Extraction and characterisation of arabinoxylan from brewers spent grain and investigation of microbiome modulation potential
Kieran M. Lynch, Conall Strain, Crystal N. Johnson, Dhrati Patangia, Catherine Stanton, Fatma Koç +4 more
European Journal of Nutrition
Abstract
PURPOSE: Brewers' spent grain (BSG) represents the largest by-product of the brewing industry. Its utilisation as an animal feed has become less practical today; however, its high fibre and protein content make it a promising untapped resource for human nutrition. BSG contains mainly insoluble fibre. This fibre, along with protein, is trapped with the complex lignocellulosic cell structure and must be solubilised to release components which may be beneficial to health through modulation of the gut microbiota. METHODS: In this study, the application of a simultaneous saccharification and fermentation process for the extraction and solubilisation of arabinoxylan from BSG is demonstrated. RESULTS: Processing of the BSG was varied to modulate the physicochemical and molecular characteristic of