In this work, a dual-layer nanfibrous SAN4-HIPS membrane has been fabricated via the gas-assisted electrospinning, and employed for industrial textile wastewater treatment by direct contact membrane distillation (DCMD). The obtained results showed that the new membrane is robust and able to remove the contaminants, remarkably, with almost 99.28 %, 97.93 %, and 100 % reductions for COD, BOD and color, respectively. However, a flux decline of up to 42.58 % was observed after 48 h DCMD process. Concerning the rejection results, it can be concluded that the flux decline is mainly caused by the membrane fouling rather than the partial pore wetting as the membrane remained hydrophobic after the 48-h experiment. The surface contact angle reduced from 143.2° to 121.5°. Foulants accumulation on the membrane surface can increase the mass transfer resistance of vapor molecules. This can considerably reduce the productivity. The obtained results were also compared with the literature on the other MD processes, as well as the conventional pressure-driven membrane processes. Further studies on enhancing the membrane surface properties are required to control and reduce the fouling tendency caused by the contaminants in the industrial textile wastewater. This is of crucial for the long-term DCMD performance.

在这项工作中，通过气体辅助静电纺丝制备了双层纳米纤维SAN4-HIPS膜，并通过直接接触膜蒸馏（DCMD）将其用于工业纺织品废水处理。所得结果表明，这种新型膜坚固耐用，能够去除污染物，其COD，BOD和颜色分别减少了近99.28％，97.93％和100％。但是，在DCMD处理48小时后，观察到的通量下降高达42.58％。关于排斥结果，可以得出结论，通量下降主要是由于膜结垢而不是部分孔润湿所致，因为48小时实验后膜仍保持疏水性。表面接触角从143.2°减小到121.5°。污垢积聚在膜表面会增加蒸气分子的传质阻力。这会大大降低生产率。还将获得的结果与其他MD工艺以及常规压力驱动膜工艺的文献进行了比较。为了控制和减少由工业纺织废水中的污染物引起的结垢趋势，需要对增强膜表面性能进行进一步的研究。这对于DCMD的长期性能至关重要。为了控制和减少由工业纺织废水中的污染物引起的结垢趋势，需要对增强膜表面性能进行进一步的研究。这对于DCMD的长期性能至关重要。为了控制和减少由工业纺织废水中的污染物引起的结垢趋势，需要对增强膜表面性能进行进一步的研究。这对于DCMD的长期性能至关重要。