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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

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

Revista

Título: Industrial Crops and Products

Vol. 52

Páginas: 136-143

ISSN: 0926-6690

Editora: Elsevier

Indexação

ISI Web of Knowledge - 74 Citações

ISI Web of Science

Scopus - 83 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Ciências da saúde

CORDIS: Ciências da Saúde

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

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Nº de páginas: 8