Journal
BIORESOURCE TECHNOLOGY
Volume 268, Issue -, Pages 52-59Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.07.126
Keywords
Biohydrogen; Dark fermentation; Macroalgae; Laminaria japonica; Pretreatment
Funding
- National Natural Science Foundation of China, China [51338005]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13026]
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Suitable pretreatment can effectively enhance the fermentative hydrogen production from algae biomass. In this study, combined microwave-acid pretreatment was applied to disintegrate the biomass of macroalgae L. japonica, and dark fermentation in batch mode was conducted for hydrogen production. The results showed that combining microwave pretreatment at 140 degrees C and 2450 MHz with 1% H2SO4 for 15 min could effectively disrupt macroalgal cells and release the organic matters, and soluble chemical oxygen demand (SCOD) concentration increased by 1.92-fold and achieved 5.12 g/L. During the fermentation process, both polysaccharides and proteins were consumed. Hydrogen production process was dominated by acetate-type fermentation, and the dominance of genus Clostridium contributed to more efficient hydrogen production. After the pretreatment, hydrogen yield increased from 15 mL/g TS added to 28 mL/g TS added , and energy conversion efficiency increased from 9.5% to 23.8%. Combined microwave-acid pretreatment is potential in enhancing hydrogen production from the biomass of L. japonica.
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