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Mesophilic versus thermophilic anaerobic digestion of cattle manure: methane productivity and microbial ecology.

Moset V, Poulsen M, Wahid R, Højberg O, Møller HB - Microb Biotechnol (2015)

Bottom Line: In this study, productivity and physicochemical and microbiological (454 sequencing) parameters, as well as environmental criteria, were investigated in anaerobic reactors to contribute to the ongoing debate about the optimal temperature range for treating animal manure, and expand the general knowledge on the relation between microbiological and physicochemical process indicators.In addition, the effect of the hydraulic retention time was evaluated (16 versus 20 days).Thermophilic anaerobic digestion showed higher organic matter degradation (especially fiber), higher pH and higher methane (CH₄) yield, as well as better percentage of ultimate CH₄ yield retrieved and lower residual CH₄ emission, when compared with mesophilic conditions.

View Article: PubMed Central - PubMed

Affiliation: Department of Engineering, Aarhus University, Blichers Allé 20, DK 8830, Tjele, Denmark.

No MeSH data available.


Related in: MedlinePlus

Phylum Firmicutes community composition as percentage of reads at order level in the cattle manures used to feed the reactors and in the thermophilic (50°C) and the mesophilic (35°C) reactors at the end of each experimental period. Each measure represents the average of two replicates.
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fig06: Phylum Firmicutes community composition as percentage of reads at order level in the cattle manures used to feed the reactors and in the thermophilic (50°C) and the mesophilic (35°C) reactors at the end of each experimental period. Each measure represents the average of two replicates.

Mentions: Within the Clostridia class, members of the Clostridiales order dominated in the cattle manures (around 30% of the total reads) and in the mesophilic reactors (more than 20% of the total reads) (Fig. 6). The thermophilic reactors, however, were dominated not only by members of the Clostridiales order (around 15% of the total reads), but also by members of the Halanaerobiales order (around 10% of the total reads) especially members of the Halanaerobiaceae family and other unknown Clostridia (around 20% of the total reads in full-scale thermophilic reactor and around 40% of the total reads in pilot-scale thermophilic reactors).


Mesophilic versus thermophilic anaerobic digestion of cattle manure: methane productivity and microbial ecology.

Moset V, Poulsen M, Wahid R, Højberg O, Møller HB - Microb Biotechnol (2015)

Phylum Firmicutes community composition as percentage of reads at order level in the cattle manures used to feed the reactors and in the thermophilic (50°C) and the mesophilic (35°C) reactors at the end of each experimental period. Each measure represents the average of two replicates.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4554467&req=5

fig06: Phylum Firmicutes community composition as percentage of reads at order level in the cattle manures used to feed the reactors and in the thermophilic (50°C) and the mesophilic (35°C) reactors at the end of each experimental period. Each measure represents the average of two replicates.
Mentions: Within the Clostridia class, members of the Clostridiales order dominated in the cattle manures (around 30% of the total reads) and in the mesophilic reactors (more than 20% of the total reads) (Fig. 6). The thermophilic reactors, however, were dominated not only by members of the Clostridiales order (around 15% of the total reads), but also by members of the Halanaerobiales order (around 10% of the total reads) especially members of the Halanaerobiaceae family and other unknown Clostridia (around 20% of the total reads in full-scale thermophilic reactor and around 40% of the total reads in pilot-scale thermophilic reactors).

Bottom Line: In this study, productivity and physicochemical and microbiological (454 sequencing) parameters, as well as environmental criteria, were investigated in anaerobic reactors to contribute to the ongoing debate about the optimal temperature range for treating animal manure, and expand the general knowledge on the relation between microbiological and physicochemical process indicators.In addition, the effect of the hydraulic retention time was evaluated (16 versus 20 days).Thermophilic anaerobic digestion showed higher organic matter degradation (especially fiber), higher pH and higher methane (CH₄) yield, as well as better percentage of ultimate CH₄ yield retrieved and lower residual CH₄ emission, when compared with mesophilic conditions.

View Article: PubMed Central - PubMed

Affiliation: Department of Engineering, Aarhus University, Blichers Allé 20, DK 8830, Tjele, Denmark.

No MeSH data available.


Related in: MedlinePlus