Apparatus and a method for the dehydratation treatment of waste sludge

An apparatus for treating waste sludge, comprising:

• a hollow outer container casing;
• an inner body which is coaxial to the outer container casing;
• a compacting and dehydrating chamber inside the outer container casing and extending along a longitudinal length of the apparatus through which the waste sludge to be treated runs;
• an inlet zone that supplies the waste sludge to be treated to a receiving portion of the compacting and dehydrating chamber;
• an outlet zone, at an exit portion of the compacting and dehydrating chamber, that unloads sludge that has been treated by the compacting and dehydrating chamber;
• a mechanical device inside the inner body that, in cooperation with the inner body, causes advancement, mixing and compacting of the waste sludge from the inlet zone to the outlet zone;
• and
• a filter disposed inside the outer container casing and delimiting the compacting and dehydrating chamber, the filter being provided with at least a container net which is connected to a negative pole in order to operate as a cathode, and at least the inner body being connected to a positive pole in order to operate as an anode,
• wherein a potential difference established between the anode and the cathode subjects the waste sludge to an electrical field in order to realize an electro-osmotic process,
• wherein the compacting and dehydrating chamber is peripherally delimited by the filter which is arranged so as to realize a plurality of conical walls,
• wherein an outer impeller and an inner impeller are provided inside the compacting and dehydrating chamber, said outer impeller and said inner impeller being connected to the positive pole,
• the outer impeller and the inner impeller being wound in opposite directions,
• the inner impeller operating inside a first of the conical walls of the filter, and the outer impeller operating outside a second of the conical walls of the filter, and
• the compacting and dehydrating chamber being closed at a first end, at which the walls of the filter are closer to one another than at an opposite second end,
• wherein the inlet zone and the outlet zone are arranged concentrically to each other, and
• wherein the inlet zone and the outlet zone are both located opposite to the first end at which the compacting and dehydrating chamber is closed.

An apparatus for treating waste sludge, comprising:

• a first tract and a second tract, each tract comprising:
• an hollow outer container casing;
• an inner body inside and coaxial to the outer container casing;
• a compacting and dehydrating chamber inside the outer container casing and extending along a longitudinal length of the apparatus through which the waste sludge to be treated runs;
• an inlet zone that supplies the waste sludge to be treated to a receiving portion of the compacting and dehydrating chamber;
• an outlet zone, at an exit portion of the compacting and dehydrating chamber, that unloads sludge that has been treated by the compacting and dehydrating chamber;
• a mechanical device inside the inner body that, in cooperation with the inner body, causes advancement, mixing and compacting of the waste sludge from the inlet zone to the outlet zone;
• and
• a filter disposed inside the outer container casing and delimiting the compacting and dehydrating chamber, the filter being provided with at least a container net which is connected to a negative pole in order to operate as a cathode, and at least the inner body being connected to a positive pole in order to operate as an anode,
• wherein a potential difference established between the anode and the cathode subjects the waste sludge to an electrical field in order to realize an electro-osmotic process, and
• wherein the longitudinal length of the first tract is inclined upward to a horizontal axis in order to enable outlet of water, and the longitudinal length of the second tract extends along a vertical axis.