» Articles » PMID: 35007308

Effect of Tetracycline on Nitrogen Removal in Moving Bed Biofilm Reactor (MBBR) System

Overview
Journal PLoS One
Date 2022 Jan 10
PMID 35007308
Authors
Affiliations
Soon will be listed here.
Abstract

The effect of tetracycline (TC) on nitrogen removal in wastewater treatment plants has become a new problem. This study investigated the effects of TC on nitrogen removal using a Moving Bed Biofilm Reactor system. The results showed that there was no significant effect on nitrogen removal performance when the concentration of TC was 5 mg/L, and that the total nitrogen (TN) removal efficiency could reach 75-77%. However, when the concentration of TC increased to 10 mg/L, the denitrification performance was affected and the TN removal efficiency decreased to 58%. The abundance of denitrifying bacteria such as those in the genus Thauera decreased, and TC-resistant bacteria gradually became dominant. At a TC concentration of 10 mg/L, there were also increases and decreases, respectively, in the abundance of resistance and denitrification functional genes. The inhibitory effect of TC on denitrification was achieved mainly by the inhibition of nitrite-reducing bacteria.

References
1.
Ge S, Wang S, Yang X, Qiu S, Li B, Peng Y . Detection of nitrifiers and evaluation of partial nitrification for wastewater treatment: A review. Chemosphere. 2015; 140:85-98. DOI: 10.1016/j.chemosphere.2015.02.004. View

2.
Chen J, Hu Y, Huang W, Liu Y, Tang M, Zhang L . Biodegradation of oxytetracycline and electricity generation in microbial fuel cell with in situ dual graphene modified bioelectrode. Bioresour Technol. 2018; 270:482-488. DOI: 10.1016/j.biortech.2018.09.060. View

3.
Zhang Y, Pei M, Zhang B, He Y, Zhong Y . Changes of antibiotic resistance genes and bacterial communities in the advanced biological wastewater treatment system under low selective pressure of tetracycline. Water Res. 2021; 207:117834. DOI: 10.1016/j.watres.2021.117834. View

4.
Michael I, Rizzo L, McArdell C, Manaia C, Merlin C, Schwartz T . Urban wastewater treatment plants as hotspots for the release of antibiotics in the environment: a review. Water Res. 2012; 47(3):957-95. DOI: 10.1016/j.watres.2012.11.027. View

5.
Nzoughet J, Grant I, Prodohl P, Hamilton J, Botana L, Elliott C . Evidence of Methylobacterium spp. and Hyphomicrobium sp. in azaspiracid toxin contaminated mussel tissues and assessment of the effect of azaspiracid on their growth. Toxicon. 2011; 58(8):619-22. DOI: 10.1016/j.toxicon.2011.09.012. View