Fate and driving factors of antibiotic resistance genes in an integrated swine wastewater treatment system: From wastewater to soil
文献类型： 外文期刊
作者： Zhu, Ning 1 ; Jin, Hongmei 1 ; Ye, Xiaomei 1 ; Liu, Wei 1 ; Li, Danyang 1 ; Shah, Ghulam Mustafa 4 ; Zhu, Yanyun 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Recycling Agr Res Ctr, Nanjing 210014, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Crop & Anim Integrated Farming, Nanjing 210014, Peoples R China
3.Minist Agr & Rural Affairs, East China Sci Observing & Expt Stn Dev & Utiliza, Nanjing 210014, Peoples R China
4.COMSATS Univ Islamabad, Dept Environm Sci, Vehari Campus, Vehari 61100, Pakistan
关键词： Antibiotic resistance genes; Wastewater treatment; Bacterial community; Mobile genetic element; Soil
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）
ISSN： 0048-9697
年卷期： 2020 年 721 卷
页码：
收录情况： SCI
摘要： Swine wastewater (SW) represents an important source of antibiotic resistance genes (ARGs) in the environment. However, few studies have assessed the occurrence and removal of ARGs in the whole wastewater treatment process followed by its farmland application. This study investigated the ARGs profiles in an integrated SW treatment system and its receiving soil, as well as their relationships with SW parameters and bacterial communities. Results revealed that sulfonamide, tetracycline and aminoglycoside resistance genes were dominant in SW. The relative abundance of total ARGs in SW was reduced by 84% after the treatments. Among the SW treatment units, anaerobic digestion, primary sedimentation and constructed wetland contributed to ARGs removal while secondary sedimentation increased the total ARGs abundance. Farmland irrigation of the treated SW resulted in enrichment of persistent ARGs in the receiving soil, which might be attributed to the propagation of potential bacterial hosts and high horizontal gene transferability. Redundancy analysis indicated that the relative abundance of total ARGs was significantly correlated with total nitrogen, total phosphorus, antibiotics and bacterial communities. The shift in bacterial community was the major driving factor for ARGs alteration during SW treatment process. Our results highlight the effect of treated SW irrigation on the antibiotic resistome in agricultural environment, and can contribute in improving SW treatment system for better antibiotic resistance control. (C) 2020 Elsevier B.V. All rights reserved.
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