Polyoxadiazole hollow fibers for produced water treatment by direct contact membrane distillation

Abstract
Treatment of produced water in the petroleum industry has been a challenge worldwide. In this study, we evaluated the use of direct contact membrane distillation (DCMD) for this purpose, removing oil and dissolved elements and supplying clean water from waste. We synthesized fluorinated polyoxadiazole, a highly hydrophobic polymer, to fabricate hollow fiber membranes, which were optimized and tested for simulated produced water and real produced water treatment. The process performance was investigated under different operating parameters, such as feed temperature, feed flow velocity and length of the membrane module for 4 days. The results indicate that by increasing feed temperature and feed flow rate the vapor flux increases. The flux decreased with increasing the length of the module due to the decrease of the driving force along the module. The fouling behavior, which corresponds to flux decline and cleaning efficiency of the membrane, was studied. The performance of the fabricated hollow fiber membranes was demonstrated for the treatment of produced water, complying with the industrial reuse and discharge limits.

Citation
Xu J, Srivatsa Bettahalli NM, Chisca S, Khalid MK, Ghaffour N, et al. (2018) Polyoxadiazole hollow fibers for produced water treatment by direct contact membrane distillation. Desalination 432: 32–39. Available: http://dx.doi.org/10.1016/j.desal.2017.12.014.

Acknowledgements
The research reported in this publication was financially supported by Saudi Aramco (Reference – RGC/3/1582-01-01) and King Abdullah University of Science and Technology (KAUST). The authors thank colleagues of the Nanostructured Polymeric Membrane Lab (npm.kaust.edu.sa) and Water Desalination and Reuse Center (WDRC) for their valuable scientific inputs and data analysis.

Publisher
Elsevier BV

Journal
Desalination

DOI
10.1016/j.desal.2017.12.014

Additional Links
http://www.sciencedirect.com/science/article/pii/S0011916417319203

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