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Biobutanol production from sugarcane bagasse hydrolysate generated with the assistance of gamma-valerolactone

Author:
Kong, Xiangping, Xu, Hao, Wu, Hao, Wang, Chao, He, Aiyong, Ma, Jiangfeng, Ren, Xiaoqian, Jia, Honghua, Wei, Ce, Jiang, Min, Ouyang, Pingkai
Source:
Process biochemistry 2016 v.51 no.10 pp. 1538-1543
ISSN:
1359-5113
Subject:
acetone, batch fermentation, butanol, cell growth, ethanol, hydrolysates, hydrolysis, lignin, sodium chloride, solvents, sugarcane bagasse, sugars
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 24.08g/L total sugars. Removal of lignin significantly increased the total sugar concentration to 248.41g/L with a high yield of 0.87g/g. Due to the low level of inhibitors in hydrolysate, the obtained hydrolysate was used as substrate for biobutanol production. Batch fermentation with 41g/L sugars produced a high ABE concentration of 14.26g/L, including 4.1g/L acetone, 9.3g/L butanol and 0.86g/L ethanol. The fermentation with 61g/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.
Agid:
5303129