A method for unclogging the openwork sheath of screw extruders used for sludge densification. The sheath is formed by a stack of superposed elements that are spaced apart from one another by elastic spacers, the latter creating a gap between each of the elements. The liquid and gaseous fractions contained in the sludge are expelled through the gaps. The stack is compressed during an extrusion cycle, with the spacers thus being squashed, thereby reducing the thickness of the gaps. During an unclogging cycle, the pressure is released, the spacers then returning to their original thicknesses and in this way increasing the size of the gaps, thus making it easier to unclog the latter.

A method for unclogging the openwork sheath of screw extruders used for sludge densification. The sheath is formed by a stack of superposed elements that are spaced apart from one another by elastic spacers, the latter creating a gap between each of the elements. The liquid and gaseous fractions contained in the sludge are expelled through the gaps. The stack is compressed during an extrusion cycle, with the spacers thus being squashed, thereby reducing the thickness of the gaps. During an unclogging cycle, the pressure is released, the spacers then returning to their original thicknesses and in this way increasing the size of the gaps, thus making it easier to unclog the latter.

A filtration apparatus is provided. The filtration apparatus includes a housing and a plurality of filtering sheets. The housing is enclosed by a first end cap and a second end cap. The first end cap includes a liquid inlet, and the second end cap includes a liquid outlet. The plurality of filtering sheets is disposed on an internal sidewall of the housing. A portion of the filtering sheets interlaces with another portion of the filtering sheets to form a winding flow path in the housing.

A filtration apparatus is provided. The filtration apparatus includes a housing and a plurality of filtering sheets. The housing is enclosed by a first end cap and a second end cap. The first end cap includes a liquid inlet, and the second end cap includes a liquid outlet. The plurality of filtering sheets is disposed on an internal sidewall of the housing. A portion of the filtering sheets interlaces with another portion of the filtering sheets to form a winding flow path in the housing.

This disclosure relates a fluid filter whose pores are created by raised structures on a base. The raised structures may be macro, micro and/or nanometer scale structures. The structures can be configured in myriad ways to control flow rate and extracted particle size of a filtering system. Typically a plurality of filter panels will be stacked to form a filtering unit.

This disclosure relates a fluid filter whose pores are created by raised structures on a base. The raised structures may be macro, micro and/or nanometer scale structures. The structures can be configured in myriad ways to control flow rate and extracted particle size of a filtering system. Typically a plurality of filter panels will be stacked to form a filtering unit.

The invention relates to a filter element comprising one or more fluid-pervious layers of a fluid-pervious sheet material having first and second surfaces in a substantially parallel arrangement, a fluid-impervious layer arranged in fluid tight contact with at least one of said first and second surfaces of said layer(s) of fluid-pervious sheet material to substantially fully cover the first and/or second surfaces thereof, one or more first and second edge portions, said first and second edge portions being arranged at a predefined distance and separated from one another by a predefined area of the fluid-pervious sheet material, a fluid flow path limited to and extending essentially parallel to the first and second surfaces from the first edge portion(s) to the second edge portion(s) within each of said layers of fluid-pervious sheet material, said first and second edge portions providing a fluid intake and a fluid drainage at the upstream and downstream ends of said fluid flow path, respectively. The invention further relates to filter modules comprising one or more of said filter elements.

The invention relates to a filter element comprising one or more fluid-pervious layers of a fluid-pervious sheet material having first and second surfaces in a substantially parallel arrangement, a fluid-impervious layer arranged in fluid tight contact with at least one of said first and second surfaces of said layer(s) of fluid-pervious sheet material to substantially fully cover the first and/or second surfaces thereof, one or more first and second edge portions, said first and second edge portions being arranged at a predefined distance and separated from one another by a predefined area of the fluid-pervious sheet material, a fluid flow path limited to and extending essentially parallel to the first and second surfaces from the first edge portion(s) to the second edge portion(s) within each of said layers of fluid-pervious sheet material, said first and second edge portions providing a fluid intake and a fluid drainage at the upstream and downstream ends of said fluid flow path, respectively. The invention further relates to filter modules comprising one or more of said filter elements.

A filter moving device is disclosed that is designed to lift and move a filter cartridge stack comprised of individual filter cartridges. The filter cartridge stack, for instance, may comprise a plurality of disk-shaped filter cartridges. The filter moving device is designed to be placed over the stack. The device includes lifting elements that engage the stack for removing the stack from a filter assembly and/or installing the stack in a filter assembly.

A self-cleaning disc filter apparatus for filtering a liquid, water, utilizing a plurality of stackable/de-stackable disc filter media within a filtering housing, the liquid flows through the housing in two flow directions, a first flow direction during a filtering phase and a second direction of flow during a self-cleaning phase; the filtering housing is fit with an internal fluid diverter that controls the direction of flow through the filter housing, the status of the filtering media, initiating filter media cleaning, therein the internal fluid diverter control the overall status of the filter apparatus, the internal fluid diverter is configured to change between filtering phase and self-cleaning phase with a single turn of the fluid diverter.