Piezo-Electric Membranes are membranes whose cross-sectional dimensions change with the application of electrical current.
They use vibration of the membrane surface to prevent the accumulation of solutes and particles, which are prevented from binding to each other and the membrane surface, allowing cross-flow to remove the potential fouling agents.
Vibration is induced by applying a small AC signal to the piezo-electric membranes.
Piezo-electric membranes have application in the treatment of low salinity, high particulate content waste-water.
Papers relating to Piezo-Electric Anti-Fouling Membranes.