Transport phenomena and fouling in vacuum enhanced direct contact membrane distillation: Experimental and modelling

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Journal Article
Separation and Purification Technology, 2017, 172 pp. 285 - 295
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© 2016 Elsevier B.V. The application of vacuum to direct contact membrane distillation (vacuum enhanced direct contact membrane distillation, V-DCMD) removed condensable gasses and reduced partial pressure in the membrane pores, achieving 37.6% higher flux than DCMD at the same feed temperature. Transfer mechanism and temperature distribution profile in V-DCMD were studied. The empirical flux decline (EFD) model represented fouling profiles of V-DCMD. In a continuous V-DCMD operation with moderate temperature (55 °C) and permeate pressure (300 mbar) for treating wastewater ROC, a flux of 16.0 ± 0.3 L/m2 h and high quality distillate were achieved with water flushing, showing the suitability of V-DCMD for ROC treatment.
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