Efficient short-time hydrothermal depolymerization of sugarcane bagasse in one-pot for cellulosic ethanol production without solid-liquid separation, water washing, and detoxification. (November 2021)

• Record Type: Journal Article
• Authors: Zheng, Xiaojie; Xian, Xiaoling; Hu, Lei; Tao, Shunhui; Zhang, Xiaodong; Liu, Yao; Lin, Xiaoqing
• Is Part Of: Bioresource technology. Volume 339(2021)
• Publication Date: 2021-11
• Subjects: Cellulosic ethanol -- Liquid hot water -- Pretreatment -- Sugar cane bagasse -- One-pot; 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.2021.125575
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: SCB was pretreated using liquid hot water at 210 °C for a short time (0 min). Short-time hydrothermal depolymerization of SCB in one-pot was effective. One pot operation omits solid-liquid separation, water washing, and detoxification. The highest ethanol yield of 257 ± 5.51 mg/g SCB reached by SHF strategy. Abstract: In these studies, a low-cost and energy efficiency production of cellulosic ethanol from sugarcane bagasse (SCB) using one-pot without solid-liquid separation, water washing, and detoxification was performed. Firstly, SCB was pretreated using liquid hot water as the only reagent at 210 °C for a short time (0 min), and the solid liquid ratio (SLR) was 1:20 (w/v). Then, the whole slurry of pretreated SCB was enzymatically hydrolyzed and fermented for cellulosic ethanol in one-pot. The results indicated that the one-pot preparation for ethanol achieved a high total fermentable sugar conversion of 84.52 ± 1.24%, containing 88.61 ± 1.57% of glucose and 78.01 ± 1.63% of xylose. Moreover, the ethanol yield reached 257 ± 5.51 mg/g SCB, which was 77.56 ± 1.64% of the theoretical ethanol conversion from SCB. Importantly, there was no wastewater discharge in the whole process. Overall, the present work provides an economically feasible method for ethanol production.