Zhang Fangli, Hou Wei, Yang Zhonglin, Wang Zhaohui, Chen Rizhi, Drioli Enrico, Wang Xiaozu, Cui Zhaoliang
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China.
National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China.
Membranes (Basel). 2023 May 30;13(6):561. doi: 10.3390/membranes13060561.
Aniline is a highly toxic organic pollutant with "carcinogenic, teratogenic and mutagenesis" characteristics. In the present paper, a membrane distillation and crystallization (MDCr) process was proposed to achieve zero liquid discharge (ZLD) of aniline wastewater. Hydrophobic polyvinylidene fluoride (PVDF) membranes were used in the membrane distillation (MD) process. The effects of the feed solution temperature and flow rate on the MD performance were investigated. The results showed that the flux of the MD process was up to 20 L·m·h and the salt rejection was above 99% under the feeding condition of 60 °C and 500 mL/min. The effect of Fenton oxidation pretreatment on the removal rate of aniline in aniline wastewater was also investigated, and the possibility of realizing the ZLD of aniline wastewater in the MDCr process was verified.
苯胺是一种具有“致癌、致畸、致突变”特性的高毒性有机污染物。本文提出了一种膜蒸馏结晶（MDCr）工艺以实现苯胺废水的零液体排放（ZLD）。在膜蒸馏（MD）过程中使用了疏水性聚偏氟乙烯（PVDF）膜。研究了进料溶液温度和流速对MD性能的影响。结果表明，在60℃和500 mL/min的进料条件下，MD过程的通量高达20 L·m·h，脱盐率高于99%。还研究了芬顿氧化预处理对苯胺废水中苯胺去除率的影响，并验证了在MDCr工艺中实现苯胺废水零液体排放的可能性。
