The purpose of this work is to study the influence of oil and surfactant present in produced water on the membrane distillation and membrane crystallization performance. The latter is evaluated in terms of permeate flux, quality of permeate and sodium chloride crystallization kinetics. Polypropylene and Hyflon AD40H/PVDF composite membranes with 0.2 \(\mathrm{\mu m}\) pore size were used in the investigation. The tests were carried out in direct contact configuration using two synthetic feed solutions: the first one without oil and surfactant, and the second one with oil and surfactant. The achieved results showed a permeate flux reduction of 20 and 40% for PP and AD40H, respectively, in membrane distillation and of 35% in membrane crystallization. These results may be attributed to the interaction between the salts and surfactant, which led to the deterioration of the membrane performance. Despite this, high salt rejection factors greater than 99.9% and total carbon rejections ranging between 80 and 90% indicated the good potential of membrane distillation technology for the treatment of produced water. Moreover, good quality crystals and high total water recovery factor (97%) were achieved using the membrane crystallization process. Nevertheless, the presence of oil and surfactant in the feed caused an increase in the induction time compared to the system without oil and surfactant. In addition, in the performed experiments, simple physical cleaning with distillate water was sufficient to recover the initial trans-membrane flux of the membranes.

这项工作的目的是研究采出水中存在的油和表面活性剂对膜蒸馏和膜结晶性能的影响。后者根据渗透通量、渗透质量和氯化钠结晶动力学进行评估。研究中使用孔径为 0.2 \(\mathrm{\mu m}\) 的聚丙烯和 Hyflon AD40H/PVDF 复合膜 。使用两种合成进料溶液以直接接触配置进行测试：第一种不含油和表面活性剂，第二种含有油和表面活性剂。所获得的结果表明，PP 和 AD40H 在膜蒸馏中的渗透通量分别降低了 20% 和 40%，在膜结晶中分别降低了 35%。这些结果可能归因于盐和表面活性剂之间的相互作用，导致膜性能恶化。尽管如此，高于 99.9% 的高脱盐率和 80% 至 90% 之间的总碳脱除率表明膜蒸馏技术在采出水处理方面具有良好的潜力。此外，使用膜结晶工艺获得了良好的晶体质量和高总水回收率（97%）。然而，与不含油和表面活性剂的系统相比，进料中油和表面活性剂的存在导致诱导时间增加。此外，在进行的实验中，用蒸馏水进行简单的物理清洗足以恢复膜的初始跨膜通量。