Sewage treatment efficiency is affected by the membrane module design. In this study, SiO was employed as additives in the formation of polyethylene/SiO hollow fibre composite membranes using the thermally induced phase separation (TIPS) method. This approach effectively addressed the limitations of pure polyethylene hollow fibres, such as poor network pore structure and low flux. The investigation revealed that the addition of SiO enhanced gas flux by 30%, increased porosity by 20%, and provided a commendable tensile strength of 2.1 MPa, suitable for weaving knitted composite membrane module. The voids of the membrane module facilitated particle filtration and microfiltration through micropores of the composite membrane, successfully integrated into a one-step wastewater treatment process. The knitted composite membrane module's particle filtration process effectively intercepted all particles A (size > 30 μm), and the microfiltration process rejected particles B (1.3 < size <15 μm). During these processes, the rejection rate of talc powder in the membrane module was as high as 90%, and the gas flux was remained at 1200 L·m·min. The strategy of knitted composite membrane modules demonstrates versatility in applications and has the potential for expanding the design to various microporous hollow fibre materials for diverse separation purposes.

中文翻译：

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用于废水处理中一步微滤和颗粒去除的针织聚乙烯/SiO2复合膜组件的制造

污水处理效率受膜组件设计的影响。在这项研究中，SiO2作为添加剂，采用热致相分离（TIPS）方法形成聚乙烯/SiO2中空纤维复合膜。该方法有效解决了纯聚乙烯中空纤维网络孔结构差、通量低等局限性。研究表明，SiO的添加使气体通量提高了30%，孔隙率提高了20%，并提供了值得称赞的2.1 MPa的拉伸强度，适合编织针织复合膜组件。膜组件的空隙有利于通过复合膜的微孔进行颗粒过滤和微滤，成功地集成到一步式废水处理过程中。针织复合膜组件的颗粒过滤工艺有效拦截了所有颗粒A（尺寸>30μm），微滤工艺拒绝了颗粒B（1.3<尺寸<15μm）。在此过程中，膜组件中滑石粉的截留率高达90%，气体通量保持在1200 L·m·min。针织复合膜组件的策略展示了应用的多功能性，并且有可能将设计扩展到各种微孔中空纤维材料，以实现不同的分离目的。