Effect of tetracycline on microbial community structure associated with enhanced biological N&P removal in sequencing batch reactor

Bioresource Technology
Hang LiuYu Liu

Abstract

The presence of antibiotics in wastewater has raised serious concerns about its potential impacts on biological nitrogen and phosphorus (N&P) removal. This study investigated the long-term process performance and microbial structures in response to tetracycline in the enhanced N&P removal process. Results showed that trace tetracycline (20 and 50 μg/L) had no obvious effect on the N&P removal, while the relative abundances of Nitrospira and poly-phosphate accumulating organisms (PAOs) were found to increase. Moreover, the decreased abundance of ammonia oxidizing bacteria (AOB) was observed. When the tetracycline concentrations were further increased to 2 and 5 mg/L, initially the N&P removal was seriously inhibited, but gradually recovered with the restored abundances of Nitrospira and PAOs. However, AOB, Nitrobacter and denitrifiers were found to be more vulnerable to high-concentration tetracycline with slow activity recovery. Consequently, this study offered useful information about long-term microbial responses to tetracycline in enhanced biological nutrient removal process.

Citations

Aug 12, 2020·Critical Reviews in Biotechnology·Sicheng Shao, Xiangwei Wu
Sep 15, 2020·World Journal of Microbiology & Biotechnology·Shivani ShuklaRanjana Bhatia
Dec 15, 2020·The Science of the Total Environment·Quan LiaoRandeng Wang
Feb 22, 2021·The Science of the Total Environment·Ligui WuXiaoming Zou

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