Abstract A new carbon-based RGO/PVDF/MnO2 conductive membrane was developed to treat high load wastewater and recovery energy through bio-electrochemical system (BES), combining Membrane bioreactor (MBR) and Microbial fuel cell (MFC). The conductive membrane dual functions as the cathode of MFC and the filtration medium of MBR simultaneously. The structures of the conductive membrane were investigated by SEM, EDX and XPS, the existence of manganese dioxide catalyst, the high porosity and smooth surface morphology were confirmed. During operation, the membrane always maintained distinct ORR and electrochemical activity, exhibited excellent anti-fouling and flux recovery property, also better COD removal property than the control membrane without MnO2. Replacing proton exchange membrane (PEM) using Quartz sand chamber (QSC), the BES power density was 228 mW/m3 higher than using PEM. The internal resistance, calculated in accordance with the power density curve using QSC was lower than that of the control group (respectively 752 Ω and 937 Ω). The results confirmed that it was feasible to replace the expensive PEM with cheap materials. The novel carbon-based conductive membrane with in-situ formed MnO2 catalyst and constructed BES with QSC were promising and beneficial for the future scale-up of BES.

中文翻译：

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用于生物电化学系统（BES）废水处理的具有原位形成的MnO 2 催化剂的新型碳基导电膜的开发

摘要 结合膜生物反应器（MBR）和微生物燃料电池（MFC），开发了一种新型碳基RGO/PVDF/MnO2导电膜，通过生物电化学系统（BES）处理高负荷废水并回收能源。导电膜兼作MFC的阴极和MBR的过滤介质。通过SEM、EDX和XPS研究了导电膜的结构，证实了二氧化锰催化剂的存在，高孔隙率和光滑的表面形貌。在运行过程中，该膜始终保持明显的ORR和电化学活性，表现出优异的防污性能和通量恢复性能，COD去除性能也优于不含MnO2的对照膜。使用石英砂室 (QSC) 更换质子交换膜 (PEM)，BES 功率密度比使用 PEM 高 228 mW/m3。根据使用 QSC 的功率密度曲线计算的内阻低于对照组（分别为 752 Ω 和 937 Ω）。结果证实，用廉价材料替代昂贵的 PEM 是可行的。具有原位形成的 MnO2 催化剂的新型碳基导电膜和用 QSC 构建的 BES 有希望并有利于未来 BES 的放大。