Recessed Plate Filter Press
In the recessed type of press the recess is formed by a raised rim which stands above the drainage surface and the thickness of cake formed therefore twice the depth of the recess on individual plates. The slurry to be filtered is normally fed into the filter press through a central hole that feeds each chamber at the same time. The solids are retained within the recessed hollow chamber and the filtrate passes through the media into an internal manifold or away through drain cocks or directional bibs.
Plate and Frame Filter Press
In the plate and frame type of press the chambers are formed by the use of a hollow frame which is placed between two plates whose rim or joint surfaces are nearly flush with their drainage surfaces. The slurry to be filtered is fed into the press through a manifold formed by ports in each plate and frame and delivered into each frame by suitable connecting ports. The solids are retained within the hollow frame whilst filtrate delivers through the media into a collection manifold by way of additional ports in the plates or through drain cocks or directional bibs.
Membrane Plate Filter Press
The membrane system has proved to be useful in certain applications, typical of which are the filtration of dyes, pigments and yeast slurries.
1. 630 x 630mm square, recessed plate filter press used for dewatering metal hydroxide sludges from a plating shop effluent treatment plant
2. 800 x 800mm square, recessed membrane plate filter press used in filtration of fermenting vessel bottoms on a brewery installation.
3. 1500 x 1500mm square, recessed plate filter presses used for treatment of drinking water in a large Scottish town.