Correlation between ethanol addition and photo-fermentative biohydrogen production of Arundo donax L. with a consortium

Danping Jiang, Lei Zhang, Wenjun Pei, Zhipeng Song, Tian Zhang, Yanyan Jing, Zhou Chen, Wenzhe Li, Quanguo Zhang and Chaoyang Lu

Renewable Energy, 2025, vol. 248, issue C

Abstract: Photo-fermentative biohydrogen production (PFHP) with lignocellulosic biomass helps for the reduction of carbon release. The correlation between ethanol addition with cell growth, biohydrogen production, and soluble by-products production was investigated to reveal the role that ethanol plays. For the purpose, box plot analysis and correspondence analysis were respectively adopted to evaluate the correlation between ethanol loadings and cell biomass and biohydrogen production during the processes of cell growth and PFHP. During the cell growth process, ethanol addition up to 2.0 % would play a negative role in cell growth while lower ethanol loadings (0.5 % and 1.0 %) did not have significant effluence on cell growth. Additionally, during the PFHP process, 1.0 % ethanol addition achieved the maximum hydrogen yield (HY) of 83.3 mL/g TS, which was 10.8 % higher than that of no ethanol. Furthermore, correspondence analysis (CA) revealed that 1.0 % ethanol addition had the closest positive relationship with hydrogen yield and hydrogen production rate (HPR), while 4.0 % ethanol reversed the relationship. The results demonstrated efficiency of proper ethanol addition (1.0 % in this study) as an effective hydrogen yield enhancement method.

Keywords: Ethanol addition; Cell growth; Biohydrogen production; Photo-fermentation; Correlation (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:248:y:2025:i:c:s0960148125007396

DOI: 10.1016/j.renene.2025.123077

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