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Novel carbon fiber cathode membrane with Fe/Mn/C/F/O elements in bio-electrochemical system (BES) to enhance wastewater treatment

机译:生物电化学系统(BES)中具有Fe / Mn / C / F / O元素的新型碳纤维阴极膜,可增强废水处理能力

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摘要

A novel conductive membrane with Fe/Mn/C/F/O elements is developed, it functions as the catalytic cathode of MFC and the antifouling filter of MBR simultaneously, in a newly designed integrated wastewater treatment system, without proton exchange membrane (PEM). The optimal conductive membrane is characterized using SEM-EDX, XRD and XPS. BET and porous structure analysis of the grounded membrane material indicate a narrow and small pore size (2-7 nm). The membrane surface is rich in Fe species (Fe - Fe2O3 - Fe3O4) and manganese oxide (MnO2). Its characteristics such as excellent electro-chemical oxygen reduction reaction (ORR) activity, high clear water flux ( 240 L/(m(2).h)) and better antifouling filtration performance are further confirmed. The new system features bio-electrochemical system (BES) and integrates bio-filtration (trickling filter and air contact oxidation bed) and proton transfer through quartz sand chamber (QSC) which eliminates the use of expensive proton exchange membrane. The system removes chemical oxygen demand ( 97.4%), ammonia nitrogen ( 96.7%), total phosphorus ( 98.0%) effectively, and it simultaneously generates electricity (446 mW/m(3)). The low cost and high performances, economic and advantageous system has good compatibility with existing wastewater treatment facilities and a wide application prospect.
机译:开发了一种新型的具有Fe / Mn / C / F / O元素的导电膜,在新设计的集成废水处理系统中,该膜可同时用作MFC的催化阴极和MBR的防污过滤器,而无质子交换膜(PEM) 。使用SEM-EDX,XRD和XPS表征最佳导电膜。接地膜材料的BET和多孔结构分析表明,孔径狭窄且较小(2-7 nm)。膜表面富含铁(Fe-Fe2O3-Fe3O4)和氧化锰(MnO2)。它的特性还包括出色的电化学氧还原反应(ORR)活性,高的清水通量(> 240 L /(m(2).h))和更好的防污过滤性能。新系统具有生物电化学系统(BES),并集成了生物过滤(滴滤器和空气接触氧化床)和通过石英砂室(QSC)的质子转移,从而无需使用昂贵的质子交换膜。该系统可有效去除化学需氧量(> 97.4%),氨氮(> 96.7%),总磷(> 98.0%),并同时发电(446 mW / m(3))。低成本,高性能,经济,有利的系统与现有废水处理设施具有良好的兼容性,具有广阔的应用前景。

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