Abstract:
:The distribution of antibiotic resistance genes (ARGs) has been intensively studied in large-scale wastewater treatment plants and livestock sources. However, small-scale decentralized sewage treatment facilities must also be explored due to their possible direct exposure to residents. In this study, six wastewater treatment facilities in developed rural areas in eastern China were investigated to understand their risks of spreading ARGs. Using metagenomics and network analysis tools, ARGs and bacterial and viral communities were identified in the influent (INF) and effluent (EFF) samples. The dominant ARGs belonged to the bacitracin class, which are different from most of municipal wastewater treatment plants (WWTPs). The dominant hosts of ARGs are Acidovorax in bacterial communities and Prymnesiovirus in viral communities. Furthermore, a positive relationship was found between ARGs and phages. The ARGs significantly correlated with phages were all hosted by specific genera of bacteria, indicating that phages had contributed to the ARG's proliferation in sewage treatment facilities. Paying significant concern on the possible enhanced risks caused by bacteria, viruses and their related ARGs in decentralized sewage treatment facilities is necessary. Electronic Supplementary Material:Supplementary material is available in the online version of this article at 10.1007/s11783-021-1469-4 and is accessible for authorized users.
journal_name
Front Environ Sci Engjournal_title
Frontiers of environmental science & engineeringauthors
Zhao J,Li B,Lv P,Hou J,Qiu Y,Huang Xdoi
10.1007/s11783-021-1469-4keywords:
["Antibiotic resistance genes","Decentralized sewage treatment facilities","Metagenomics","Network analysis","Virus"]subject
Has Abstractpub_date
2022-01-01 00:00:00pages
35issue
3eissn
2095-2201issn
2095-221Xpii
1469journal_volume
16pub_type
杂志文章abstract::Periodic chemical cleaning with sodium hypochlorite (NaClO) is essential to restore the membrane permeability in a membrane bioreactor (MBR). However, the chlorination of membrane foulants results in the formation of disinfection by-products (DBPs), which will cause the deterioration of the MBR effluent and increase t...
journal_title:Frontiers of environmental science & engineering
pub_type: 杂志文章
doi:10.1007/s11783-021-1389-3
更新日期:2021-01-01 00:00:00