Glenfiddich previously sold the residue from its whisky production process to farmers for cattle feed, now recycles its waste products as fuel for its fleet of 3 modified delivery trucks, which are tasked with transporting whisky from the company's distillery

Glenfiddich stated that it has built fueling stations at its Dufftown distillery in north-eastern Scotland, specially designed to convert whisky production waste and residues into Ultra-Low Carbon Fuel (ULCF). The distiller claims that the biogas reduces the C02 emissions of its trucks by over 95 percent, as well as curbing other harmful particulates and greenhouse emissions by 99 percent when compared to its diesel delivery vehicles. Glenfiddich believes that each of its biogas-fueled trucks will have the capacity to displace close to 250 tons of CO2 in a year. The trucks used by the distiller are modified versions of Italian truck manufacturer Iveco's Stralis NP, which typically run on liquified gas.

https://interestingengineering.com/a-scotch-distiller-is-fueling-its-trucks-with-whisky-waste