Discloses apparatus for separating the solids from a liquid of a sludge or slurry which includes a slurry source, a slurry container receiving slurry from the source and a filter cage removably mounted inside the container. The filter cage includes a cage frame, a supported screen liner mounted within the cage and a filter liner removably fitted inside the liner. The container has a liquid drainage conduit removably connected to a suction device for removing liquid from the drainage chamber. The container is constructed and adapted to be picked up, carried about, and tilted to remove solid material deposited within the filter cage. The filter cage is constructed and adapted to be hoisted up out of the container and separately moved about and tilted to remove solids deposited within the filter cage. A liquid injection apparatus may be provided for injecting a selected amount of a flocculating agent into the slurry received into the container to cause flocculation of solid particles in the slurry. Also discloses the steps of the method of extracting liquid from a slurry and disposing the remaining solids.
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