Apparatus for dewatering of sludge and similar substances

Apparatus for dewatering of sludge and similar substances comprising:

• pressure plates forming a sludge chamber provided with filter areas and having at least one sludge inlet,
• means connected to said at least one sludge inlet and creating a hydrostatic filtration pressure,
• high pressure generators by which at least one of the pressure plates is movable to decrease the volume of the sludge chamber after achieving a hydrostatic dewatering pressure to create an additional mechanical dewatering pressure,
• a predewatering stage containing filter areas forming a compensation container, and
• a continuous sludge feed to which the predewatering stage is connected, the predewatering stage additionally being connected to the means connected to said at least one sludge inlet and creating the hydrostatic filtration pressure,
• wherein the filter areas of the sludge chamber, for removing filter cake after opening the pressure plates, are movable with respect to the sludge chamber,
• wherein the means connected to said at least one sludge inlet and creating the hydrostatic filtration pressure is at least one container which is variable in volume,
• wherein the sludge passes axially through the at least one container, and
• wherein an axis of the at least one container is congruent with axes of a sludge discharge line of the predewatering stage and of a sludge feed-line of the sludge chamber.