Food Science and Biotechnology
→ Food Science and Biotechnology 2021 ; 30(3): 341-353
Recent advances in biotechnological valorization of brewers’ spent grain
Pradeep Puligundla1 • Chulkyoon Mok1
1 Department of Food Science and Biotechnology, Gachon University, Seongnam-si, Republic of Korea
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.
Brewers’ spent grain · Valorization · Biotechnology · Bioenergy · Single cell protein · Enzyme
Food Science and Biotechnology 2021 ; 30(3): 341-353