Removal of Antibiotics During In-situ Sludge Ozone-reduction Process

• Published in: Huanjing kexue Vol. 39; no. 4; p. 1739
• Main Authors: Wang, Lu, Ben, Wei-Wei, Li, Yan-Gang, Qiang, Zhi-Min
• Format: Journal Article
• Language: Chinese
• Published: China 08.04.2018
• Subjects: Ammonia; Anti-Bacterial Agents - isolation & purification; Bioreactors; Nitrogen; Oxygen; Ozone - chemistry; Phosphorus; Sewage; Waste Disposal, Fluid - methods; phosphorus recovery; activated sludge process; antibiotics; ozone; in-situ sludge reduction
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.201708229

Two sequencing batch reactors were established at bench-scale, with one used as an in-situ sludge ozone-reduction system and the other as a control system. Both systems were continuously operated for 90 days to comparatively investigate the elimination of nine typical antibiotics (i.e., tetracycline, oxytetracycline, doxytetracycline, norfloxacin, ofloxacin, ciprofloxacin, lomefloxacin, enrofloxacin, and azithromycin) during the in-situ sludge ozone-reduction process. Results indicated that the presence of target antibiotics in the influent (100 μg·L each) had an insignificant influence on the removal of COD, total nitrogen, ammonia, and total phosphorus by the activated sludge. The antibiotic concentrations in the effluent of the reduction system remained fairly stable over the entire operation period, and were similar to those in the effluent of the control system; however, the antibiotic concentrations in the sludge of the reduction system were obviously lower than those in the control system sludge. Mass