RT info:eu-repo/semantics/article
T1 Microwave assisted hydrothermal as greener pretreatment of brewer’s spent grains for biobutanol production
A1 López Linares, Juan Carlos
A1 García Cubero, M.Teresa
A1 Lucas Yagüe, Susana
A1 González Benito, Gerardo
A1 Coca Sanz, Mónica
K1 BSG, Brewery waste, Microwave pretreatment, Lignocellulosic biomas,s ABE fermentation, Clostridium beijerinckii
K1 3302.90 Ingeniería Bioquímica
AB A microwave assisted hydrothermal pretreatment technology has been developed to recover fermentable sugars from brewer’s spent grain. Microwave hydrothermal pretreatment is considered as a greener pretreatment, as no acid or alkali are used as catalysts. An experimental design was planned to analyze the effect of pretreatment conditions (temperature and time). The objective was to maximize hemicellulosic sugar recovery in the liquid fraction and glucose recovery in enzymatic hydrolysis (referred to untreated BSG), as well as to minimize inhibitors in the liquid fraction to ensure ABE (acetone, butanol and ethanol) fermentability. Optimal conditions were 192.7 °C and 5.4 min, resulting in 64% hemicellulosic sugar recovery, 70% glucose recovery in enzymatic hydrolysate and 2.4 g/L total inhibitors. The liquid fraction obtained under optimal conditions was fermented with Clostridium beijerinckii, reaching a butanol concentration as low as 1 g/L. The butanol concentration could be improved by operating at higher solid loadings in pretreatment, which would increase fermentable sugar concentration. Enzymatic hydrolysis of pretreated BSG yielded a sugar solution, which was also fermented, resulting in a butanol concentration and overall yield of 8.3 g/L and 46 kg/t BSG, respectively.
PB ELSEVIER
SN 1873-3212
YR 2019
FD 2019
LK https://uvadoc.uva.es/handle/10324/73876
UL https://uvadoc.uva.es/handle/10324/73876
LA eng
NO Chemical Engineering Journal, Julio 2019, 368, 1045–1055
NO Producción Científica
DS UVaDOC
RD 22-ene-2025