Acetone-butanol-ethanol (ABE) production by Clostridium beijerinckii from wheat straw hydrolysates: Efficient use of penta and hexa carbohydrates

被引:71
作者
Bellido, Carolina [1 ]
Loureiro Pinto, Marina [1 ]
Coca, Monica [1 ]
Gonzalez-Benito, Gerardo [1 ]
Teresa Garcia-Cubero, Maria [1 ]
机构
[1] Univ Valladolid, Dept Chem Engn & Environm Technol, E-47011 Valladolid, Spain
关键词
Wheat straw; Steam explosion; Ozone pretreatment; ABE fermentation; Clostridium beijerinckii; ENZYMATIC-HYDROLYSIS; SIMULTANEOUS SACCHARIFICATION; SACCHAROMYCES-CEREVISIAE; BIOETHANOL PRODUCTION; DEGRADATION-PRODUCTS; RICE STRAW; PRETREATMENT; FERMENTATION; OZONOLYSIS; INHIBITORS;
D O I
10.1016/j.biortech.2014.06.020
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
ABE fermentation by Clostridium beijerinckii of steam-exploded and ozonated wheat straw hydrolysates was investigated. In steam-exploded hydrolysates, highest yields of 0.40 g/g ABE yield and 127.71 g ABE/kg wheat straw were achieved when the whole slurry from the pretreatment was used. In ozonated hydrolysates, 0.32 g/g ABE yield and 79.65 g ABE/kg wheat straw were obtained from washed ozonated wheat straw. Diverse effects were observed in steam explosion and ozonolysis of wheat straw which resulted in hemicellulose removal and acid insoluble lignin solubilization, respectively. SEM analysis showed structural differences in untreated and pretreated biomass. Depending on the operational strategy, after pretreatment and enzymatic hydrolysis, the glucose recovery ranged between 65.73-66.49% and 63.22-65.23% and the xylose recovery ranged between 45.19-61.00% and 34.54-40.91% in steam-exploded and ozonated hydrolysates, respectively. The effect of the main inhibitory compounds found in hydrolysates (oxalic acid, acetic acid, 5-hydroxymethylfurfural and furfural) was studied through ABE fermentation in model media. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:198 / 205
页数:8
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