Enhanced bio-hydrogen production from corn stalk by anaerobic fermentation using response surface methodology

The key process parameters of solid state enzymolysis for the generation of soluble sugar (SS) and bio-hydrogen production from corn stalk were optimized by the response surface methodology (RSM) based on a three factor-five level central composite design (CCD), respectively. The result showed that...

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Bibliographic Details
Published in:International journal of hydrogen energy 2011-10, Vol.36 (20), p.12770-12779
Main Authors: Xing, Yan, Fan, Shao-Qun, Zhang, Jing-Nan, Fan, Yao-Ting, Hou, Hong-Wei
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Bio-hydrogen
Biodegradation mechanism
Corn stalk
Energy
Exact sciences and technology
Fermentation
Fuels
Hydrogen
Response surface methodology
Solid state enzyme hydrolysis
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Summary:The key process parameters of solid state enzymolysis for the generation of soluble sugar (SS) and bio-hydrogen production from corn stalk were optimized by the response surface methodology (RSM) based on a three factor-five level central composite design (CCD), respectively. The result showed that the optimal solid state enzymolysis condition from corn stalk was 47.7 °C, SCED of 0.054 g/g and 10.3 days for the maximum SS yield of 526 mg/g-TVS. Correspondingly, the optimal enzymolysis conditions from corn stalk appeared at 46.3 °C, SCED of 0.049 g/g and 7.5 days for the maximum hydrogen yield of 205.5 mL/g-TVS from the hydrolyzed substrate by the next dark fermentation. In addition, the bio-hydrogen production mechanism from corn stalk was preliminary investigated by XRD and SEM analyses. The results suggested that the solid state enzymolysis of substrate played a vital role in the effective conversion of corn stalk into bio-hydrogen by dark fermentation. ► The key process parameters of solid state enzymolysis and bio-H 2 production from corn stalk were optimized by RSM. ► The soluble sugar (SS) yield of 526 mg/g-TVS appeared at 47.7 °C, SCED of 0.054 g/g and 10.3 days by enzymolysis of substrate. ► The enhanced H 2 yield of 205.5 mL/g-TVS was observed at 46.3 °C, SCED of 0.049 g/g and 7.5 days by H 2 fermentation. ► The bio-H 2 production mechanism of corn stalk was preliminary investigated by XRD and SEM analyses of samples. ► The solid state enzymolysis of substrate played a crucial role in efficient conversion of corn stalk into bio-H 2.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2011.07.065