Case study - Wm Grant
01 Dec 2012
William Grant & Sons produce some of the world's best known
brands of Scotch Whisky, including Glenfiddich, The Balvenie range
of handcrafted single malts and Grant's.
The family-owned premium spirits company was the first Scotch
Whisky producer to generate energy from whisky by-products at its
Girvan site. The site is strategically important to William Grant
& Sons, producing grain whisky that forms the heart of the
popular Grant's blended whisky, Ailsa Bay Malt Whisky and
Hendrick's Gin. It also houses offices, a cooperage and over 40
The ground-breaking energy initiative, commissioned in 2009,
produces power in the form of steam and hot water for use on the
380 acre site and electricity, some of which is exported to the
The 2009 anaerobic reactor (AR) plant forms part of the
company's five year energy management plan which includes annual
targets for site energy reduction.
The AR plant allows the residual organic matter in the
distillery by-products to be converted into biogas by the presence
of microbes. This gas is burned in turbines to producer renewable
energy in the form of 25MWh of heat and 60MWh of electricity per
day. This significantly reduces the site's reliance on fossil
fuels. The scheme has the added benefit of improving the quality of
the site's effluent, with the chemical oxygen demand of the site's
effluent discharge being significantly reduced.
William Grant & Sons' multimillion investment in anaerobic
technology and the combined heat and waste power plant was
recognised in May 2010 when it was highly commended by the Carbon
Trust's Energy Efficiency in Manufacturing Award.
It remains the largest investment of this sort outside of the