Magdalena Jose Antonio, Pérez-Bernal María Fernanda, Bernet Nicolas, Trably Eric
LBE, Univ Montpellier, INRAE, 102 avenue des Étangs, 11100 Narbonne, France; Vicerrectorado de Investigación y Transferencia de la Universidad Complutense de Madrid, 28040 Madrid, Spain.
LBE, Univ Montpellier, INRAE, 102 avenue des Étangs, 11100 Narbonne, France.
Bioresour Technol. 2023 Apr;374:128803. doi: 10.1016/j.biortech.2023.128803. Epub 2023 Feb 27.
Hydrogen production from food waste by coupling dark fermentation (DF) and microbial electrolysis cells (MEC) was studied. Metabolic patterns in DF, their effects on MECs efficiency, and the energy output of the coupling were investigated. Mesophilic temperature and acidic pH 5.5 resulted in 72 ± 20 mL H/g CODin and a butyrate-enriched profile (C2/C4, 0.5-0.6) contrasting with an acetate-enriched profile (C2/C4, 1.8-1.9) and 36 ± 10 mL H/g CODin at pH 7. Assessment in series of the DF effluents in MECs resulted in a higher hydrogen yield (566-733 mL H/g CODin) and volatile fatty acids (VFAs) removal (84-95%) obtained from pH 7 effluents compared to pH 5.5 effluents (173-186 mL H/g CODin and 29-59%). Finally, the output energy was lower in DF at pH 7, however, these effluents retrieved the highest energy in the MEC, showing the importance of process pH and VFAs profile to balance the coupling.
研究了通过耦合暗发酵（DF）和微生物电解池（MEC）从食物垃圾中制氢。研究了DF中的代谢模式、它们对MEC效率的影响以及耦合系统的能量输出。中温温度和酸性pH 5.5条件下，产生的氢气量为72±20 mL H/g CODin，且呈现富含丁酸盐的分布特征（C2/C4，0.5 - 0.6），这与富含乙酸盐的分布特征（C2/C4，1.8 - 1.9）形成对比，而在pH 7时氢气产量为36±10 mL H/g CODin。对MEC中DF流出物进行串联评估发现，与pH 5.5的流出物（173 - 186 mL H/g CODin和29 - 59%）相比，pH 7的流出物具有更高的氢气产量（566 - 733 mL H/g CODin）和挥发性脂肪酸（VFA）去除率（84 - 95%）。最后，pH 7时DF的输出能量较低，然而，这些流出物在MEC中获得了最高能量，这表明过程pH和VFA分布特征对于平衡耦合系统的重要性。
