Biohydrogen production using xylose or xylooligosaccharides derived from sugarcane bagasse obtained by hydrothermal and acid pretreatments

Lívian Ribeiro Vasconcelos de Sá, Mariana de Oliveira Faber, da Silva, Ayla Sant’Ana, Magali Christe Cammarota and Viridiana Santana Ferreira-Leitão

Renewable Energy, 2020, vol. 146, issue C, 2408-2415

Abstract: The employment of hemicellulose fractions from bagasse acid (HF-AC - rich in xylose) and hydrothermal (HF-HT - containing high amounts of xylooligosaccharides) pretreatments led to yields of 265 and 177 mLH2/gcarbohydrate after 18 and 45 h of fermentation, respectively. The anaerobic sludge used as inoculum was able to hydrolyze the xylooligosaccharides of HF-HT into simpler sugars, enabling microbial hydrogen production. The acid hydrolysis of xylooligosaccharides in HF-HT before fermentation improved the productivity by 30% and showed similar yield (231 mLH2/gcarbohydrate). The adaptive phase for HF-HT consumption was influenced by the hydrolytic step and by inhibitors, as the kinetics of hydrolyzed HF-HT was deeply affected in the first 18 h compared to HF-AC. Higher amounts of HF-AC in the media promoted fermentation inhibition, which could be related to the increased concentrations of acetic acid and carbohydrates, two factors that enhance the system osmolarity.

Keywords: Biohydrogen; Dark fermentation; 2G ethanol; Hemicellulose fraction; Xylose; Xylooligosaccharides (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:146:y:2020:i:c:p:2408-2415

DOI: 10.1016/j.renene.2019.08.089

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