Effects of Different Hydrolysis Methods on the Hydrolysate Characteristics and Photo-Fermentative Hydrogen Production Performance of Corn and Sorghum Straw

Qing Li, Youmin Jiang, Changpeng Ren, Qiushi Jiang, Jiali Feng, Minmin Wang, Zixuan Gao and Wen Cao ()
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Qing Li: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Youmin Jiang: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Changpeng Ren: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Qiushi Jiang: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Jiali Feng: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Minmin Wang: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Zixuan Gao: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China
Wen Cao: State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xianning West Road, Xi’an 710049, China

Energies, 2022, vol. 16, issue 1, 1-13

Abstract: The effects of hydrolysis methods (hydrothermal, acid, alkali, hydrothermal-enzyme, acid-enzyme, and alkali-enzyme) on hydrolysate characteristics and photo fermentative hydrogen production (PFHP) of corn straw (CS) and sorghum straw (SS) were investigated. The optimum production of reducing the sugar of straw in different solvent environments was studied by one-step hydrolysis and co-enzymatic hydrolysis pretreatment through a 3,5-dinitrosalicylic acid method. The hydrogen production process by photolytic fermentation of hydrolysates of Rhodobacter sphaeroides HY01 was further analyzed through a gas chromatograph, including the differences in accumulated PFHP yield, chemical oxygen consumption (COD), and volatile fatty acid (VFA) composition. The results showed that the highest reducing sugar yield was obtained by the acid method among one-step hydrolysis. In contrast, acid-enzyme hydrolysis can further increase the reducing sugar yield, which reached 0.42 g·g −1 -straw of both straws. Both CS and SS had the highest hydrogen yield from acid-enzyme hydrolysate, 122.72 ± 3.34 mL·g −1 -total solid of straw (TS) and 170.04 ± 4.12 mL·g −1 -TS, respectively, compared with their acid hydrolysates with 40.46% and 10.53% higher hydrogen yields, respectively. The use of enzymatic hydrolysis showed a significantly higher hydrogen yield for CS compared to SS, indicating that acid hydrolysis was more suitable for SS and acid-enzyme hydrolysis was more suitable for CS.

Keywords: agricultural straw; hydrolysis; reducing sugar; hydrogen; photo-fermentation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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