Glendullan’s on-site bio-energy plant
Our second on-site bio-energy plant for Diageo was built at its Glendullan distillery in the Scottish Highlands. Treating whisky co-products.
What we did
Diageo is the world’s largest producer of spirits with a strong commitment to efficient and sustainable production. Our second on-site bio-energy plant for Diageo was built at its Glendullan distillery in the Scottish Highlands. Treating whisky co-products, it demonstrates how the whisky sector can embrace the circular economy. Replacing an existing aerobic plant at another site, the plant is both cutting the site’s carbon footprint and reducing production costs.
Key components of this bio-energy plant are:
Feedstock supply Distillery co-products including pot ale and spent lees, supplemented by feedstock piped from nearby distilleries.
Anaerobic reactor With no internal moving parts, the 3,000m3 AD tank uses external mixing to ensure optimal biogas output.
Solids separation The proprietary system recycles bio-degradable solids to boost COD removal, reducing liquid retention to 3 days.
Biogas handling Biogas, with a 55% methane content, is stored in the biodome, before combustion in the dedicated biogas boiler.
Aerobic treatment In a Sequential Batch Reactor, with pressure filtration prior to clean water discharge into the River Fiddich.
