Rake systems for cleaning water streams and new and novel components for such rake systems.

A conveyor-belt filtering device includes an endless filtering belt, which has at least one filtering element, a frame, a lower deflection apparatus and at least one upper deflection apparatus. The endless filtering belt has at least one collecting element, which is adapted for collecting foreign solids, in particular sand, stones, pebbles or the like, which are present in the liquid, in particular in an area of the lower deflection apparatus.

A method may include providing a rake system with a framework, a chain having a plurality of skimmers, an elongated rail, a first support arm, a second support arm, a first guide device, a second guide device, and/or a screen, rotating the chain, receiving debris between the chain and the screen, and/or moving the debris along the screen, via a skimmer of the plurality of skimmers, to discard the debris.

Water or wastewater filtration systems and processes have a filter tank having a floor and sidewall defining a filtration zone, an influent conduit, and an effluent conduit. One or more filtration members in the tank having filter media, and one or more cleaning members adjacent at least some portions of the filter media. Generating an effluent stream by generating a pressure differential across submerged portions of the filtration media, causing water in the influent to flow from outside to inside the submerged portions of the filter media. A prime mover rotates the filtration members. A blower and chamber for creating a reduced pressure condition in each of the cleaning members when they are non-submerged, the chamber receiving wet solids removed from non-submerged, wet solids-laden portions of the filter media by the non-submerged cleaning members subsequent to submerged, fouled portions of the filter media being rotated out of the filtration zone.

Water or wastewater filtration systems and processes have a filter tank having a floor and sidewall defining a filtration zone, an influent conduit, and an effluent conduit. One or more filtration members in the tank having filter media, and one or more cleaning apparatus adjacent at least some portions of the filter media. Generating an effluent stream by generating a pressure differential across submerged portions of the filtration media, causing water in the influent to flow from outside to inside the submerged portions of the filter media. A prime mover rotates the filtration members. A blower and chamber for creating a reduced pressure condition in each cleaning apparatus when they are non-submerged, the chamber receiving wet solids removed from non-submerged, wet solids-laden portions of the filter media by the non-submerged cleaning apparatus subsequent to submerged, fouled portions of the filter media being rotated out of the filtration zone. The non-submerged filter media from which wet solids have been removed is further cleansed of collected solids and entrapped water employing air drawn from inside of the one or more drum filters by the blower.

A backwashing suction device for a fabric filtration apparatus, and more particularly, a backwashing suction device for a fabric filtration apparatus in which an edge surface of a suction slit through which pile threads exit is inclined to form a slope so that the pile threads introduced into the suction slit when a fiber disk filter is rotated for backwashing come into contact with the slope and thus the amount of angular rotation of the pile threads is increased to increase the backwashing effect. Also, since a plurality of friction protrusions are formed to protrude from the slope, the effect of removing foreign substances can be further enhanced through the effect of rubbing and washing the pile threads on a washboard while the pile threads ascend over each of the friction protrusions one by one.

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.

An incised surface is formed in one surface of a suction plate on the basis of a slit and a pattern roller is placed in a room, which is provided at a thickness part of the slit in which the incised surface is formed, to rotate in place so that the pattern roller partially protrudes outward from the incised surface and forms patterns on a surface of fleeces which are backwashed while passing through the slit so as to increase a filtration area of the fleeces. The backwash may be performed and the filtration area of the fleeces may be increased using the room. The spline-shaped patterns including splines cut to a certain length, patterns including several annular protrusions formed on an outer circumference of the pattern roller, spline-shaped patterns formed on the outer circumference, lattice-shaped patterns, and the like may be formed on a surface of the pattern roller.

A brine injection system with a plurality of needles, which are inserted into a product and through which brine is injected into the product. Brine which does not end up in the product is collected and recycled, and during recycling, the brine flows through a filter. The filter includes a filter element, along which unfiltered brine flows in a flow-direction and through which filtered brine passes and which holds back residues in the unfiltered brine. The filter element includes a multitude of slots, each with a main extension direction which extends parallel to the flow direction of the brine.