As a factor affecting the efficiency of hollow fiber membrane filtration, air resistance is gradually being discovered. To obtain a better air resistance control strategy, in the study, two representative strategies have been proposed, namely, membrane vibration and inner surface modification, which was achieved by aeration combined with looseness-induced membrane vibration and dopamine (PDA) hydrophilic modification of the inner surface, respectively. The performance of two strategies was based on Fiber Bragg Grating (FBG) sensing technology and ultrasonic phased array (UPA) technology to achieve real-time monitoring. Mathematical model result shows that in hollow fiber membrane modules, the initial appearance of air resistance causes a rapid reduction in filtration efficiency, while this effect diminishes as the air resistance increases. Besides, experimental results show that aeration combined with fiber looseness helps to inhibit air aggregation and accelerate air escape, while inner surface modification enhances the hydrophilicity of inner surface, weakens the air adhesion and increases the drag force of fluid on air bubbles. In the corresponding optimized state, both strategies perform well in optimizing the air resistance control, and the improvement in flux enhancement ability for the two strategies is 26.92 and 34.10%, respectively.

作为影响中空纤维膜过滤效率的因素，空气阻力逐渐被人们发现。为了获得更好的空气阻力控制策略，研究中提出了两种代表性策略，即膜振动和内表面改性，通过曝气结合松动引起的膜振动和多巴胺（PDA）亲水改性来实现分别为内表面。两种策略的性能均基于光纤布拉格光栅（FBG）传感技术和超声相控阵（UPA）技术来实现实时监测。数学模型结果表明，在中空纤维膜组件中，空气阻力的最初出现导致过滤效率迅速降低，而这种影响随着空气阻力的增加而减弱。除了，实验结果表明，通气结合纤维疏松有助于抑制空气聚集，加速空气逸出，而内表面改性则增强了内表面的亲水性，减弱了空气的附着力，增加了流体对气泡的曳力。在相应的优化状态下，两种策略在优化空气阻力控制方面均表现良好，两种策略的通量增强能力分别提高了26.92%和34.10%。