ULTRASONICALLY ACTUATED MEMBRANE

摘要

A filter apparatus comprising (1) a product inlet (6); a filtrate outlet and a porous stiff filter structure (4). The filter structure separates the product inlet from the filtrate outlet. An ultrasonic actuator (9) is provided that is directly mechanically coupled to the porous stiff filter structure. The actuator is arranged for imparting in -plane vibrational waves to the porous stiff filter structure. Accordingly an enhanced filtration can be provided.