生物污染
膜
结垢
超滤(肾)
反渗透
化学工程
化学
过滤(数学)
正渗透
结晶紫
材料科学
色谱法
医学
生物化学
统计
数学
病理
工程类
作者
Nurshaun Sreedhar,Navya Thomas,Oraib Al‐Ketan,Reza Rowshan,Héctor H. Hernández,Rashid K. Abu Al‐Rub,Hassan A. Arafat
出处
期刊:Desalination
[Elsevier BV]
日期:2018-01-01
卷期号:425: 12-21
被引量:131
标识
DOI:10.1016/j.desal.2017.10.010
摘要
In this proof of concept study, 3D printed feed spacers with complex geometries based on triply periodic minimal surfaces (TPMS) were designed and tested in reverse osmosis (RO) and ultrafiltration (UF) processes. The spacers showed flux enhancement of 15.5% and 38% in brackish water RO and UF tests with sodium alginate solution, respectively, in comparison to a commercial feed spacer. Moreover, lower feed channel pressure drop was also observed for the TPMS spacers. Biofouling tests were performed and the membranes were characterized using total organic carbon (TOC) and fluorescence microscopy. The TPMS spacers yielded a reduction in biofouling when compared to commercial feed spacers. Fouling patterns on the membranes were visualized for the different spacers using crystal violet stain, which also revealed a significantly reduced biofilm deposition using the TPMS spacers. The TPMS-based feed spacers have shown great promise in enhancing both RO and UF membrane processes, both in terms of flux enhancement and fouling reduction.
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