Macaloney Distillers aspires to the principals of sustainability using renewable, sustainable resources and also the responsible recycling of its waste products.
MBD’s whisky will be made from four natural ingredients only: water, yeast, grains (typically barley, rye or wheat), and oak.
There are no solvents used, nor toxic chemicals other than small volumes of food-grade cleaning chemicals (citric acid, mild sodium hydroxide). Yeast is self- propagating and therefore a renewable resource.
Water usage takes two forms: in-process water and cooling water. The former requires modest volumes most of which ends up in our ‘new make’ spirit and is casked as 62.5% abv spirit. The remainder of the process water exits the plant either as part of the spent grains which were mashed using the water (called draff) which will be collected by local cattle farmers for use as high nitrogen cattle feed, or as pot ale which is the residual liquor left in the pot stills after the ethanol, some water and flavour congeners have been distilled to form new make spirit. This pot ale is a natural, high protein and carbohydrate product created from the fermentation of the barley by the yeast, and the subsequent boiling of this ‘wash’. Its alcohol content is less than 0.5%. As such it has value as either a cattle feed supplement to the draff, or as a fertilizer to be spread on farmers fields. The left-over liquid in the spirit still is known as ‘spent lees’. This has a low BOD (approx. 1,500 mg/L) and is disposed of via regular waste disposal methods or waste treatment facility.
Both the draff and pot ale recycling methods will engage local farmers.