title: [Investigation for Filamentous Bacteria Community Diversity in Activated Sludge Under Various Kinds and Concentration Conditions of Antibiotics].
abstract: Three kinds of synthetic antibiotic (spiramycin, oxytetracycline, streptomycin) wastewater were continuously treated by parallel aerobic biofilm reactors for 6 months, respectively. Sludge bulking phenomenon caused by overgrowth of filamentous bacteria was observed under long-term high rbCOD and high C/N conditions in all reactors as showed by the Eikelboom and Jenkins examinations. The qualitative analysis of filamentous bacterial population in the biofilm and suspended sludge using fluorescence in situ hybridization (FISH) showed that the dominated filamentous bacteria in the bioreactor were N. limicola II and Thiothrix II. Under conditions of different antibiotic concentrations (5 mg x L(-1), 25 mg x L(-1)), there was no obvious change in the COD removal efficiency of the parallel reactors, while the NH4+ -N concentration (about 20 mg x L(-1)) occurred under high streptomycin concentration. The filamentous bacteria abundance was reduced with the increasing antibiotic concentration, especially significant for N. limicola II. Terramycin had a significant inhibitory effect on filamentous bacteria population, followed by Streptomycin and Spiramycin.
authors.forename: Run-fang
authors.initials: RF
authors.lastname: Wang
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Rong
authors.initials: R
authors.lastname: Qi
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry*; D001419:Bacteria / Q000187:drug effects*; D019149:Bioreactors; D017404:In Situ Hybridization, Fluorescence; D010118:Oxytetracycline; D012722:Sewage / Q000382:microbiology*; D015572:Spiramycin; D013307:Streptomycin; D062065:Wastewater / Q000382:microbiology
chemical_list: D000900:Anti-Bacterial Agents; D010118:Oxytetracycline; D012722:Sewage; D015572:Spiramycin; D013307:Streptomycin; D062065:Wastewater