摘要
      在此，我们提出了一种高铁酸盐增强电凝聚/超滤（fECUF）系统，该系统具有在Fe（II）氧化过程中去除污染物的三种途径，在城市污水回用中实现了卓越的产水能力、良好的结垢控制和显著的环境风险降低。该系统解决了传统电絮凝工艺引起的无机膜快速污染问题。在fECUF中形成具有双层结构的独特滤饼层有利于减少有机物和无机物在膜孔中的积累并保持膜通量。与超滤控制系统相比，fECUF系统将跨膜压力降低了63.13%。冗余分析证实，氧化主导了类腐殖物质和UV254的去除，而氧化和混凝协同促进了DOC、类蛋白质物质和微量有机物的减少。此外，凝血有助于抗生素抗性基因（ARGs）的去除，这降低了它们通过水平基因转移机制广泛转化的能力。与UF控制系统相比，fECUF中四个ARG的减少量高出4.48–39.76倍。总体而言，本研究验证了fECUF系统在膜污染控制和水回收污染物减少方面的潜在优势。
Abstract
Herein, we presented a ferrate-enhanced electrocoagulation/ultrafiltration (fECUF) system with three pathways of contaminants removal during the oxidation of Fe(II), realizing superior water production, excellent fouling control, and outstanding environmental risk reduction in municipal wastewater reuse. The system addressed the issue of the rapid inorganic membrane fouling caused by the traditional electrocoagulation processes. The formation of a unique cake layer with a bilayer structure in fECUF was favored to decrease the accumulation of organics and inorganics in membrane pores and maintain the membrane flux. Compared with the UF control system, the fECUF system decreased the transmembrane pressure by 63.13%. Redundancy analysis confirmed that oxidation dominated the removal of humic-like substances and UV254, while oxidation and coagulation synergistically promoted the reduction of DOC, protein-like substances, and trace organics. Also, coagulation contributed to the removal of antibiotics resistance genes (ARGs), which reduced their ability to be widely transmuted by a horizontal gene transfer mechanism. Compared to the UF control system, 4.48–39.76 times higher reduction of four ARGs were obtained in fECUF. Overall, this study has verified the potential advantages of the fECUF system in membrane fouling control and contaminants reduction for water reclamation.

https://www.sciencedirect.com/science/article/abs/pii/S1383586622011431