Abstract: A sludge filtration apparatus has a sludge tank configured to store sludge and at least one filter assembly. The filter assembly includes a filtration membrane for filtering the sludge and a pipe insertable in the filtration membrane to supply air to a secondary side of the filtration membrane for dislodging the sludge from the filtration membrane. The pipe has a plurality of holes for discharging gas, namely air, to an area in which the filtration membrane inclines downwardly with the secondary side thereof. The sludge filtration apparatus can prevent thickened sludge from remaining in an upper portion of the filter assembly.

Abstract: A sludge filtration apparatus has a sludge tank configured to store sludge and at least one filter assembly. The filter assembly includes a filtration membrane for filtering the sludge and a pipe insertable in the filtration membrane to supply air to a secondary side of the filtration membrane for dislodging the sludge from the filtration membrane. The pipe has a plurality of holes for discharging gas, namely air, to an area in which the filtration membrane inclines downwardly with the secondary side thereof. The sludge filtration apparatus can prevent thickened sludge from remaining in an upper portion of the filter assembly.

Abstract: A method and apparatus for processing sludge, which utilizes filter plates and flow regulating means to form condensed sludge of higher concentration, have been developed. The filter plates are disposed within a sludge tank and noncondensed sludge is added to the sludge tank to completely cover the filter plates. Filtrate is then removed from the sludge tank by the filtrate extraction means via the permeable walls of the filter plates. As the filtrate passes through the permeable walls a first condensed sludge forms on the filter plates. After first condensed sludge is formed on the filter plates, a flow regulating means is operated to form second condensed sludge, an even higher concentrations of condensed sludge.

Abstract: In an electro-endosmosis type dehydrator in which the voltage of an electric power source 6 is applied across a rotary drum 1 having electrodes on the cylindrical wall and a press belt 3 confronted through a sludge passageway 4 with the cylindrical wall of the rotary drum, and water contained in the sludge 8 supplied to the sludge passageway is collected on the side of the press belt and discharged therefrom. The electrodes (or electrode assembly 2) on the rotary drum are a plurality of wire electrodes 22 which are arranged on the cylindrical wall of the rotary drum in such a manner that they are in parallel with one another with degasifying slits therebetween, whereby the gas produced on the side of the rotary drum by electrolysis of the sludge during electroendosmosis dehydration is quickly discharge out of the system through the degasifying slits.

Abstract: An electroosmotic dewaterer for dehydrating a liquid mud by supplying the liquid mud into a space between facing anode and cathode electrodes, applying d.c. voltage across said electrodes so as to gather the water content of the liquid mud to the cathode electrode by means of electroosmotic action and filtering the liquid through a filtering medium, wherein the cathode electrode is equipped with means for removing a deposit formed on the surface thereof while the dehydrating operation is carried out.