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Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting
Zhang, Junya; Chen, Meixue; Sui, Qianwen; Tong, Juan; Jiang, Chao; Lu, Xueting; Zhang, Yuxiu; Wei, Yuansong
2016-03-15
Source PublicationWATER RESEARCH
Volume91Issue:0Pages:339-349
AbstractComposting is commonly used for the treatment and resource utilization of sewage sludge, and natural zeolite and nitrification inhibitors can be used for nitrogen conservation during sludge composting, while their impacts on ARGs control are still unclear. Therefore, three lab-scale composting reactors, A (the control), B (natural zeolite addition) and C (nitrification inhibitor addition of 3,4-dimethylpyrazole phosphate, DMPP), were established. The impacts of natural zeolite and DMPP on the levels of ARGs were investigated, as were the roles that heavy metals, mobile genetic elements (MGEs) and the bacterial community play in ARGs evolution. The results showed that total ARGs copies were enriched 2.04 and 1.95 times in reactors A and C, respectively, but were reduced by 1.5% in reactor B due to the reduction of conjugation and co-selection of heavy metals caused by natural zeolite. Although some ARGs (bla(CTX-M), bla(TEM), ermB, ereA and tetW) were reduced by 03-2 logs, others (ermF, sull, sulll, tetG, tetX, mefA and aac(6'-1b-cr) increased by 0.3-1.3 logs after sludge composting. Although the contributors for the ARGs profiles in different stages were quite different, the results of a partial redundancy analysis, Mantel test and Procrustes analysis showed that the bacterial community was the main contributor to the changes in ARGs compared to MGEs and heavy metals. Network analysis determined the potential host bacteria for various ARGs and further confirmed our results. (C) 2016 Elsevier Ltd. All rights reserved.
Department大气污染控制中心
KeywordAntibiotic Resistance Genes Sludge Composting Natural Zeolite Bacterial Community 3 4-dimethylpyrazole Phosphate (Dmpp)
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/35755
Collection大气环境与污染控制实验室
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Zhang, Junya,Chen, Meixue,Sui, Qianwen,et al. Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting[J]. WATER RESEARCH,2016,91(0):339-349.
APA Zhang, Junya.,Chen, Meixue.,Sui, Qianwen.,Tong, Juan.,Jiang, Chao.,...&Wei, Yuansong.(2016).Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting.WATER RESEARCH,91(0),339-349.
MLA Zhang, Junya,et al."Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting".WATER RESEARCH 91.0(2016):339-349.
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