Synchronized hydrogen-butanol coproduction, Congo red decolorization and food waste utilization in one-pot fermentation process

Jingyun Liu, Senqing Fan, Ke Bai and Zeyi Xiao

Renewable Energy, 2024, vol. 231, issue C

Abstract: In the study, one fermentation process integrating the hydrogen-butanol coproduction and the Congo red (CR) decolorization with the solid food waste (SFW) as the feedstock was developed, achieving triple benefits, SFW resource utilization, biofuel production and dye treatment. The SFW utilization efficiency was as high as 92 % and not influenced by the CR. The production of the hydrogen, butanol and total solvents were 5.8–7.8 LL-1, 9.2–9.9 gL-1 and 15.4–16.9 gL-1, respectively. The yield of hydrogen, butanol and the total solvent were 1.35–1.82 mol mol−1, 0.24–0.29 gg-1 and 0.42–0.51 gg-1, all higher than those of the control experiment (no CR addition). The decolorization efficiency were all higher than 98 % when the CR concentration was lower than 1000 mgL−1 with the maximum decolorization rate of 41 mgL−1h−1. The CR decolorization process didn't disturb the cell's original pathway. The efficiency of the electron conversion from SFW to main products, hydrogen, acetone, butanol and ethanol was 1%–18 % higher than that of the control experiment. The energy conversion efficiency of the SFW to main products was at 75–95 %, which were also higher than that of the control experiment.

Keywords: Solid food waste; Hydrogen; Butanol; Congo red; Decolorization; Electron distribution (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:231:y:2024:i:c:s096014812401070x

DOI: 10.1016/j.renene.2024.121002

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