The aim of this study is to synthesize a magnetic nanocomposite membrane using iron oxide and alumina nanoparticles and employing it in magnetic membrane bioreactors (MBRs) for oily wastewater treatment. Al₂O₃ and Fe₃O₄ nanoparticles with approximate sizes of 20 and 30 nm respectively, were settled into a polysulfone (PSf) membrane matrix via magnetic casting method. The concentration of alumina and iron oxide nanoparticles were 0–0.25 wt% and 0.03 wt%, respectively. Compared with the blank membrane, an increase in the concentration of Fe₃O₄ up to 0.2 wt%, led to the flux as much as 70% and mitigated total resistance by 70%. The presence of the magnetic field around the bioreactor increased the flux significantly and reduced the cake resistance by 93%. Moreover, by applying the static magnetic field to MBR, the Chemical Oxygen Demand (COD) removal rate was increased to 93%, while in the MBR without the magnetic field the COD removal rate was 80%. Our investigation illustrated that the magnetic casting is an effective method to improve the flux and mitigate the fouling of the magnetic nanocomposite membrane. The output of this research indicates that the magnetic casting method enhance the magnetic MBRs performance for wastewater treatment.

本研究的目的是利用氧化铁和氧化铝纳米颗粒合成磁性纳米复合膜，并将其用于磁性膜生物反应器 (MBR) 中用于含油废水处理。Al ₂ O ₃和Fe ₃ O ₄纳米颗粒分别具有大约20和30 nm的尺寸，通过磁性浇铸法被沉降到聚砜（PSf）膜基质中。氧化铝和氧化铁纳米颗粒的浓度分别为 0-0.25 wt% 和 0.03 wt%。与空白膜相比，Fe ₃ O _{4浓度增加}高达 0.2 wt%，导致通量高达 70%，并将总电阻降低 70%。生物反应器周围磁场的存在显着增加了通量并将滤饼阻力降低了 93%。此外，通过对 MBR 施加静磁场，化学需氧量 (COD) 去除率提高到 93%，而在没有磁场的 MBR 中，COD 去除率达到 80%。我们的研究表明，磁性铸造是提高通量和减轻磁性纳米复合膜污染的有效方法。这项研究的结果表明，磁性铸造方法提高了磁性 MBR 用于废水处理的性能。