Antibiotic resistant bacteria in urban sewage: Role of full-scale wastewater treatment plants on environmental spreading

Chemosphere
A TurollaM Antonelli

Abstract

The presence of antibiotic resistant bacteria (ARB) in wastewater was investigated and the role of wastewater treatment plants (WWTPs) in promoting or limiting antibiotic resistance was assessed. Escherichia coli (E. coli) and total heterotrophic bacteria (THB) resistance to ampicillin, chloramphenicol and tetracycline was monitored in three WWTPs located in Milan urban area (Italy), differing among them for the operating parameters of biological process, for the disinfection processes (based on sodium hypochlorite, UV radiation, peracetic acid) and for the discharge limits to be met. Wastewater was collected from three sampling points along the treatment sequence (WWTP influent, effluent from sand filtration, WWTP effluent). Antibiotic resistance to ampicillin was observed both for E. coli and for THB. Ampicillin resistant bacteria in the WWTP influents were 20-47% of E. coli and 16-25% of THB counts. A limited resistance to chloramphenicol was observed only for E. coli, while neither for E. coli nor for THB tetracycline resistance was observed. The biological treatment and sand filtration led to a decrease in the maximum percentage of ampicillin-resistant bacteria (20-29% for E. coli, 11-21% for THB). However, the conventiona...Continue Reading

Citations

Mar 14, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Tamiris ChahmClovis Antonio Rodrigues
May 3, 2019·Environmental Science and Pollution Research International·Kristína LépesováLucia Birošová
Jun 14, 2018·International Journal of Environmental Research and Public Health·Aboi IgwaranAnthony Ifeanyi Okoh
Jan 13, 2021·The Science of the Total Environment·Ilaria ZarrellaAntonio Proto
Oct 26, 2020·Environmental Science and Pollution Research International·Sakina BombaywalaHemant J Purohit
Nov 23, 2019·Water Research·Nicoletta MakowskaJoanna Mokracka
Oct 6, 2018·The Science of the Total Environment·Maria Alexandra BighiuJakob Ottoson
Jul 27, 2021·The Science of the Total Environment·Concetta PirontiGianluigi Franci
Jan 18, 2022·Environmental Science and Pollution Research International·Arkadeep Mukherjee, Young-Ho Ahn

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