The membrane aerated biofilms reactor (MABR) is an emerging technology in wastewater treatment with particular advantages including high rate nitrification, and very high oxygen transfer efficiencies. In this study a synthetic feed water incorporating tetracycline (TC) was investigated in a MABR. Simultaneous removal of ammonium and tetracycline (TC) in the reactor, formation of TC transformation products (TPs), and microbial community analysis in the biofilm growing on the membrane were performed. A range of TC and ammonium loading rates and the effect of different intra-membrane oxygen pressures were on treatment performance were systematically investigated. Successful nitrification and TC degradation were achieved with the highest TC removal (63%) obtained at a HRT of 18 h HRT and 0.41 bar gas pressure. It has shown that different operating conditions (HRT and gas pressure) do not cause a significant change in ammonium removal. The concentration of TPs such as ETC, EATC, and ATC was determined to be at the ppb level. Molecular results showed that MABR reactor was mainly dominated by β-proteobacteria. The relative abundance of this group decreased in parallel with the increasing ammonium and TC loading.

膜曝气生物膜反应器（MABR）是废水处理中的新兴技术，具有特别优势，包括高速率硝化和非常高的氧气传输效率。在这项研究中，在MABR中研究了含有四环素（TC）的合成给水。同时去除反应器中的铵和四环素（TC），形成TC转化产物（TPs）以及在膜上生长的生物膜中进行微生物群落分析。系统地研究了一系列的TC和铵负载率以及不同的膜内氧气压力对治疗性能的影响。在18 h HRT和0.41 bar气压下获得最高的TC去除率（63％），成功实现了硝化和TC降解。结果表明，不同的操作条件（HRT和气压）不会导致铵去除的明显变化。诸如ETC，EATC和ATC之类的TP的浓度确定为ppb水平。分子结果表明MABR反应器主要由β-proteobacteria。该组的相对丰度随着铵和TC含量的增加而降低。