Recovery and Applications of Proteins from Distillery By-Products

J. S. White*, Julio Enrique Traub, Dawn Louise Maskell, P. S. Hughes, A. J. Harper, N. A. Willoughby

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

12 Citations (Scopus)


Distilleries yield a number of by-products in addition to the principal spirit or fuel ethanol. These by-products originate from the feedstock, fermentation, and distillation residues. Those used as feeds include draff, pot ale syrup, and dark grains from malt whiskey distilleries and distillers' grains with solubles from grain and fuel ethanol distilleries. The grain-containing by-products are quite fibrous, and their use is mainly restricted to livestock feed. The evaporation of the liquid-based feeds is energy intensive and the equipment used is prone to fouling. Wider applications could result if low-energy processing techniques, which remove antinutritional compounds while preserving protein quality such as both amino acid profile and digestibility, were available. This review provides comprehensive information on by-products from whisky distilleries and bioethanol plants with a specific focus on North America and Europe. The generation of by-products, composition, volumes available, current uses, and potential to upgrade to higher-value protein feed ingredients are discussed. A detailed understanding of distillery by-products will enable the development of strategies to separate the protein components, maximize their use in feeds, and affect the overall sustainability of distilleries.

Original languageEnglish
Title of host publicationProtein Byproducts
Subtitle of host publicationTransformation from Environmental Burden Into Value-Added Products
EditorsGurpreet Singh Dhillon
Number of pages19
ISBN (Print)9780128023914
Publication statusPublished - 2016


  • By-products
  • Coproducts
  • DDGS
  • Distillery
  • Dried distillers' grains with solubles
  • Feed
  • Pot ale
  • Protein
  • Stillage
  • Whisky

ASJC Scopus subject areas

  • General Engineering
  • General Agricultural and Biological Sciences


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