Removal of Antibiotic Resistance From Municipal Secondary Effluents by Ozone-Activated Carbon Filtration
نویسندگان
چکیده
At wastewater treatment plants (WWTPs), additional steps are introduced for removal of organic micropollutants (OMPs) from the treated effluents, especially pharmaceutical residues. same time, a new concern is emerging: antibiotic resistance (AR). This research studied effect ozonation, coagulation and granular activated carbon (GAC) filtration applied as tertiary OMPs nutrients, on AR removal. Bacterial culture methods in selective media were used to screen four different microorganisms: two faecal indicators ( Escherichia coli Enterococci) sensitive bacteria (ASB), resistant strain each these bacteria, namely Extended-Spectrum Beta-lactamase producing E. (ESBL- E.coli ) Vancomycin Resistant Enterococci (VRE) (ARB). laboratory scale, ozonation experiments (ozone dose 0.4–0.6 g O 3 /g DOC) using Polyaluminum chloride (PAX-214) FeCl (coagulant 0.004–1 mM/L) performed secondary effluent municipal WWTPs. In addition pilot plant full-scale 0.4 GAC (empty bed contact time 15 min) No significant differences found between ARB ASB which could indicate that can be an initial proxy technologies. experiments, showed good both ASB. However, doses needed reach 2–3 log factor 2.5–4 (ozonation) 250 (coagulation) higher than OMP (by ozonation) phosphorus (P) coagulation). filters, risk enhancement occurred, filters with matured biology. Although not necessarily directly harmful, they pass down their pathogenic via horizontal gene transfer.
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ژورنال
عنوان ژورنال: Frontiers in Environmental Science
سال: 2022
ISSN: ['2296-665X']
DOI: https://doi.org/10.3389/fenvs.2022.834577