Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
Bioresour Technol. 2021 Jul;331:125004. doi: 10.1016/j.biortech.2021.125004. Epub 2021 Mar 17.
Two-phase high-solid digestion is conducive to the degradation of food waste. In this study, Fe/C was added in high-solid digestion in different acidification and/or methanogenic phase. The experimental results indicated that it significantly increased the cumulative yield of biomethane. When Fe/C was added to the acidification phase only and both the acidification and methanogenic phases, the biomethane yield reached 474.07 ± 7.03 and 475.47 ± 4.68 mL·g VS , respectively, and the biodegradation rate reached 87.30% and 87.58%, respectively, indicating that Fe/C had mainly effect on the performance of acidification phase. In a two-phase anaerobic fermentation system, the activity of dehydrogenases and the concentration of coenzyme F were 2.23-2.95 mg·g·h and 0.0063-0.0294 mol·g volatile solids, respectively. Additionally, the archaeal communities production pathway of methane from using acetic acid to using hydrogen as the reactant.
两相高固体消化有利于食物垃圾的降解。在这项研究中，在不同的酸化和/或产甲烷相中添加了 Fe/C。实验结果表明，它显著提高了生物甲烷的累积产率。当仅在酸化相和酸化及产甲烷相中添加 Fe/C 时，生物甲烷产率分别达到 474.07±7.03 和 475.47±4.68 mL·g VS，生物降解率分别达到 87.30%和 87.58%，表明 Fe/C 主要影响酸化相的性能。在两相厌氧发酵系统中，脱氢酶的活性和辅酶 F 的浓度分别为 2.23-2.95 mg·g·h 和 0.0063-0.0294 mol·g 挥发性固体，此外，产甲烷菌利用乙酸作为反应物生成甲烷的途径。
