期刊
BIORESOURCE TECHNOLOGY
卷 364, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128069
关键词
Biohydrogen production; Mannitol; Reducing power; Fermentation; Brown algae
资金
- National Natural Science Fun-dation of China
- Fundamental Research Funds for the Central Universities
- [52200041]
- [DUT20YG123]
- [DUT21RC (3) 003]
This study investigates the relationship between substrate reduction degree and hydrogen production performance by fermenting mannitol and mannitol-rich seaweed. The results show that higher reduction degree substrates yield higher hydrogen production and demonstrate the great application potential of brown algae fermentation for the co-production of hydrogen and butyrate.
In this study, mannitol and mannitol-rich seaweed were fermented to investigate the relationship between substrate reduction degree and hydrogen production performance. The results showed that acetate was required in mannitol fermentation with an optimum acetate/mannitol mass ratio of 1:5. Hydrogen production and yield of mannitol fermentation reached 123.76 mL and 2.12 mol/mol-mannitol, respectively, 42.02 % and 26.95 % higher than that of glucose, respectively. The acetate was fully assimilated and the butyrate selectivity reached 100 % in the effluent. Redox potential and electron distribution showed that mannitol increased the overall electron input from mannitol and acetate, leading to the increase in hydrogen and butyrate generation. Hydrogen yield reached 2.33 mol/mol-mannitol with brown algae hydrolysate, which was the highest ever reported. This study demonstrated that substrate with a higher reduction degree could yield higher hydrogen and showed the great application potential of brown algae fermentation for the co-production of hydrogen and butyrate.
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