Effect of sulfamethoxazole and oxytetracycline on enhanced biological phosphorus removal and bacterial community structure

被引：20
作者：
Long, Sha [1 ,2 ]
Yang, Yongkui [1 ]
Pavlostathis, Spyros G. [2 ]
Zhao, Lin [1 ]
机构：
[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
[2] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 319卷
基金：
中国国家自然科学基金;
关键词：
Enhanced biological phosphorus removal; Oxytetracycline; Sulfamethoxazole; Antibiotic resistance genes; Bacterial community structure; ANTIBIOTIC-RESISTANCE GENES; WATER TREATMENT PLANTS; ACTIVATED-SLUDGE; MICROBIAL COMMUNITY; WASTE-WATER; TETRACYCLINE; SULFONAMIDE; ACCUMULIBACTER; NITROGEN; SYSTEM;
D O I：
10.1016/j.biortech.2020.124067
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The individual and combined effects of sulfamethoxazole (SMX) and oxytetracycline (OTC) on an enhanced biological phosphorus removal (EBPR) system was investigated. OTC at 5 mg/L resulted in filamentous bulking with a collapse of EBPR system. P removal decreased to 44.8% and COD was mostly removed during the aerobic phase. SMX and OTC had antagonistic effects in EBPR system. The inhibitory effect of SMX and SMX + OTC on P removal, COD removal, glycogen transformation and extracellular polymeric substances content was reversible with prolonged operation, accompanied with increase of polyphosphate accumulating organisms. The presence of nitrification inhibitor allylthiourea, high pH and low tetX abundance limited the removal of SMX and OTC. The bacterial community structure, antibiotic resistance genes abundances and genes functions were also investigated by metagenomic analysis. The results of this study offer insights into the individual and combined environmental risks of SMX and OTC, and their impact on EBPR.
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页数：12
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