Recent advances in biotechnological valorization of brewers' spent grain

• Published in: Food science and biotechnology Vol. 30; no. 3; pp. 341 - 353
• Main Authors: Puligundla, Pradeep, Mok, Chulkyoon
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.03.2021; Springer Nature B.V; 한국식품과학회
• Subjects: Alternative energy sources; Animal feed; Beer; biodiesel; Biodiesel fuels; Biofuels; Biogas; Biotechnology; Brewing; Butanol; byproducts; Chemistry; Chemistry and Materials Science; Circular economy; Ethanol; Feeds; Food Science; Grain; hydrogen; Immobilization; Minerals; Nutrients; Nutrition; Oligosaccharides; Organic acids; Proteins; Review; Single-cell protein; spent grains; value added; Vitamins; Xylitol; 식품과학; Single cell protein; Biotechnology; Bioenergy; Brewers' spent grain; Enzyme; Valorization
• ISSN: 1226-7708; 2092-6456; 2092-6456
• DOI: 10.1007/s10068-021-00900-4

Brewers' spent grain (BSG) is the most abundant by-product of beer-brewing. BSG is rich in nutrients such as protein, fiber, minerals, and vitamins, and therefore it is conventionally used as low-cost animal feed. On the other hand, alternative utilization of BSG has gained increased attention during recent years due to technological progress in its processing and the emergence of the concept of circular economy. The valorization of BSG through biotechnological approaches is environmentally friendly and sustainable. This review was focused on recent advancements in the conversion of BSG into value-added products, including bioenergy (ethanol, butanol, hydrogen, biodiesel, and biogas), organic acids, enzymes, xylitol, oligosaccharides, and single cell protein, via biotechnological approaches. In addition, the potential applications of BSG as immobilization matrices in bioprocesses have been reviewed.