Abstract: Various examples related to electrokinetic dewatering (EKD) of suspensions such as, e.g., phosphatic clay suspensions are provided. In one example, a system for continuous EKD includes cake dewatering unit having a lower conveying belt extending across a dewatering chamber; an upper conveying belt extending across at least a portion of the dewatering chamber; and a sludge inlet configured to supply a sludge suspension on the first end of the lower conveying belt. The conveying belts can extend across the dewatering chamber at an angle. Rotation of the conveying belts draws the sludge suspension through an electric field where the sludge suspension is dewatered. The electric field can be established between an upper anode and a lower cathode. The upper and lower conveying belts can include the anode and cathode. A suspension thickening unit can provide a thickened sludge suspension the cake dewatering unit for enhanced dewatering.

Abstract: Various methods and systems are provided for electrokinetic dewatering of suspensions such as, e.g., phosphatic clay. In one example, among others, a system for continuous dewatering includes a cake formation zone including a first anode and a first cathode each extending across a first portion of a separation chamber; a cake dewatering zone including a second anode and a second cathode; an inlet configured to supply a dilute feed suspension comprising solids suspended in water to the cake formation zone; and a conveying belt extending between the first anode and the first cathode and between the second anode and the second cathode. A first electric field between the first anode and the first cathode forms a cake on the conveying belt by consolidating the solids, and a second electric field between the second anode and the second cathode dewaters the cake on the conveying belt.

Abstract: The present invention relates to a process, and respective operating apparatus, for modifying the structure of a sludge, in particular an organic sludge originating from a purification treatment of waste water, of the civil and industrial type, to be subjected to dehydration and/or drying, wherein the sludge is exposed to the action of an electric field generated by direct current.

Abstract: Provided is an electro-osmosis dehydrator, which includes a sludge supplying part disposed in a central upper portion thereof, and including a rotating part and two rollers disposed under the rotating part, a drum disposed under the sludge supplying part to receive sludge, and having a cylindrical shape rotating about an axis thereof, wherein an inner circumference of the drum is charged negatively or positively by direct current power, a caterpillar part spaced a certain distance from the drum, and moving along an endless track, wherein the caterpillar part includes a power applying part charged with polarity opposite to that of the drum by direct current power, a filtering fabric disposed under the power applying part, a caterpillar disposed under the filtering fabric, and including a plurality of holes, a vinyl part disposed between the filtering fabric and the caterpillar to prevent the sludge from passing through the caterpillar, and a chain disposed under the caterpillar, and a plurality of idle sprocke

Abstract: Disclosed is an electro-penetrative type sludge weight reducing apparatus, which can uniformly dehydrate sludge by gradually applying the same pressure over an entire surface of the sludge and applying the same voltage to the sludge and includes a sludge supplier, which can minutely and precisely control a compression height for the sludge according to characteristics and a thickness of the sludge and maximize a moisture reducing efficiency of the sludge by uniformly supplying the sludge having a desired thickness to an entire width of a conveyor belt and an electrode plate with improved insulation safety.

Abstract: There are provided apparatuses for increasing dryness of a substance. The apparatuses comprise at least one module, each of the module(s) comprising at least two electrodes adapted to submit the substance to an electric current. The electrodes are also adapted to compress the substance. There are also provided processes for increasing dryness of a substance.

Abstract: The present invention relates to a system and a method for the concentration of slurry, especially mineral containing slurry. The invention provides a system comprising an electrophoresis unit and a separation unit, where the separation unit comprises a recipient, preferably of half cylindrical form, with adjusted flanks for separating the solid material or cake from the rotating anodes and a sliding carriage suitable for closing the recipient and stripping resting solid material from the flanks into the recipient before the solid material or cake is pressed out of the recipient by a piston.

Abstract: There are provided apparatuses for increasing dryness of a substance. The apparatuses comprise at least one module, each of the module(s) comprising at least two electrodes adapted to submit the substance to an electric current. The electrodes are also adapted to compress the substance. There are also provided processes for increasing dryness of a substance.

Abstract: The present invention relates to An electronic osmotic dehydrator of electrophoresis style with a phase control using three-phase current, and more specifically, to An electronic osmotic dehydrator of electrophoresis style with a phase control using three-phase current, which can minimize an unnecessary loss of power consumed in the rotating drum itself by emboding the applying structure of the DC power supplied to the dehydrating domain of the electro-osmotic dehydrator so that a strength of the electric field generated between the rotating drum and the caterpillar may be variably controlled depending upon a sludge volume, and improving a structure of the rotating drum to which the DC power is applied, when forming an electronic osmotic dehydrator comprising a rotating drum in the cylindrical form, a caterpillar running on an endless track at a certain space from the rotating drum and two filter cloth belts for transferring and dehydrating the sludge as wound between the drum and the caterpillar, which is a

Abstract: The present invention relates to an electroosmotic dehydrator, and more specifically to an electroosmotic dehydrator having a structure of improving durability and electrical conductivity of a drum that is a core part of the electroosmotic dehydrator, making it possible to secure stable dehydrating work, extend use lifetime, and reduce power consumption. According to the present invention, An electroosmotic dehydrator comprising: a drum applied with + or ?; a caterpillar or an electrode plate applied with + or ? by being mounted to be spaced by a constant space portion from the drum; and a filter cloth belt wound for transfer and dehydration of sludge between the drum and the caterpillar or the electrode plate, characterized in that a copper plate is mounted to an outer side surface of the drum and a titanium plate is coated with a coating agent of platinum-based metal to an outer side surface of the copper plate.

Abstract: It is an object of the present invention to provide an improved method of electro-dewatering substances by increasing the efficiency with which water is removed from the substances, thus permitting substances to attain higher dryness levels with the same energy input and surface area, or to attain similar dryness levels with less energy input or less surface area.

Abstract: An apparatus and method for reducing the liquid content of a particulate/liquid dispersion, such as a sewage sludge or mine tailings, are described. The apparatus comprises containment means to contain the material, and means to apply pressure to the contained material therein, the containment means being partly defined by a first filtration membrane permeable to the liquid but impermeable to at least some and more preferably substantially all of the solids contained within the material, in particular configured as a continuous belt press. The filtration membrane comprises a textile or other synthetic material in intimate association with a conducting element so as to constitute where so associated a first electrode. A second sheet material, preferably also a filtration membrane, is similarly associated with a conducting element so as to constitute a second electrode to allow application of a potential difference across the material and drive the dewatering process electrokinetically.

Abstract: An apparatus and method for removing contaminant species from water by electrocoagulation are described. Alternating grounded, rotating, planar circular electrodes and stationary planar electrodes function as a Tesla fluid pump when placed in contact with the contaminated water, causing the water to flow between the rotating and stationary electrodes. An insoluble abrasive material introduced into the water removes scale from the electrodes while the water is pumped thereby. A direct electric current is caused to flow between each pair of rotating and stationary electrodes, thereby producing electrocoagulation of the contaminants in the water flowing therebetween. The electrocoagulated materials may be separated from the treated water by filtration or by permitting the treated water to stand for a chosen period.

Abstract: An apparatus for electrophoretically removing contaminants from an oil-based drilling fluid includes a housing, a drum, a means for rotating the drum, and a scraper head. The drum is retained within the housing above the housing floor. The oil-based drilling fluid is directed along the housing floor, contacting both the housing floor and the drum. A negative charge is applied to the drum and a positive charge is applied to the housing, creating an electrical field through the fluid. Drilling fluid contaminants are attracted to and collect upon the drum outer surface. The means for rotating the drum turns the drum through the fluid and collected contaminants remain on the drum outer surface. The scraper removes the collected contaminants from the drum outer surface as it rotates.

Abstract: The present invention relates to an apparatus for treating sludge comprising electrodes including at least one anode and at least one cathode. The electrodes define therebetween a space adapted to receive the sludge so as to submit the sludge disposed within the space to an electric current, thereby dehydrating the sludge and generating an effluent. The apparatus also comprises an inlet for receiving the sludge and an outlet for evacuating the treated sludge. The inlet and the outlet are in communication with the space. The apparatus also comprises compression means for compacting the sludge so as to permit a contact substantially constant between the electrodes and the sludge when the sludge is submitted to the electric current and rotated around a rotation axis. The invention also relates to a process for treating sludge. The invention is useful for treating various types of sludge in order to dehydrate and decontaminate the sludge.

Abstract: A continuous purification method for removing neutral, as well as ionic, contaminants from liquid toner in an electrostatic printing system is disclosed. This method involves circulating liquid toner from a toner supply tank through a common volume which includes the toning applicator. The liquid toner is introduced to solid and ionic contaminants in the common volume and as the toner is circulated back to the toner supply tank for each toning pass, some contaminants and toner are left in the common volume. Next a wash fluid from a wash fluid supply tank is circulated through the common volume after each toning pass, the wash fluid mixing with the toner and the contaminants. This mixture is then passed through an electrophoretic purifier to remove the contaminants. Then the mixture passes through a porous particulate filter to remove any remaining contaminants before it returns back to the wash fluid supply tank.