Hyperthermophilic Composting Accelerates the Removal of Antibiotic Resistance Genes and Mobile Genetic Elements in Sewage Sludge 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Environmental Science & Technology: ES&T
年/卷/期
2018 / 52 / 1
页码
266-276
ISSN号
0013-936X
作者单位
Nanjing Agr Univ, Jiangsu Prov Key Lab Organ Solid Waste Utilizat, Nanjing 210095, Jiangsu, Peoples R China;Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China;Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China;Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China;Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China;Fujian Agr & Forestry Univ, Coll Resources & Environm, Inst Environm Microbiol, Fuzhou 350002, Fujian, Peoples R China;Univ York, Dept Biol, Wentworth Way, York YO10 5DD, N Yorkshire, England;Netherlands Inst Ecol, Dept Terr Ecol, NL-6700 Wageningen, Netherlands;Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Fujian, Peoples R China;Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut C, Guangzhou 510650, Guangdong, Peoples R China;
作者
Wei, Zhong;Zhou, Shungui;Zhu, Yongguan;Liao, Hanpeng;Lu, Xiaomei;Rensing, Christopher;Friman, Ville Petri;Geisen, Stefan;Chen, Zhi;Yu, Zhen;
摘要
Composting is an efficient way to convert organic waste into fertilizers. However, waste materials often contain large amounts of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) that can reduce the efficacy of antibiotic treatments when transmitted to humans. Because conventional composting often fails to remove these compounds, we evaluated if hyperthermophilic composting with elevated temperature is more efficient at removing ARGs and MGEs and explored the underlying mechanisms of ARG removal of the two composting methods. We found that hyperthermophilic composting removed ARGs and MGEs more efficiently than conventional composting (89% and 49%, respectively). Furthermore, the half-lives of ARGs and MGEs were lower in hyperthermophilic compositing compared to conventional composting (67% and 58%, respectively). More-efficient removal of ARGs and MGEs was associated with a higher reduction in bacterial abundance and diversity of potential ARG hosts. Partial least-squares path modeling suggested that reduction of MGEs played a key role in ARG removal in hyperthermophilic composting, while ARG reduction was mainly driven by changes in bacterial community composition under conventional composting. Together these results suggest that hyperthermophilic composting can significantly enhance the removal of ARGs and MGEs and that the mechanisms of ARG and MGE removal can depend on composting temperature.
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