Landfill leachate (LFL) is one of the most serious environmental problems due to the high concentrations of toxic and hazardous matters. Although several physical, chemical, methods have been tested, biological processes and single or multiple-stage combinations of them have been receiving more attention due to their cost-effective and environmentally-friendly manner. The present work recommended coupling of conventional single-stage A/O with moving bed biofilm reactor and membrane bioreactor (AnoxMBBR/AeMBR) for LFL treatment. The system performance was evaluated for 233 d under varying nitrate concentrations (100–1000 mgNO₃⁻-N/L), sludge retention time (SRT) (30–90 d), and HRT (24–48 h) in AnoxMBBR, and constant SRT (infinite) and HRT (48 h) in the AeMBR. The best system performances were observed at 1000 mgNO₃⁻-N/L concentration, SRT of 90 d and HRT of 48 h, and the average removal efficiencies of chemical oxygen demand (COD), ammonia nitrogen (NH₄⁺-N), and nitrate‑nitrogen (NO₃⁻ N) were 74.2%, 99.7%, and 89.1%, respectively. Besides, the AeMBR was achieved above 99% NH₄⁺-N removal and not adversely affected by varying operation conditions of AnoxMBBR. A slight increase in selected phthalic acid ester (PAE) concentrations (diethyl phthalate (DEP), di (2-Ethylhexyl) phthalate (DEHP), diisononyl phthalate (DINP)) was detected in the AnoxMBR, and complete PAEs removal was attained in the AeMBR. Mg, Al, Si, Na, Fe was detected by SEM-EDX analyses in both biofilm of AnoxMBBR and the cake layers of AeMBR. Nitrobacter and Nitratireductor which showed a relatively high abundance played an important role in the removal of NH₄⁺-N and COD in LFL. The results confirmed that the proposed sequence is efficient for COD removal, nitrogen removal, and PAEs being an acceptable treatment for landfill leachates.

由于高浓度的有毒有害物质，垃圾填埋场渗滤液（LFL）是最严重的环境问题之一。尽管已经测试了几种物理，化学方法，但由于它们具有成本效益和环境友好的方式，其生物过程以及它们的单阶段或多阶段组合受到了越来越多的关注。本工作建议将传统的单级A / O与移动床生物膜反应器和膜生物反应器（AnoxMBBR / AeMBR）结合起来进行LFL处理。系统的性能进行了评估233 d在变化的硝酸盐浓度（100-1000 mgNO ₃ ^--N / L），AnoxMBBR中的污泥保留时间（SRT）（30–90 d）和HRT（24–48 h），以及AeMBR中的恒定SRT（无限）和HRT（48 h）。在1000 mgNO ₃ ^-- N / L浓度，90 d的SRT和48 h的HRT以及化学需氧量（COD），氨氮（NH ₄ ⁺ -N）的平均去除效率，硝酸盐氮和硝酸盐氮（NO ₃ ^- N）分别为74.2％，99.7％和89.1％。此外，AeMBR的NH ₄ ⁺含量高于99％-N去除且不受AnoxMBBR操作条件变化的不利影响。在AnoxMBR中检测到选定的邻苯二甲酸酯（PAE）浓度（邻苯二甲酸二乙酯（DEP），邻苯二甲酸二（2-乙基己基）酯（DEHP），邻苯二甲酸二异壬酯（DINP））的浓度略有增加，并且在该产品中可以完全去除PAEs。 AeMBR。通过SEM-EDX分析在AnoxMBBR的生物膜和AeMBR的滤饼层中检测到Mg，Al，Si，Na，Fe。丰度较高的硝化细菌和硝化还原剂对LFL中NH ₄ ⁺ -N和COD的去除起着重要作用。结果证实，所提出的顺序对于去除COD，去除氮和PAEs是垃圾渗滤液的可接受处理是有效的。