固定化膜生物反应器处理含抗生素污水

Treatment of sewage containing antibiotics by immobilized membrane bioreactor

采用细菌固定化技术包埋活性污泥浓缩液,并利用A/O膜生物反应器处理含抗生素生活污水,考察了膜生物反应器在抗生素存在条件下降解有机物及氮素的性能,并对土霉素为代表的抗生素的去除效果进行分析。结果表明,人工模拟抗生素污水的COD、TOC、NH4+-N、TN及土霉素浓度分别为325～413、101.35～206.10、15.51～24.54、15.00～25.30和0.17～0.47 mg/L,水力停留时间为6、12和24 h的条件下,系统的出水平均COD、TOC、NH4+-N和TN分别维持在50、20、1和3 mg/L以下,对土霉素的平均去除率分别达到64%、72%和75%;研究还发现固定化膜生物反应器对进水中氨氮的波动具有良好的抗冲击负荷能力且可以延缓膜污染,正确调整水处理工艺的运行工序可以在提高水处理效率的同时有效降低水环境中的抗生素药物含量。

This paper introduced the removal performance of antibiotics and other organic pollutants in wastewater containing antibiotics by anoxic/aerobic（A/O） membrane bioreactor combined with immobilized technology.The influent used in this study was synthetic wastewater and its concentrations of COD,TOC,NH＋4-N,TN and oxytetracyclines（OTC） were 325～413 mg/L,101.35～206.10 mg/L,15.51～24.54 mg/L,15.00～25.30 mg/L and 0.17～0.47 mg/L,respectively.The results showed that the average COD,TOC,NH＋4-N,TN of the effluent were lower than 50 mg/L,20 mg/L,1 mg/L and 3 mg/L,and the removal efficiencies of oxytetracycline（OTC） were 64%,72%,75% with the HRT 6 h,12 h,24 h,respectively.It was also found that the immobilized MBR had a strong ability to nitrogen loading shock and a better anti-fouling capability.So,if the operation conditions of water treatment process could be adjusted correctly,the efficiency of water treatment could be enhanced and the quantity of antibiotics released into the environment could be reduced effectively.