Degradation performance and microbial community analysis of microbial electrolysis cells for erythromycin wastewater treatment
| Autor: | Haonan Wang, Fengxiang Li, Tao Hua, Brim Stevy Ondon, Shengnan Li, Yanwanjing Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences Environmental Engineering biology Chemistry Biomedical Engineering Biofilm Bioengineering Biodegradation biology.organism_classification 01 natural sciences 03 medical and health sciences Wastewater Microbial population biology 010608 biotechnology Sewage treatment Food science Effluent Bacteria 030304 developmental biology Biotechnology Geobacter |
| Zdroj: | Biochemical Engineering Journal. 146:1-9 |
| ISSN: | 1369-703X |
| Popis: | Antibiotics represent a major environmental health concern worldwide. In this study, a high concentration of erythromycin (ERY) was degraded by using single-chamber MECs with carbon cloth anodes. The electrochemical characteristics of MECs and the correlation with ERY were analysed. High-performance liquid chromatography analysis showed that the removal of ERY reached 99% when the influent concentration of ERY was 20 mg/L. In addition, ermG was the most common antibiotic resistance gene, whether in the reactor effluent (3.37×105 copies/μL DNA) or in the anode biofilm (0.21×105 copies/μL DNA), while ermA was not detected. The SEM images indicated that the anodic and cathodic biofilm were mature and well-constructed. High throughput sequencing of 16S rDNA gene amplicons indicated that Geobacter, as a known genus of exoelectrogenic bacteria, is very dominant in the reactor anode biofilm, with a relative abundance of 77.0%. Acetoanaerobium was widely present in the biocathode. These results indicate that MECs can be considered to be a useful and reliable technology for improving ERY biodegradation efficiency in wastewater, thus providing a meaningful economic output and efficient operation in future scale-ups. |
| Databáze: | OpenAIRE |
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