(158d) Investigation of Vacuum Membrane Distillation (VMD) Operation Parameters to Minimize the Polarization Effect

Vacuum membrane distillation (VMD) is an attractive variant of the novel membrane distillation process, which is promising for various separations, including water desalination. This publication is part of an effort to develop a capillary membrane module for various applications, as well as a model that would facilitate VMD process design. Experiments were conducted in a laboratory pilot VMD unit, comprising PTFE membrane module. Performance data, collected at modest temperatures (50 â—¦C to 60 â—¦C) and flowrate (2.00 L/min to 2.5 L/min) with real red sea water, confirmed the improved system productivity with increasing feed-water temperature; excellent salt rejection was obtained. Temperature and concentration polarization were discussed and explained and obtained the optimized value as well as new approach was achieved. Future Recommendations were shared for improvement.