Degradation of oxytetracycline under autotrophic nitrifying conditions in a membrane aerated biofilm reactor and community fingerprinting

  • J Hazard Mater. 2018 Aug 15;356:26-33. doi: 10.1016/j.jhazmat.2018.05.040.
Aytekin Çelik  1 ,  Eoin Casey  2 ,  Halil Hasar  3
Affiliations
  • 1. Fırat University, Faculty of Engineering, Department of Environmental Engineering, 23119 Elazığ, Turkey.
  • 2. University College Dublin, School of Chemical & Bioprocess Engineering, Dublin, Ireland.
  • 3. Fırat University, Faculty of Engineering, Department of Environmental Engineering, 23119 Elazığ, Turkey. Electronic address: [email protected].
PMID: 29803031 DOI: 10.1016/j.jhazmat.2018.05.040
Abstract

Pharmaceuticals in waterbodies are a growing concern due to their extensive uses and adverse effects on aquatic life. Oxytetracycline (OTC) is one of Tetracycline antibiotic group used for treatment of Animals and humans. This study evaluates the simultaneous oxidation of OTC and ammonium under autotrophic nitrifying conditions by using a membrane aerated biofilm reactor (MABR) as it provides an appropriate environment for the antibiotic-degrading bacteria. The results showed that MABR achieved fluxes of 1.62 mg OTC/m2.d and 1117 mg N/m2.d while the fluxes of O2 (JOTC-O2) utilized for OTC and NH4-N (JNH4-N-O2) oxidation were calculated to be 2.94 and 5105 mg O2/m2.d, respectively. Three transformation products, 4-Epi-OTC, α-Apo-OTC and β-Apo-OTC, were identified and measured at ppb levels. The biofilm community comprised of Bacteria environmental samples, b-proteobacteria, CFB group bacteria, g-proteobacteria, d-proteobacteria and a-proteobacteria.

Keywords
Membrane aerated biofilm reactor; Molecular diversity; OTC degradation; Transformation products.
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