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Investigation of water and salt flux performances of polyamide coated tubular electrospun nanofiber membrane under pressure.
Journal of Environmental Science and Health, Part A ( IF 2.1 ) Pub Date : 2020-02-05 , DOI: 10.1080/10934529.2020.1724011
Serkan Arslan 1 , Murat Eyvaz 1 , Serkan Güçlü 2, 3 , Ayşe Yüksekdağ 2, 3 , İsmail Koyuncu 2, 3 , Ebubekir Yüksel 1
Affiliation  

In this study, a novel osmotic membrane was developed by polyamide (PA) coating on the tubular electrospun nanofiber (TuEN) support membrane. Water and reverse salt flux properties of the obtained membrane were investigated by applying pressure in addition to the osmotic forces. Surface characterization of the membrane was carried out by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) analyses and flux performance tests were performed in both cross flow and submerged membrane setups. Applying pressure from the feed to the concentrate side had significant effects on the water and salt fluxes. Higher pressure differences between the feed and concentrate sides resulted in unexpected high water fluxes up to 500 Lm-2h-1 (LMH). Besides, the pressure helps to transfer the salt content of feed water into the concentrate side, differently from the osmotic process preventing the salinity build-up at the feed side. PA coated TuEN membrane operated under pressure will exhibit a favorable solution in water/wastewater treatment applications, especially for membrane bioreactors (MBR) in terms of preventing salt accumulation in the bioreactor, decreasing the membrane fouling, increasing the volume of product water, and enabling the concentrate management.

中文翻译:

压力下聚酰胺涂层管状电纺纳米纤维膜的水盐通量性能研究。

在这项研究中,通过在管状电纺纳米纤维(TuEN)支撑膜上使用聚酰胺(PA)涂层开发了一种新型的渗透膜。除了渗透力外,还通过施加压力研究所得膜的水和反盐通量性质。膜的表面表征通过傅里叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)进行分析,并在错流和浸没膜设置中进行了通量性能测试。从进料向精矿侧施加压力对水和盐通量有显着影响。进料侧和精矿侧之间较高的压差导致意外的高水通量,最高可达500 Lm-2h-1(LMH)。除了,压力有助于将进料水中的盐分转移到精矿侧,这与渗透过程不同,可以防止进料侧盐分的积累。在压力下运行的PA涂层TuEN膜在水/废水处理应用中将显示出良好的解决方案,特别是对于膜生物反应器(MBR)而言,可以防止盐在生物反应器中积聚,减少膜污染,增加产品水量并实现集中管理。
更新日期:2020-02-05
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