For Vacuum Filter we have a term and definition in Sanitation.

(1) A filter used to accomplish sludge dewatering and consisting of a cylindrical drum mounted on a horizontal axis, covered with filter media and revolving partially submerged in sludge. A vacuum is maintained under the media for the larger part of a revolution to extract moisture. The dewatered cake that is formed is scraped off mechanically for disposal. (2) A diatomaceous earth water filter open to the atmosphere and on the inlet side of a pump.
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