Valuation of brewer's spent grain using a fully recyclable integrated process for extraction of proteins and arabinoxylans

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Vieira, E. (Author) Other; Rocha, A. (Author) Other; Coelho, E. (Author) Other; Pinho, Olívia (Author) FCNAUP; Saraiva, J. (Author) Other; Ferreira, I. (Author) FFUP; Coimbra, M. (Author) Other

Journal

Title: Industrial Crops and Products

Vol. 52

Pages: 136-143

ISSN: 0926-6690

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 74 Citations

ISI Web of Science

Scopus - 83 Citations

Scientific classification

FOS: Medical and Health sciences > Health sciences

CORDIS: Health sciences

Other information

Authenticus ID: P-008-GRR

DOI: 10.1016/j.indcrop.2013.10.012

Abstract (EN): The objective of this work was to design an integrated process to valuate brewer's spent grain (BSG) proteins and arabinoxylans (AX) to be used as food ingredients. For this purpose, a sequential extraction of proteins and AX from BSG with increasing alkali (KOH or NaOH) concentrations of 0.1 M, 0.5 M, and 4 M, was optimized. A ratio of 1:2 (w/v) (weight of BSG by volume of alkali solution) at room temperature for 24 h was preferred to minimize reagents and energy consumption. To fully integrate the process, alkaline extracts were acidified to pH 3 with citric acid, to obtain the protein-rich fractions. The AX were recovered by ethanol precipitation and citric acid and ethanol were recycled. This integrated extraction process allowed a yield of 82-85% of the BSG total proteins and 66-73% of total AX with formation of a cellulose rich residue almost devoid of nitrogen.

Language: English

Type (Professor's evaluation): Scientific

Notes: <a href="http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord&KeyUT=000332189200020">Indexado na ISI Web of Science</a>

No. of pages: 8