LAPSE:2019.0621
Published Article
LAPSE:2019.0621
Water−Organic Solvent Extraction of Phenolic Antioxidants from Brewers’ Spent Grain
Antonio Zuorro, Annalaura Iannone, Roberto Lavecchia
July 11, 2019
Brewers’ spent grain (BSG) is the most abundant by-product of the brewing process. BSG is currently disposed of or used as a supplement for animal feed, although it contains significant amounts of bioactive compounds of great interest to the pharmaceutical, cosmetic and food sectors. In this study we investigate the feasibility of using a simple solvent extraction procedure to recover phenolic antioxidants from BSG. Acetone−water and ethanol−water mixtures were used as extraction solvents. Phenolic extracts obtained by treatment of BSG with the two solvent systems were characterized in terms of total phenolics and antioxidant activity. For both systems, the extraction yield was maximum at 60% (v/v) organic solvent concentration. At all solvent compositions, mixtures containing acetone provided higher extraction yields. As suggested by the strong correlation between the antioxidant activity of BSG extracts and their phenolic content, the antioxidant capacity of the extracts can be mainly attributed to polyphenols. Overall, the obtained results strongly support the exploitation of BSG as a source of phenolic antioxidants and the possibility of recovering them by a mild and green extraction process.
Keywords
brewers’ spent grain, phenolic compounds, solvent extraction, waste valorization
Subject
Suggested Citation
Zuorro A, Iannone A, Lavecchia R. Water−Organic Solvent Extraction of Phenolic Antioxidants from Brewers’ Spent Grain. (2019). LAPSE:2019.0621
Author Affiliations
Zuorro A: Department of Chemical Engineering, Materials and Environment, Sapienza University, 00185 Rome, Italy [ORCID]
Iannone A: Department of Chemical Engineering, Materials and Environment, Sapienza University, 00185 Rome, Italy
Lavecchia R: Department of Chemical Engineering, Materials and Environment, Sapienza University, 00185 Rome, Italy
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Journal Name
Processes
Volume
7
Issue
3
Article Number
E126
Year
2019
Publication Date
2019-03-01
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr7030126, Publication Type: Journal Article
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LAPSE:2019.0621
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doi:10.3390/pr7030126
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Jul 11, 2019
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CC BY 4.0
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Jul 11, 2019
 
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Jul 11, 2019
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Original Submitter
Calvin Tsay
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