malt co-products from the whisky distillation process to turn it into energy.


By generating renewable biogas that is used back in the distillation process in the form of heat, the plant helps to meet the Scottish Environment Protection Agency’s (SEPA) new plans for enhanced resource use and low carbon emissions.

The plant was built by Clearfleau.

Clearfleau chief executive Craig Chapman said: “With the distillery sector setting tougher sustainability targets, SEPA’s beyond compliance ‘one planet prosperity strategy’ endorses practical action, such as optimising energy output from unwanted products. We are working with Diageo and other distillers to deliver renewable energy solutions that support carbon reduction targets and a more circular approach to resource use.”