A system and method for removing gas bubbles from fluid. An active filter apparatus forces the bubbles to the center of the filter, while a pump supplies fluid to the filter.

Provided are a method and to a wet scrubber for removing particles from gas. The wet scrubber includes a second vertical cylindrical vessel having a second upper end for receiving an accelerated stream of liquid- and particles-laden gas from a vertically oriented venturi channel and a second lower end for feeding the accelerated stream of liquid- and particles-laden gas to a swirl generator. The second vertical cylindrical vessel and the swirl generator are arranged in a vertical cylindrical separation space of a first vertical cylindrical vessel. The swirl generator is arranged above the liquid tank.

A system and method for removing gas bubbles from fluid. An active filter apparatus forces the bubbles to the center of the filter, while a pump supplies fluid to the filter.

A system and method for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter.

Air filtration devices are described for wet air filtration. In exemplary embodiments, an air filtration device includes a housing having an air intake and an air outlet. An air conduit extends between the air intake and the air outlet. A fan is positioned in the air conduit and configured to draw air into the device via the air intake and propel the air through an air channel towards the air outlet. The air conduit includes a liquid introduction section configured to introduce a liquid to the air in the air channel, and a liquid removal section configured to guide the air in a downward helical path downstream of the liquid introduction section configured to separate the liquid from the air using centrifugal force.