Anaerobic co-digestion of organic fractions of municipal solid waste: Synergy study of methane production and microbial community

Zhou, Yiran; Huang, Kangyi; Jiao, Xiuyao; Stanisavljević, Nemanja; Li, Lei; Vujovic, Svjetlana; Peng, Xiangjun; Wang, Xiaoming

doi:10.1016/j.biombioe.2021.106137

Cited by 27 publications

(2 citation statements)

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“…Table 6 presents the calculated values on the synergistic and antagonistic effects during the anaerobic co-digestion of silage mixture with cow manure. Synergistic effect refers to an increase in the amount of methane produced compared to the sum of the methane contributed by individual substrates [61]. In this study, the highest percentage difference between weighted and observed methane yields of 13.66% was noticed at a SM:CM feed mix ratio of 50-50 (Table 6).…”

Section: Synergistic and Antagonistic Effectmentioning

confidence: 55%

“…The C/N ratio is considered as a fundamental parameter in defining the synergistic effect during anaerobic co-digestion. It is reported that at an optimal C/N ratio, the anaerobic digestion process is stable as it allows the growth of all pertinent microbial populations [61]. On the contrary, antagonism is observed as a reduction in methane production during the co-digestion and is due to an increase in the organic load and/or accumulation of intermediate metabolites and prolonged lag phase [65].…”

Section: Synergistic and Antagonistic Effectmentioning

confidence: 99%

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Anaerobic Digestion of Spoiled Maize, Lucerne and Barley Silage Mixture with and without Cow Manure: Methane Yields and Kinetic Studies

Sarode,

Kumar,

Mathias

et al. 2023

Energies

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The effect of different inoculum-to-substrate ratios (ISRs) and feed mix (FM) ratios on the kinetics of methane production and yields during anaerobic digestion of spoiled silage mixture (SM) alone or co-digestion with cow manure (CM) was investigated in batch experiments at 37 °C. The silage mixture was prepared from spoiled silages of maize, lucerne and barley in equal proportions of 33% by wet weight. The effect of ISRs of 0.5, 1, 2 and 4 showed that methane yields increased with an increased ISR ratio. At ISRs of 1, 2 and 4, methane yields of 262.18 ± 14.96, 387.77 ± 14.43 and 482.23 ± 38.47 NmL CH4/gVSadded were obtained, respectively. Incubation at ISR 0.5 resulted in low methane yields (174.49 ± 9.29 NmL CH4/gVSadded) due to build-up of volatile fatty acids (VFAs). Further, co-digestion of spoiled SM with CM showed that the highest methane yields of 387.77 and 382.86 NmL CH4/gVSadded were obtained at SM:CM feed mix ratios of 100–0 and 75–25, respectively. The corresponding volatile solids (VS) removal rates were 72.80% and 70.82%, respectively. However, the best synergistic effect was noticed at a SM:CM = 50–50 feed mix ratio. Thus, this study shows that anaerobic digestion of spoiled silages is feasible and co-digestion of spoiled silage mixed with cow manure at a SM:CM feed mix ratio of 75–25 is recommended.

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Section: Synergistic and Antagonistic Effectmentioning

confidence: 55%

Section: Synergistic and Antagonistic Effectmentioning

confidence: 99%