Improved efficiency of brewer's spent grain arabinoxylans by ultrasound-assisted extraction

Ultrason Sonochem. 2015 May:24:155-64. doi: 10.1016/j.ultsonch.2014.10.010. Epub 2014 Oct 17.

Abstract

Arabinoxylan (AX) rich extracts from brewer's spent grain (BSG) were produced by the application of ultrasound-assisted extraction (UAE) and conventional alkaline extraction (AKE). UAE and AKE were optimised for the production of the highest yield of ethanol insoluble material using response surface methodology (RSM). The efficiency of UAE was established by the significant reduction of time (7h to 25 min) and energy when compared to AKE, to recover similar amounts of AX (60%) from BSG, leading to the production of starch-free AX-rich extracts.

Keywords: Arabinoxylans; Brewer’s spent grain; RSM; Ultrasound-assisted extraction.

MeSH terms

  • Carbohydrate Conformation
  • Chemical Fractionation / methods*
  • Edible Grain / chemistry*
  • Hydrogen-Ion Concentration
  • Plant Extracts / chemistry*
  • Ultrasonic Waves*
  • Xylans / chemistry*

Substances

  • Plant Extracts
  • Xylans
  • arabinoxylan