A rotating drum screen method for separating solids from thin stillage obtained from ethanol fermentation, the thin stillage comprising one or more of solids and suspended solids. Thin stillage is chemically treated with an anionic polymer to form stable particles of one or more of solids and suspended solids. Introducing the treated thin stillage into a rotating drum screen system. The drum screen includes a filter screen that retains at least a portion of the solids within a hollow portion of the drum screen and which produces a liquid effluent that is discharged from an outer surface of the drum screen. The retained solids are removable from the drum screen via a solid discharge end. A head box is disposed within the hollow portion of the drum screen and has a plurality of fluid flow channel dividers dividing and directing an influent stream outwardly against the drum screen.

A food processing water filtration apparatus includes a rotatable drum, a source of liquid, a blade to remove solids from the drum, a drain, and a rotational drive. The system has one or more of a plurality of flights affixed to the drum, a source of mixing gas connected to the source of liquid, a source of cleaning gas connected to nozzles disposed inside the drum, and a trunnion support for an end of the drum. The drum is cylindrical and at least partially comprised of a screen. The source of liquid directs liquid towards the screen and into the drum. The drain collects at least a second portion of the liquid that passes through the screen and out of the drum. The outlet is at one or both ends of the drum. The rotational drive is connected to an end(s) of the drum, and rotates the drum.

A food processing water filtration apparatus includes a rotatable drum, a source of liquid, a blade to remove solids from the drum, a drain, and a rotational drive. The system has one or more of a plurality of flights affixed to the drum, a source of mixing gas connected to the source of liquid, a source of cleaning gas connected to nozzles disposed inside the drum, and a trunnion support for an end of the drum. The drum is cylindrical and at least partially comprised of a screen. The source of liquid directs liquid towards the screen and into the drum. The drain collects at least a second portion of the liquid that passes through the screen and out of the drum. The outlet is at one or both ends of the drum. The rotational drive is connected to an end(s) of the drum, and rotates the drum.

A screen-type screw centrifuge including a screw drive shaft, a screw hub, a hollow screw main body and a ring-shaped annular-gap cover. At least one axial access channel is formed radially between a screw main body circumferential wall and the annular-gap cover. Using a tool engagement portion of a tightening means, by which the screw main body is fixed to the screw hub with a first screw main body axial end portion thereof, is axially accessible from a second screw main body axial end portion.

A screen-type screw centrifuge including a screw drive shaft, a screw hub, a hollow screw main body and a ring-shaped annular-gap cover. At least one axial access channel is formed radially between a screw main body circumferential wall and the annular-gap cover. Using a tool engagement portion of a tightening means, by which the screw main body is fixed to the screw hub with a first screw main body axial end portion thereof, is axially accessible from a second screw main body axial end portion.

The present invention provides a multi-structure filtration device for filtering, separating, and dehydrating foreign substances in water, the multi-structure filtration device comprising: a filtration tank filled with filtration target fluid inside; a filtration device unit having a cylindrical double drum structure, installed in the filtration tank so that a part of the filtration device unit is submerged in the filtration target fluid, and including two or more filters having different mesh sizes that are respectively wound on an inside and an outside of the filtration device unit, and one or more washing modules washing foreign substances attached to the filter wound on an outside of the filtration device unit. Accordingly, the multi-structure filtration device can have excellent filtration performance by double-filtering the target fluid using two or more filters, can operate in an eco-friendly manner by recycling filtered water and effectively washing the filters using the filtered water without separate chemicals, can increase the durability of the filters, and can reduce the washing and processing cost by reusing the filters.

The present invention provides a multi-structure filtration device for filtering, separating, and dehydrating foreign substances in water, the multi-structure filtration device comprising: a filtration tank filled with filtration target fluid inside; a filtration device unit having a cylindrical double drum structure, installed in the filtration tank so that a part of the filtration device unit is submerged in the filtration target fluid, and including two or more filters having different mesh sizes that are respectively wound on an inside and an outside of the filtration device unit, and one or more washing modules washing foreign substances attached to the filter wound on an outside of the filtration device unit. Accordingly, the multi-structure filtration device can have excellent filtration performance by double-filtering the target fluid using two or more filters, can operate in an eco-friendly manner by recycling filtered water and effectively washing the filters using the filtered water without separate chemicals, can increase the durability of the filters, and can reduce the washing and processing cost by reusing the filters.

A removable filter plate for a rotary drum filter that reduces instances of welding to secure the filter plate to the drum and obviates the need for cap strips. An exemplary filter plate assembly in accordance with this disclosure comprises a filter plate and an engagement assembly, wherein the engager of the engagement assembly is configured to extend in a lateral direction toward the leading end or the trailing end of the filter plate, wherein an extended engager having an engagement end disposed under a shelf of the adjacent top hat mounting assembly defines a closed position, and wherein a retracted engager defines an open position.

The present invention relates to a filtering panel (100) for a disk filter and a disk filter for water purification, comprising a metal filter cloth (16, 116) such as a stainless steel filter cloth, pre-tensioned in both warp and weft directions and fastened to a frame (10, 110) comprising a peripheral portion (11, 111), which is integral with an inner grillwork (12) and which divides the inner area of the peripheral portion (11, 111) into fields (15, 115). The frame (10, 110) comprises a plastic material reinforced with glass fibers or carbon fibres such as polypropylene loaded with fibreglass in an amount of at least 20 weight percent. Each field of the grillwork (12, 112) has an area not exceeding 10% of the inner area of the peripheral portion (11, 111). The pre-tensioning of the filter cloth (16, 116) in both directions is from at least 20% of the yield stress of the cloth (16, 116). Further the present invention relates to a disk filter comprising said filtering panels (100) and method of making said filtering panel (100).

The present invention relates to a filtering panel (100) for a disk filter and a disk filter for water purification, comprising a metal filter cloth (16, 116) such as a stainless steel filter cloth, pre-tensioned in both warp and weft directions and fastened to a frame (10, 110) comprising a peripheral portion (11, 111), which is integral with an inner grillwork (12) and which divides the inner area of the peripheral portion (11, 111) into fields (15, 115). The frame (10, 110) comprises a plastic material reinforced with glass fibers or carbon fibres such as polypropylene loaded with fibreglass in an amount of at least 20 weight percent. Each field of the grillwork (12, 112) has an area not exceeding 10% of the inner area of the peripheral portion (11, 111). The pre-tensioning of the filter cloth (16, 116) in both directions is from at least 20% of the yield stress of the cloth (16, 116). Further the present invention relates to a disk filter comprising said filtering panels (100) and method of making said filtering panel (100).