title: Optimization of an A(2)/O process for tetracycline removal via response surface methodology coupled with a Box-Behnken design.
abstract: Response surface methodology (RSM) was used to optimize the operating conditions of an anaerobic-anoxic-oxic (A(2)/O) process by maximizing the removal efficiency of tetracycline (TC). Solid retention time (SRT), hydraulic retention time (HRT) and initial TC concentration (CTC, in) were selected as independent variables for incorporation in the Box-Behnken design. The results showed SRT and CTC, in were more significant parameters than HRT for the removal efficiency of TC. TC could be completely removed under the optimal conditions of an SRT of 15.5 days, an HRT of 9.9 h and a CTC, in of 283.3 μg L(-1). TC removal efficiencies of 99% and 96% were attained for synthetic and real wastewater, respectively, under the optimal conditions. This indicated the constructed model was validated and reliable for optimizing the A(2)/O process for TC removal.
authors.affiliation: a College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University , Shanghai , China.
authors.forename: Fang-Fang
authors.initials: FF
authors.lastname: Qi
authors.forename: Man-Hong
authors.initials: MH
authors.lastname: Huang
authors.forename: Yu
authors.initials: Y
authors.lastname: Zheng
authors.forename: Qi
authors.initials: Q
authors.lastname: Xu
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis / Q000737:chemistry*; D001673:Biodegradation, Environmental; D008956:Models, Chemical; D013752:Tetracycline / Q000032:analysis* / Q000737:chemistry*; D062065:Wastewater / Q000032:analysis / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D013752:Tetracycline; D062065:Wastewater; D014873:Water Pollutants
keywords: Anaerobic-anoxic-oxic (A2/O); Box–Behnken design; operating conditions; response surface methodology (RSM); tetracycline