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Biohydrogen Production from Pretreated Lgnocellulose by Clostridium thermocellum

文献类型： 外文期刊

作者： Cheng, Jing-Rong 1 ; Zhu, Ming-Jun 1 ;

作者机构： 1.S China Univ Technol, Sch Biosci & Bioengn, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China

2.S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China

3.S China Univ Technol, Guangdong Prov Key Lab Fermentat & Enzyme Engn, Guangzhou 510006, Guangdong, Peoples R China

4.Guangdong Acad Agr Sci, Sericultural & Agri Food Res Inst, Key Lab Funct Foods, Minist Agr,Guangdong Key Lab Agr Prod Proc, Guangzhou 510610, Guangdong, Peoples R China

关键词： Clostridium thermocellum;sugarcane bagasse;biohydrogen;consolidated bioprocessing;lignocellulose

期刊名称：BIOTECHNOLOGY AND BIOPROCESS ENGINEERING （ 影响因子：2.836； 五年影响因子：2.281 ）

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收录情况： SCI

摘要： In consolidated bioprocessing (CBP), the difference in optimum temperature between saccharification and fermentation poses a significant technical challenge to producing bioenergy efficiently with lignocellulose. The thermophilic anaerobic strain of Clostridium thermocellum has the potential to overcome this challenge if hydrolysis and fermentation is performed at an elevated temperature. However, this strain is sensitive to structure and components of lignocellulosic materials. To understand biohydrogen production from lignocellulosic materials, C. thermocellum was examined for biohydrogen production as well as bioconversion from different cellulosic materials (Avicel, filter paper and sugarcane bagasse (SCB)). We investigated hydrolysis-inhibitory effects of the cellulosic material types on the substrate degradation and biohydrogen production of C. thermocellum 27405. Within 168 h, the substrate degradation ratios of Avicel, filter paper, and SCB were 83.01, 51.78, and 42.19%, respectively. The substrate utilization and biohydrogen production of SCB reached 81 and 89.77% those of filter paper, respectively, indicating that SCB is a feasible substrate for biohydrogen production. Additionally, optimizing fermentation conditions can improve biohydrogen production, with the optimal conditions being an inoculum size of 7%, substrate concentration of 2%, particle size of 0.074 mm, and yeast extract concentration of 1%. This research provides important clues in relation to the low-cost conversion of renewable biomass to biohydrogen.

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