Abstract In this work, the combination of advanced oxidation technologies (AOTs) and direct contact membrane distillation (DCMD) was investigated for the treatment of municipal wastewater collected from the secondary clarifier of a municipal wastewater treatment plant (MWWTP). Average removal efficiencies of the 12 micropollutants present in the wastewater samples were higher than 95 % with ozonation (O3) and photolytic ozonation (UV/O3), whereas only near 50 % of removal efficiency was achieved with UV-peroxidation (UV/H2O2). When the ozone-based processes were combined with DCMD, the concentration of these micropollutants were below the detection limits in the respective permeate, increasing the quality of the treated water. However, the permeate fluxes in DCMD were remarkably higher when the wastewater was pre-treated with UV/H2O2 instead of O3, most probably due to the better disinfection achieved by UV/H2O2. It was also confirmed that the dissolved organic carbon (DOC) of the wastewater strongly affects the permeate fluxes achieved by DCMD. In this regard, the combination of the oxidation and membrane separation processes is more appropriate for wastewaters with low DOC contents (

中文翻译：

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高级氧化技术结合直接接触膜蒸馏处理城市二次污水

摘要 在这项工作中，研究了高级氧化技术 (AOTs) 和直接接触膜蒸馏 (DCMD) 的组合处理从市政污水处理厂 (MWWTP) 二级澄清池收集的市政污水。使用臭氧化 (O3) 和光解臭氧化 (UV/O3)，废水样品中存在的 12 种微污染物的平均去除效率高于 95%，而使用紫外线过氧化 (UV/H2O2) 仅实现了接近 50% 的去除效率. 当基于臭氧的工艺与 DCMD 相结合时，这些微污染物的浓度低于相应渗透物中的检测限，从而提高了处理水的质量。然而，当废水用 UV/H2O2 而不是 O3 预处理时，DCMD 中的渗透通量显着更高，很可能是由于 UV/H2O2 实现了更好的消毒。还证实废水的溶解有机碳 (DOC) 强烈影响 DCMD 实现的渗透通量。在这方面，氧化和膜分离工艺的结合更适合于低 DOC 含量的废水（