Department of Engineering, Università di Palermo, 90128 Palermo, Italy.
Int J Environ Res Public Health. 2021 Dec 10;18(24):13048. doi: 10.3390/ijerph182413048.
The aim of this study was to evaluate the effect of the inoculum to substrate ratio (ISR) and the mixture ratio between organic fraction of municipal solid waste (OFMSW) and sewage sludge (SS) on the methane production potential achievable from anaerobic co-digestion (AcoD). Biochemical Methane Potential (BMP) assays at mesophilic temperature were used to determine the best AcoD configuration for maximizing methane yield and production rate, as well as to address possible synergistic effects. The maximum methane yield was observed at ISR of 1 and 60% OFMSW: 40% SS as co-digestion mixture, whereas the highest methane production rate was achieved at ISR of 2 with the same mixture ratio (207 mL/gVS/d). Synergistic effects were highlighted in the mixtures having OFMSW below 60%, determining an increase of approximately 40% in methane production than the OFMSW and SS digestion as a sole substrate. The experimental data demonstrated that co-digestion of OFMSW and SS resulted in an increase in the productivity of methane than anaerobic digestion using the sole substrates, producing higher yields or production rates while depending on the ISR and the mixture ratio.
本研究旨在评估接种物与底物比（ISR）以及城市固体废物有机部分（OFMSW）与污水污泥（SS）之间的混合比对厌氧共消化（AcoD）可实现的甲烷生产潜力的影响。采用中温生物化学甲烷潜力（BMP）测定法，确定了最佳的 AcoD 配置，以最大限度地提高甲烷产率和生产速率，并解决可能的协同效应。在 ISR 为 1 和 60%OFMSW:40%SS 作为共消化混合物的情况下，观察到最大的甲烷产率，而在相同的混合物比（207 mL/gVS/d）下，ISR 为 2 时达到了最高的甲烷生产速率。在 OFMSW 低于 60%的混合物中突出了协同效应，与单独使用 OFMSW 和 SS 作为底物相比，甲烷产量增加了约 40%。实验数据表明，与单独使用底物进行厌氧消化相比，OFMSW 和 SS 的共消化导致甲烷的生产力提高，从而产生更高的产率或生产速率，具体取决于 ISR 和混合物比。
