Hashemi Targol, Mehrnia Mohammad Reza, Ghezelgheshlaghi Saeid
School of Chemical Engineering, University College of Engineering, University of Tehran, P.O. Box 11155-45, Tehran, Iran.
J Environ Health Sci Eng. 2022 Jan 30;20(1):375-384. doi: 10.1007/s40201-021-00784-w. eCollection 2022 Jun.
This study aims to investigate the effect of using AlO nanoparticles (NPs) in membrane structure on the operation condition of the membrane bioreactor. To this end, alumina NPs as the high hydrophilic agents with an approximate size of 40 nm and a concentration of 0-3 wt.% were placed within the PAN polymeric membrane matrix structure with high hydrophilicity and high mechanical resistance over the others via the phase inversion method. Characterization of synthesized nanocomposite membranes was carried out by SEM analysis. In the presence of the alumina NPs, the porosity of the membranes improved. The water contact angle measurement confirmed the superior hydrophilicity of mixed PAN membranes compared to the pure polymeric membranes. The best nanocomposite membrane with better antifouling properties was selected to evaluate the MBR's performance in wastewater treatment and assessed in terms of the resistance, flux recovery, and COD removal rates. The result of a comparison with pure membrane showed that by increasing the AlO amount up to 2wt.%, irreversible fouling resistance mitigated as much as 50%. Moreover, the flux recovery ratio was increased by 15%, and the COD removal rate was also raised as large as 16%. Our investigation illustrated that the presence of alumina NPs has improved the MBR performance and decreased the irreversible fouling resistance of the membrane.
本研究旨在探究在膜结构中使用氧化铝纳米颗粒（NPs）对膜生物反应器运行条件的影响。为此，通过相转化法将尺寸约为40 nm、浓度为0 - 3 wt.%的氧化铝NPs作为高亲水剂置于具有高亲水性和高机械抗性的聚丙烯腈（PAN）聚合物膜基质结构中。通过扫描电子显微镜（SEM）分析对合成的纳米复合膜进行表征。在氧化铝NPs存在的情况下，膜的孔隙率得到改善。水接触角测量证实，与纯聚合物膜相比，混合PAN膜具有更优异的亲水性。选择具有更好抗污染性能的最佳纳米复合膜来评估其在污水处理中膜生物反应器的性能，并从阻力、通量恢复和化学需氧量（COD）去除率方面进行评估。与纯膜比较的结果表明，将氧化铝含量增加至2 wt.%时，不可逆抗污染性降低了50%。此外，通量恢复率提高了15%，COD去除率也提高了16%。我们的研究表明，氧化铝NPs的存在改善了膜生物反应器的性能，并降低了膜的不可逆抗污染性。
