四环素
造粒
胞外聚合物
化学
废水
细菌
微生物学
污水处理
四环素类抗生素
抗生素
食品科学
制浆造纸工业
生物
生物化学
废物管理
材料科学
复合材料
遗传学
工程类
生物膜
作者
Lilong Yan,Wanting Chen,Caixu Wang,Shuang Liu,Cong Liu,Liquan Yu,Yaoqi Zheng,Jishuang Jiang,Yaoli Zhang,Changlei Xia,Su Shiung Lam
出处
期刊:Chemosphere
[Elsevier]
日期:2022-02-01
卷期号:288: 132510-132510
被引量:52
标识
DOI:10.1016/j.chemosphere.2021.132510
摘要
Tetracycline is a potentially hazardous residual antibiotic detected in various sewages. High concentration (mg/L) of tetracycline is found in pharmaceutical/hospital wastewater and wastewater derived from livestock and poultry. So far, only antibiotics in μg/L level have been reported in granulation of aerobic sludge during wastewater treatment, but its effects in high concentration are rarely reported. In this study, the influence of tetracycline in high concentration (∼2 mg/L) on the formation of granular sludge, structure, and metabolic function of the microbial community during the granulation of aerobic sludge was investigated to improve the understanding of the aerobic granular sludge formation under high-level of tetracycline. The role of extracellular polymers substances (EPSs) derived from granular sludge in the granulation and tetracycline removal process was also investigated, showing that tetracycline improved the relative hydrophobicity, flocculability and protein/polysaccharide ratio of EPSs, accelerating the granulation of sludge. Succession of microbial communities occurred during the domestication of functional bacteria present in the sludge and was accompanied with regulation of metabolic function. The addition of tetracycline lead to an increase of tetracycline-degrading bacteria or antibiotic resistance genus. Those findings provide new perspectives of the influence of tetracycline on aerobic sludge granulation and the removal mechanism of tetracycline.
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