期刊
BIORESOURCE TECHNOLOGY
卷 249, 期 -, 页码 916-923出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.11.006
关键词
Divalent copper; Tetracycline; Combined effects; Microbial activity; Microbial community
资金
- National Natural Science Foundation of China [51708079, 51178437]
- Doctoral Scientific Research Foundation of Liaoning Province Science and Technology Department, China [201601303]
- Scientific Research Foundation of Liaoning Province Education Department, China [L2015028]
- Undergraduate Innovative Training Program of Liaoning Province, China [201711258000031]
The long-term effects of combined divalent copper (Cu(II)) and tetracycline (TC) on the performance, microbial activity and community in a sequencing batch reactor (SBR) were investigated. The addition of Cu(II), TC or mixed Cu(II)/TC caused the decrease of the organics and nitrogen removal efficiencies, and their decreased degrees were the lowest at the addition of mixed Cu(II)/TC. The increase of mixed Cu(II)/TC concentrations in the influent did not change the antagonistic effects between Cu(II) and TC on nitrifying and denitrifying activities. Nitrifiers had higher tolerances to Cu(II), TC and mixed Cu(II)/TC than denitrifiers. Compared to the addition of Cu(II) or TC alone, the microbial community richness was higher at the addition of mixed Cu(II)/TC, while the microbial community diversity was lower. The increased protein (PN) in extracellular polymeric substances (EPS) was a protective response of bacteria to Cu(II), TC and mixed Cu(II)/TC.
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