Integrating bran starch hydrolysates with alkaline pretreated soft wheat bran to boost sugar concentration. (April 2020)

• Record Type: Journal Article
• Authors: Zhao, Jikai; Xu, Youjie; Zhang, Meng; Wang, Donghai
• Is Part Of: Bioresource technology. Volume 302(2020)
• Publication Date: 2020-04
• Subjects: Soft wheat bran -- Mild pretreatment -- Hydrolysate integration -- Fermentable sugar; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.122826
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Soft wheat bran (SWB) could be a potential candidate for biofuel production. Mild alkaline pretreatment reduced sugar decomposition and inhibitors formation. High sugar recovery (>75%) was obtained from dilute alkaline pretreatment. Integrating bran starch hydrolysates/alkaline treated SWB boosted sugar concentration. Abstract: Soft wheat bran (SWB), one of the most abundant byproducts from the wheat milling industry, is a potential candidate for biofuel production. In this study, bran starch hydrolysates were separately integrated with dilute acid pretreated SWB and alkaline pretreated SWB to boost fermentable sugar concentration. Alkaline pretreatment showed higher sugar recoveries than acid pretreatment. Significant sugar degradation for acid pretreatment was observed when pretreatment temperature higher than 170 ℃. The optimal pretreatment condition was 15% solid loading with 0.08 mol/L NaOH at 150 ℃ for 20 min. The neutralization reaction between dilute alkaline and released acids reduced sugar decomposition and inhibitors formation. Integrating bran starch hydrolysates with alkaline pretreated SWB yielded the highest glucose concentration of 50.91 g/L and a total sugar concentration of 101.29 g/L.