The disclosure relates to an air filter arrangement for cleaning a bitumen-containing volume flow, comprising at least a first filter element and a second filter element, which are arranged as filter elements acting in succession for cleaning the bitumen-containing volume flow, wherein the first filter element and the second filter element are fixedly connected to one another. Furthermore, the disclosure relates to a method for carrying out an exchange of a plurality of filter elements.

A disinfecting apparatus for cleaning, disinfecting, and sanitizing a wide variety of devices used by medical personnel, law enforcement and correctional facilities, body art establishments, and the like, comprises a top portion, an upper portion that includes a main tank, and a lower portion that includes a water pump and reservoir tank. The water pump conveys the disinfectant solution from the main tank through a filter to the piping system that delivers the disinfectant solution to the plurality of jets that dispense the disinfectant solution to the devices held on a removable holding device within the interior chamber. The devices are then further sanitized and sterilized by a blower and UV-C light exposure.

An air/particle separation device which comprises a container and a rotary filter positioned in the container, between a laden-air inlet and a treated-air outlet, the container is configured to channel air laden with particles through the rotary filter, the rotary filter comprises at least one block of cellular material configured to be passed through by the laden air and to promote the separation of the particles from the laden air and the ejection of the particles from the rotary filter which migrate, by virtue of the centrifugal effect, toward the periphery of the rotary filter.