Journal
BIORESOURCE TECHNOLOGY
Volume 261, Issue -, Pages 249-256Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.04.008
Keywords
Gentamicin; Antibiotic resistance genes; Composting; Bacterial diversity; Mobile genetic elements
Funding
- National Key Technology R&D Program of China [2017YFD0801304]
- National Natural Science Foundation of China [31572209]
- Natural Science Foundation of Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences [1610132016013]
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Dynamics in bacterial community composition, along with 13 antibiotic resistance genes (ARGs) and eight mobile genetic elements (MGEs), were assessed during co-composting with gentamicin and lovastatin fermentation residue (GFR and LFR, respectively). Using next generation sequencing, the key bacterial taxa associated with the different stages of composting were identified. Most importantly, Bacillus, belonging to Phylum Firmicutes, was associated with enhanced degradation of gentamicin, decomposition of organic matter (OM) and dissolved organic carbon (DOC), and also extension of the thermophilic phase of the composting cycle. During the course of composting, the patterns of different ARGs/MGEs varied. However, the total and the normalized (to bacterial numbers) copies both remained high. The abundance of various ARGs was related to bacterial abundance and community composition, and the changing pattern of individual ARGs was influenced by the selectivity of MGEs and bacteria.
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