Center for Water Research and Technologies (CERTE), Technopark of Borj Cedria, P.B. 273 - 8020, Soliman, Tunisia.
Technische Universitaet Berlin (TU Berlin), Sekr. KF 2, Straße des 17. Juni 135, 10623, Berlin, Germany.
Environ Sci Pollut Res Int. 2019 Jul;26(19):18979-18992. doi: 10.1007/s11356-018-2475-3. Epub 2018 Jun 11.
Membrane distillation is getting increasing attention thanks to its advantages in terms of energy consumption and final permeate quality in addition to its resistance against highly corrosive media which forms an appealing solution for industrial wastewater treatment. Despite its advantages, one of the most challenging issues in direct contact membrane distillation (DCMD) is membrane fouling and wetting. In the present research work, saline dairy effluent discharged from hard cheese industry was pretreated by macrofiltration (MAF) and ultrafiltration (UF) and processed by DCMD to investigate the extent of the aforementioned issues. Effluents pretreated by UF have led the best process performance with stable flux values at different operating conditions. Fouling has occurred in all the experiments, though their effect on the flux behavior and membrane wetting was different from one feed to the other. Changing the flow rate and the temperature difference have affected slightly the membrane wettability for all feed qualities. In all experiments, the permeate has maintained a good quality with low electrical conductivity that did not exceed 70 μS/cm and low total organic carbon < 2 mg/L.
膜蒸馏由于其在能耗和最终渗透质量方面的优势，以及对腐蚀性介质的抵抗力，因此越来越受到关注，这为工业废水处理提供了一种有吸引力的解决方案。尽管具有这些优势，但直接接触式膜蒸馏（DCMD）中最具挑战性的问题之一是膜污染和润湿。在本研究工作中，硬奶酪工业排放的含盐乳清废水先经过微滤（MAF）和超滤（UF）预处理，然后通过 DCMD 进行处理，以研究上述问题的严重程度。经 UF 预处理的废水具有最佳的处理性能，在不同操作条件下通量值稳定。所有实验中都发生了污染，但污染对通量行为和膜润湿的影响因进料而异。改变流速和温差对所有进料质量的膜润湿性影响很小。在所有实验中，渗透物的质量都很好，电导率低，不超过 70 μS/cm，总有机碳 < 2 mg/L。
