MEMBRANE BIOREACTOR PROCESS FOR REMOVING SELECTED ANTIBIOTICS FROM WASTEWATER AT DIFFERENT SOLIDS RETENTION TIMES

作者：Jia Renyong; Jing Danfeng; Li Haixiang; Xie Kang; Huang Tieshi; Zhang Zhiqiang; Xu Xiaotian; Xia Siqing^*

来源：Fresenius Environmental Bulletin, 2011, 20(3A): 754-763.

• Membrane bioreactor
• antibiotics
• solids retention time
• biodegradation
• adsorption

A lab-scale anoxic/oxic membrane bioreactor (A/O-MBR) was operated for selected antibiotics tetracycline (TC), chlortetracycline (CTC), oxytetracycline (OTC), sulfamethoxazole (SMX), sulfadiazine (SDZ) and ampicillin (AMP) removal in the wastewater. The effects of solids retention time (SRT) and hydraulic retention time (HRT) on antibiotics removal were studied, experiment results showed that almost upper 80% of-antibiotics were removed at any SRT and HRT investigated during the whole A/O-MBR process. The reduction of SRT in phase 3 and 4 decreased selected antibiotics removal efficiency. Further studies showed that at short SRT, the change of HRT usually led to fluctuation of the antibiotics removal efficiencies due to the loading alternation. Meanwhile, batch experiments were performed to investigate antibiotics sorption and biodegradation by activated sludge. No evidence of biodegradation for TC, CTC and OTC was observed during the biodegradability tests, and adsorption was found to be the principal removal mechanism of tetracyclines by activated sludge, and adsorption and biodegradation for AMP. The outcomes of the present study demonstrated that the antibiotics SMX, SDZ, and AMP have the possibilities to be degraded biologically during wastewater treatment after an acclimatization of sludge.

• 出版日期2011
• 单位同济大学