The maturity period is the main stage of antibiotic resistance genes reduction in aerobic composting process of swine manure in sub-scale farms

Wei Guo; Caihong Huang; Beidou Xi; Zhurui Tang; Wenbing Tan; Wenxuan Li; Ying Zhang; Wei Li

doi:10.1016/j.biortech.2020.124139

The maturity period is the main stage of antibiotic resistance genes reduction in aerobic composting process of swine manure in sub-scale farms

Bioresour Technol. 2021 Jan:319:124139. doi: 10.1016/j.biortech.2020.124139. Epub 2020 Sep 17.

Authors

Wei Guo¹, Caihong Huang², Beidou Xi³, Zhurui Tang⁴, Wenbing Tan¹, Wenxuan Li⁵, Ying Zhang¹, Wei Li¹

Affiliations

¹ State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
² State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: huangch@craes.org.cn.
³ State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
⁴ State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China.
⁵ Department of Civil & Environmental Engineering, National University of Singapore, Singapore 117576, Republic of Singapore.

PMID: 32971337
DOI: 10.1016/j.biortech.2020.124139

Abstract

This study was focused on the changes of antibiotic resistance genes (ARGs) and their potential host bacteria during the swine manure composting on sub-scale farms. Eight target ARGs increased 427% on average, with a trend of increase at early stage and decrease at later stage, and the main reduction stage appeared in maturity stage. The abundance of ARGs was mainly affected by the community succession of potential host bacteria. Composting could reduce the abundance of potential host bacteria of ARGs as well as pathogens such as Pseudomonas, and reduce the environmental risks of swine manure. N/C and S levels had a positive effect on the potential host of most ARGs. Prolonging the maturity period would inhibit the growth of potential host bacteria of ARGs during composting, therefore inhibiting the transmission of ARGs.

Keywords: Antibiotic resistance genes; Manure composting; Potential host bacteria; Sub-scale farm.

MeSH terms

Animals
Anti-Bacterial Agents / pharmacology
Composting*
Drug Resistance, Microbial / genetics
Farms
Genes, Bacterial / genetics
Manure
Swine

Substances

Anti-Bacterial Agents
Manure