Membrane technologies are extensively employed for the separation of surfactant-stabilized oil/water emulsions due to their high efficiency and selectivity. Either membrane filtration or demulsification experiences performance reduction due to the monotonous increase or decrease in emulsion concentration over time. In this study, we have developed a dual-membrane module that integrates a hydrophilic hollow fiber membrane module with a Janus hollow fiber membrane module. This synergistic approach effectively overcomes the limitations of individual filtration and demulsification processes by dynamically adjusting emulsion concentration within the system. Compared to single-membrane modules, the recoveries of both water and oil increased by 27 % and 280 %, respectively. Additionally, the water content in the permeate oil is less than 0.03 %, and the total organic carbon in the permeate water is less than 12 ppm. Furthermore, this design allows for the concurrent recovery of oil and water from emulsions, offering a promising approach to achieving zero liquid discharge.

中文翻译：

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使用集成的亲水性和 Janus 膜组件对水包油乳液进行顺序分离


膜技术因其高效和选择性而被广泛用于分离表面活性剂稳定的油/水乳液。膜过滤或破乳会因乳化浓度随时间单调增加或减少而性能降低。在这项研究中，我们开发了一种双膜组件，它将亲水性中空纤维膜组件与 Janus 中空纤维膜组件集成在一起。这种协同方法通过动态调整系统内的乳化液浓度，有效地克服了单个过滤和破乳过程的局限性。与单膜组件相比，水和油的回收率分别提高了 27% 和 280%。此外，渗透油中的含水量低于 0.03 %，渗透水中的总有机碳低于 12 ppm。此外，这种设计允许同时从乳化液中回收油和水，为实现零液体排放提供了一种有前途的方法。