Biobutanol production from sugarcane bagasse hydrolysate generated with the assistance of gamma-valerolactone. Issue 10 (October 2016)

• Record Type: Journal Article
• Authors: Kong, Xiangping; Xu, Hao; Wu, Hao; Wang, Chao; He, Aiyong; Ma, Jiangfeng; Ren, Xiaoqian; Jia, Honghua; Wei, Ce; Jiang, Min; Ouyang, Pingkai
• Is Part Of: Process biochemistry. Volume 51:Issue 10(2016:Oct.)
• Page Start: 1538
• Page End: 1543
• Publication Date: 2016-10
• Subjects: Gamma-valerolactone -- Sugarcane bagasse -- Lignin removal -- Butanol production; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; Biochemistry -- periodicals; Biotechnology -- periodicals; Chemical Engineering -- periodicals; Génie biochimique -- Périodiques; Biotechnologie -- Périodiques; Biochemical engineering; Biotechnology; Periodicals; 660.63
• DOI: 10.1016/j.procbio.2016.06.013
• Languages: English
• ISSNs: 1359-5113

Abstract

Graphical abstract: Highlights: Sugarcane bagasse was hydrolyzed with the assistance of gamma-valerolactone. Removal of lignin significantly increased the sugar concentration. Low concentration of inhibitors was generated during the hydrolysis. The obtained hydrolysate was successfully used for butanol production. Abstract: Production of butanol from renewable resources is an attractive approach for introducing an economically competitive process. In the present study, sugarcane bagasse was hydrolyzed with the assistance of gamma-valerolactone (GVL). After phase separation, direct hydrolysis of sugarcane bagasse resulted in 24.08 g/L total sugars. Removal of lignin significantly increased the total sugar concentration to 248.41 g/L with a high yield of 0.87 g/g. Due to the low level of inhibitors in hydrolysate, the obtained hydrolysate was used as substrate for biobutanol production. Batch fermentation with 41 g/L sugars produced a high ABE concentration of 14.26 g/L, including 4.1 g/L acetone, 9.3 g/L butanol and 0.86 g/L ethanol. The fermentation with 61 g/L sugars greatly inhibited cell growth and solvent production due to the high concentration of NaCl and GVL. This study demonstrates that sugarcane bagasse hydrolyzed in GVL/water solution could be an alternative substrate for the low-cost production of biobutanol.