Electro-Fenton enhanced MBR for fouling alleviation based on MIL-88B-Fe derived carbon membrane with in-situ generated OH

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2024-09-23 DOI:10.1016/j.seppur.2024.129853

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Abstract

Porous carbon membrane (PCM) derived from MIL-88B-Fe with the ability of in-situ generation of hydroxyl radical was introduced to electro-enhanced aerobic membrane bioreactor (EMBR) for membrane fouling mitigation and wastewater quality improvement. The resultant PCM obtained with the calcination temperature of 1000 °C owned significant enhancement on hydrophilic and conductive properties, which helped PCM under −1.2 V could completely remove 10 mg/L bovine serum albumin with 2.5 % membrane flux loss rate. During the 76-day operation of EMBR, the extracellular polymeric substances could be suppressed for depositing on the −1.2 V enhanced PCM due to the combined effect of electrostatic barrier and OH oxidation. The pollutant intensity of total cells, polysaccharides and proteins were all reduced on PCM with −1.2 V. After operation, 36.0 % of cake layer pores was blocked in EMBR by total cells, polysaccharides and proteins. However, it was accounted for 69.8 % of the control group. Above results explained why the EMBR owned an always lower transmembrane pressure. Meanwhile, the pollutants removal rates of COD and NH₄⁺-N were as high as 95 % and 98 % with electro-enhanced filtration, respectively, which is attributed to the collaborated effect from electrochemical effect and significantly increased microbial species related to organic pollutants removal, such as Azohydromonas, Thermomonas.

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基于 MIL-88B-Fe 衍生碳膜与原位生成 OH 的电-芬顿增强型 MBR，用于减轻污垢

将具有原位生成羟基自由基能力的 MIL-88B-Fe 制成的多孔碳膜 (PCM) 引入电增强好氧膜生物反应器 (EMBR)，用于减轻膜堵塞和改善废水水质。煅烧温度为 1000 ℃ 的 PCM 具有显著的亲水性和导电性，在 -1.2 V 电压下可完全去除 10 mg/L 的牛血清白蛋白，膜通量损失率为 2.5%。在 EMBR 76 天的运行过程中，由于静电屏障和 OH 氧化的共同作用，细胞外高分子物质沉积在 -1.2 V 增强型 PCM 上的现象得到了抑制。在 -1.2 V 的 PCM 上，总细胞、多糖和蛋白质的污染物强度都有所降低。运行后，总细胞、多糖和蛋白质在 EMBR 中阻塞了 36.0% 的滤饼层孔隙。而对照组的这一比例为 69.8%。上述结果解释了为什么 EMBR 的跨膜压力总是较低。同时，电强化过滤对 COD 和 NH4+-N 污染物的去除率分别高达 95 % 和 98 %，这归功于电化学效应的协同作用以及与有机污染物去除相关的微生物种类的显著增加，如氮氢单胞菌、热单胞菌等。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.