Biodegradation of tetracycline antibiotics in A/O moving-bed biofilm reactor systems
Autor: | Yong-De Liu, Bin Dong, Han-Yu Chen |
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Rok vydání: | 2017 |
Předmět: |
Chlortetracycline
medicine.drug_class Tetracycline Tetracycline antibiotics 0211 other engineering and technologies Bioengineering 02 engineering and technology Oxytetracycline 010501 environmental sciences Biology Wastewater 01 natural sciences Microbiology Water Purification Bioreactors medicine 0105 earth and related environmental sciences 021110 strategic defence & security studies Moving bed biofilm reactor Biofilm General Medicine Biodegradation Anti-Bacterial Agents Activated sludge Biofilms Biotechnology medicine.drug Nuclear chemistry |
Zdroj: | Bioprocess and biosystems engineering. 41(1) |
ISSN: | 1615-7605 |
Popis: | An anaerobic/aerobic moving-bed biofilm (A/O-MBBR) reactor system was constructed, and the treatment efficiency of aqueous antibiotics in wastewater was investigated. The effects of antibiotics on the microbial communities in the A/O-MBBR were also investigated. Under the optimized reaction conditions, removal of tetracycline antibiotics (TCs) was studied in a series of experiments. When a low concentration of tetracycline (TC) was added to the reactor system, high removal efficiency of conventional pollutants (TC concentration decreased from 10 turn to 2.8 μg L−1) was achieved. When mixed TCs (50 μg L−1) were added to the system, the removal efficiencies of chlortetracycline (CTC), TC and oxytetracycline (OTC) reached 52.03, 41.79, and 38.42%, respectively. TC degradation was decreased to 21.16% when the antibiotic concentration was 500 μg L−1; exposure to this TC concentration destroyed the community structure of the activated sludge bacteria in the reactor. The products of the biodegradation analysis revealed the possible degradation pathways functioning in the experimental A/O-MBBRs. |
Databáze: | OpenAIRE |
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