期刊
BIORESOURCE TECHNOLOGY
卷 281, 期 -, 页码 326-334出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.02.112
关键词
Triclosan; Partial denitrification; Sequencing moving bed biofilm reactor; Bacterial community; Antibiotic resistance genes
资金
- National Natural Science Foundation of China [51578015]
- National Science and Technology Major Project [2017ZX07103-003]
- Beijing Municipal Science and Technology Project [Z181100005518002]
Effects of triclosan (TCS) on performance, microbial community and antibiotic resistance genes (ARGs) during partial denitrification (PD) were investigated in a sequencing moving bed biofilm reactor (SMBBR). TCS inhibited nitrite accumulation; inhibition effect was more obvious as TCS concentration increased from 1 to 5 mg/L, but it could recover. Extracellular polymeric substances contents increased with 1 mg/L TCS addition and decreased a lot at 5 mg/L TCS. Community structure in biofilm was different from that in floccular sludge, but it was similar at 5 mg/L TCS. Illumina sequencing showed that Pseudomonas, Aeromonas, Shewanella and Thauera became dominant genera. Abundance of nirS was stable and higher than that of narG and nosZ. High-throughput qPCR showed that mexF, acrA-02, fabK, etc. were screened at 5 mg/L TCS. IntI1 and tnpA-04 were abundant mobile genetic elements. The study furthers understanding of effects of TCS on PD, bacterial communities and ARGs in SMBBR.
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