title: [Distribution and removal of anaerobic antibiotic resistant bacteria during mesophilic anaerobic digestion of sewage sludge].
abstract: Sewage sludge is one of the major sources that releasing antibiotic resistant bacteria (ARB) and antibiotic resistant genes (ARG) into the environment since it contains large amount of ARB, but there is little information about the fate of the anaerobic ARB in the anaerobic digestion of sewage sludge. Therefore, the distribution, removal and seasonal changes of tetracycline and β-lactam antibiotics resistant bacteria in the mesophilic egg-shaped digesters of a municipal wastewater treatment plant were investigated for one year in this study. Results showed that there were higher amounts of ARB and higher resistance rate of β-lactam antibiotics than that of tetracycline antibiotics in the sewage sludge. All ARB could be significantly reduced during the mesophilic anaerobic digestion process by 1.48-1.64 log unit (P < 0.05). Notably, the ampicillin and cephalothin resistance rates were significantly increased after anaerobic digestion by 12.0% and 14.3%, respectively (P < 0.05). The distribution of ARB in the sewage sludge had seasonal change characteristics. Except for chlorotetracycline resistant bacteria, there were more ARB in the sewage sludge in cold season than in warm season (P < 0.05).
authors.forename: Juan
authors.initials: J
authors.lastname: Tong
authors.forename: Yuan-Yue
authors.initials: YY
authors.lastname: Wang
authors.forename: Song
authors.initials: S
authors.lastname: Wei Yuan
mesh_terms: D000900:Anti-Bacterial Agents; D001421:Bacteria, Anaerobic / Q000145:classification* / Q000187:drug effects; D019149:Bioreactors / Q000382:microbiology*; D024881:Drug Resistance, Bacterial; D012621:Seasons; D012722:Sewage / Q000382:microbiology*; D013753:Tetracycline Resistance; D018440:beta-Lactam Resistance
chemical_list: D000900:Anti-Bacterial Agents; D012722:Sewage