Recovery of reducing sugars and volatile fatty acids from cornstalk at different hydrothermal treatment severity. (January 2016)

• Record Type: Journal Article
• Authors: Zhu, Zhangbing; Liu, Zhidan; Zhang, Yuanhui; Li, Baoming; Lu, Haifeng; Duan, Na; Si, Buchun; Shen, Ruixia; Lu, Jianwen
• Is Part Of: Bioresource technology. Volume 199(2016)
• Page Start: 220
• Page End: 227
• Publication Date: 2016-01
• Subjects: Cornstalk -- Hydrothermal treatment -- Reducing sugars -- Volatile fatty acids -- Biohythane; 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.2015.08.043
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Cornstalk degradation and recovery of sugars and VFAs was studied at different HTS. Highest recovery of reducing sugars and VFAs was 92% of aqueous products. Rigid cornstalk morphology changed to molten structure via SEM as HTS increased. Significant changes of organic groups at different HTS identified via FT-IR and TGA. Hydrothermal treatment might be promising for biohythane production from biomass. Abstract: This study focused on the degradation of cornstalk and recovery of reducing sugars and volatile fatty acids (VFAs) at different hydrothermal treatment severity (HTS) (4.17–8.28, 190–320 °C). The highest recovery of reducing sugars and VFAs reached 92.39% of aqueous products, equal to 34.79% based on dry biomass (HTS, 6.31). GC–MS and HPLC identified that the aqueous contained furfural (0.35–2.88 g/L) and 5-hydroxymethyl furfural (0–0.85 g/L) besides reducing sugars and VFAs. Hemicellulose and cellulose were completely degraded at a HTS of 5.70 and 7.60, respectively. SEM analysis showed that cornstalk was gradually changed from rigid and highly ordered fibrils to molten and grainy structure as HTS increased. FT-IR and TGA revealed the significant changes of organic groups for cornstalk before and after hydrothermal treatment at different HTS. Hydrothermal treatment might be promising for providing feedstocks suitable for biohythane production.