期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 23, 期 19, 页码 19495-19503出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-016-7048-8
关键词
Antibiotic-resistant bacteria; Antibiotic resistance genes; Reduction; Biological treatment process; Municipal wastewater; Redundancy analysis
资金
- National Natural Science Foundation of China [51308399]
- Shanghai Natural Science Foundation [13ZR1443300]
Wastewater treatment plants are hot spots for antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs). However, limited studies have been conducted to compare the reductions of ARB and ARGs by various biological treatment processes. The study explored the reductions of heterotrophic bacteria resistant to six groups of antibiotics (vancomycin, gentamicin, erythromycin, cephalexin, tetracycline, and sulfadiazine) and corresponding resistance genes (vanA, aacC1, ereA, ampC, tetA, and sulI) by five bench-scale biological reactors. Results demonstrated that membrane bioreactor (MBR) and sequencing batch reactor (SBR) significantly reduced ARB abundances in the ranges of 2.80 similar to 3.54 log and 2.70 similar to 3.13 log, respectively, followed by activated sludge (AS). Biological filter (BF) and anaerobic (upflow anaerobic sludge blanket, UASB) techniques led to relatively low reductions. In contrast, ARGs were not equally reduced as ARB. AS and SBR also showed significant potentials on ARGs reduction, whilst MBR and UASB could not reduce ARGs effectively. Redundancy analysis implied that the purification of wastewater quality parameters (COD, NH4+-N, and turbidity) performed a positive correlation to ARB and ARGs reductions.
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