A novel air backwashing method for reversing wetting in membrane distillation
Author(s)Arafat, Hassan A.
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This paper describes a new method to reverse wetting of the hydrophobic membrane in membrane distillation. Pressurized air is pushed through the wetted membrane from the distillate side, thus forcing out wetted feed water, instead of merely allowing it to evaporate. To test its effectiveness, the liquid entry pressure (LEP) of the membranes was tested before and after the pressurized-air process. The results reveal that the air backwashing method was very effective, restoring LEP to nearly 85% of the original value, without requiring the long delay times associated with dryout.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
AMTA/AWWA Membrane Technology Conference
American Membrane Technology Association (AMTA)
Warsinger, David M. et al. "A novel air backwashing method for reversing wetting in membrane distillation." AMTA/AWWA Membrane Technology Conference, February 13-17, 2017, Long Beach, California, USA, American Membrane Technology Association (AMTA), February 2016
Author's final manuscript