The asymmetric morphology of silicon nitride (Si₃N₄) ceramic hollow fiber membrane with a selective spongiform outer layer was optimized by the air gap distance and the internal rate of coagulate for oil/water emulsion microfiltration. The effect of trans-membrane pressure (TMP), feed flow rate (FFR), and pH of the feeding emulsion on the separation performance were determined experimentally. Membrane fouling has increased by dissociation of oil droplets during filtration at high TMP and FFR values. Fouling phenomena were studied based on standard pore blocking model. The pH by affecting the surface charge of the Si₃N₄ hollow fibers and zeta potential of the feed emulsion has also been introduced as a prominent influential factor on separation efficiency. The highest values of permeate flux (390 Lm⁻²h^-1) and oil rejection (95%) were recorded in alkaline pH. The fabricated Si₃N₄ ceramic membranes were completely recovered (≤99%) by simple thermal treatment at 400 °C.

通过气隙距离和油/水乳状液微滤的内部凝结速率，优化了具有选择性海绵状外层的氮化硅（Si ₃ N ₄）陶瓷中空纤维膜的不对称形态。实验确定了跨膜压力（TMP），进料流速（FFR）和进料乳液的pH对分离性能的影响。在高TMP和FFR值下过滤过程中油滴的离解增加了膜的结垢。基于标准的孔堵塞模型研究结垢现象。通过影响Si ₃ N ₄的表面电荷来调节pH还引入了中空纤维和进料乳液的ζ电势作为影响分离效率的重要因素。在碱性pH下记录了最高的渗透通量（390 Lm ^-2 h ^-1）和排油率（95％）。通过在400°C的简单热处理，可以完全回收所制成的Si ₃ N ₄陶瓷膜（≤99％）。