Reduction of antibiotic resistome in influent of a wastewater treatment plant (WWTP) via a chemically enhanced primary treatment (CEPT) process

被引：0

作者：

Shin, Jingyeong ^{[1
]}

Choi, Sangki ^{[2
]}

Park, Chang Min ^{[3
]}

Wang, Jinhua ^{[4
]}

Kim, Young Mo ^{[1
]}

机构：

[1] Department of Civil and Environmental Engineering, Hanyang University, Seongdong-gu, Seoul,04763, Korea, Republic of

[2] School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Buk-gu, Gwangju,61005, Korea, Republic of

[3] Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu,41566, Korea, Republic of

[4] Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, Tai'an,271018, China

来源：

Chemosphere | 2022年 / 286卷

基金：

新加坡国家研究基金会;

关键词：

Sewage pumping plants - Coagulation - Reclamation - Chlorine compounds - Wastewater treatment - Antibiotics - Gene transfer - Water treatment plants - Iron compounds - Genes;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Chemically enhanced primary treatment (CEPT) has been considered for maximizing wastewater energy recovery by enhancing the carbon captured through the primary treatment. However, evaluating the potential of CEPT as a primary treatment process for removing antibiotic resistance genes (ARGs) in the influent from a wastewater treatment plant (WWTP) has seldom been investigated. In this study, CEPT was conducted to assess simultaneous reduction of 13 major targeted ARGs and common pollutants in wastewater compared with primary sedimentation alone (non-CEPT). CEPT processes using three types of coagulants (PACl, FeCl3 and alum) effectively reduced absolute abundance of ARGs and intI1 in the influent from municipal WWTP. Average log-removal of absolute abundance of ARGs was achieved up to 1.77 ± 0.41 along with 90% turbidity reduction compared to non-CEPT. Through the simultaneous reduction of ARGs and intI1 genes during a CEPT process, ARGs proliferation may be limited directly through reduction of antibiotic resistant bacteria or indirectly through decreasing the possibility of horizontal gene transfer by intI1 removal. Reduction of ARGs and intI1 was improved by increasing coagulants’ doses: abundances of residual ARGs under optimal dose conditions were similar, regardless of the different characteristics of coagulant types. The strongly positive correlation between reduction of turbidity/total phosphorus (T-P) and ARGs was explored, identifying that turbidity or T-P might be suitable indicators linked with variations in the abundance of ARGs during CEPT. As a result, CEPT may prove promising in efforts to control ARGs flowing into a WWTP. © 2021 Elsevier Ltd

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