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Post-digestate composting shifts microbial composition and degrades antimicrobial resistance genes
- Source :
- Bioresource technology. 340
- Publication Year :
- 2021
-
Abstract
- Post-digestate treatments may reduce the risk linked to Antibiotic Resistant Genes (ARGs) release with digestate direct land application. Thus, this study aimed to evaluate post-digestate composting and co-composting with biogas production feedstock (maize silage, food processing waste, and poultry litter) effect on abundance of selected ARGs: erm(B), tet(K), tet(M), tet(O), and tet(S) genes. More than 80% of all ARGs were removed after 90 days of composting but removals from co-composting were lower. Bacteroidetes, Firmicutes, and Proteobacteria dominated fresh digestate, and a network analysis indicated that these were potential hosts of ARGs. The emergence of Actinobacteria (dominant), Planctomycetes, and Verrucomicrobia phyla during composting shifted the microbial composition. Moreover, canonical correspondence analysis showed trace elements explaining 90% variations in ARGs abundance. The study illustrates significance of post-digestate composting in mitigating ARGs release, and effectiveness could be linked to shift in microbial composition and trace elements release.
- Subjects :
- Environmental Engineering
biology
Renewable Energy, Sustainability and the Environment
Firmicutes
Chemistry
Composting
fungi
Planctomycetes
Verrucomicrobia
Bacteroidetes
Bioengineering
General Medicine
biology.organism_classification
complex mixtures
Actinobacteria
Anti-Bacterial Agents
Manure
Genes, Bacterial
Digestate
Drug Resistance, Bacterial
Food science
Proteobacteria
Waste Management and Disposal
Poultry litter
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 340
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....3a3e9da8e76b8ca64e25ea0f6ba8c45b