کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
146388 456369 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of the amoxicillin concentration on organics removal and microbial community structure in an anaerobic EGSB reactor treating with antibiotic wastewater
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Influence of the amoxicillin concentration on organics removal and microbial community structure in an anaerobic EGSB reactor treating with antibiotic wastewater
چکیده انگلیسی


• 85% and 80% removal of COD and AMX were achieved in the reactor.
• Increasing amoxicillin had relatively minor influence on COD removal efficiency.
• Increasing amoxicillin had remarkably changed the community structure of bacteria.
• Methanosaeta was the main compositions of achaea community in the reactor.

In order to investigate the organics removal and microbial community dynamics in accordance with variable amoxicillin (AMX) concentrations, a 1.47 L expanded granular sludge bed (EGSB) reactor was designed and operated for 241 days treating with artificial antibiotic wastewater. Furthermore, microbiological community dynamics with increasing AMX concentrations were also investigated using clone libraries and the terminal restriction fragment length polymorphism (T-RFLP) of PCR-amplified 16S rRNA gene. AMX concentration in the reactor was controlled at 19.2 mg L−1 at first and then gradually increased to around 241.7 mg L−1 from the day 146 to 241. COD and AMX removal efficiencies reached to 85% and 80%, respectively. And T-RFLP results showed that the microbial community structure in the reactor changed with the increased AMX concentrations. Especially for bacteria, T-RFs of 486, 482, 166, 160 and 88 bp were dominant at all stages, whereas abundance of T-RFs 91, 163 and 170 bp showed remarkable changes. Besides, clone results combined with T-RFLP showed Firmicutes, Bacteroidetes, Cloacimonetes, Ignavibacteriae and Thermotogae were most dominant bacterial groups in the system and some geneses were also expected to be responsible for the degradation of AMX. For achaea, its community structure (T-RFs of 96, 122 bp) kept stable in all the stages.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 274, 15 August 2015, Pages 94–101
نویسندگان
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