Abstract: A rotary disk filter has a central pipe and multiple filter disks arranged around and connected to the central pipe., wherein each filter disk includes multiple filter modules arranged adjacent to one another in the circumferential direction of the central pipe, each having a base frame and two filter elements, which include a filter surface connected to a filter frame. The base frame and the two filter elements delimit a cavity fluidically connected to the central pipe. The filter frames are detachably connected to both sides of the base frame, and removable from the base frame and replaceable with new filter elements. Each filter module is fixed at the central pipe with a threaded spindle independently of the remaining filter modules, wherein the threaded spindle extends through the filter module in the radial direction with respect to the central pipe.

Abstract: An apparatus for separating out and removing screenings from wastewater includes a screening device having a screen surface through which the wastewater flows during operation of the screening device and screenings carried along in the wastewater are at least intermittently retained. The apparatus includes a sensor and a controller. The sensor monitors the screenings in the area upstream from the screen surface and/or in the area of the screen surface. The controller outputs a message when the screenings have one or several properties which have been defined and have been recognized by the sensor. In addition, a method for operating the apparatus and a system including the apparatus are provided.

Abstract: A screening device for separating out and removing contaminants from wastewater includes two continuous conveyors, which are mounted with clearance from each other. Each has a drive wheel that is guided on a circular path and includes a fixedly situated bar screen, which includes multiple mutually spaced grating bars for removing contaminants from the wastewater. Each bar screen includes multiple clearing elements, which are connected to the conveyor for removing from the bar screen the contaminants that have been separated out by the bar screen. The bar screen forms a fixed screen surface that extends, in the intended installation position of the screening device, essentially in the flow direction of the wastewater reaching the screening device.

Abstract: A grid bar for a screen grid of a screen includes a multiple number of grid bars arranged next to each other and spaced apart from each other, which serves the purpose of separating screening material from a flowing liquid, such as wastewater flowing in a sewer channel. The grid bar includes a plastic reinforced with fibers, whereas at least a part of the fibers extend in a longitudinal direction of the grid bar. A screen includes such a screen grid.

Abstract: An elongated scraper profile is provided, preferably for a dewatering device that serves the purpose of dewatering sludge. The scraper profile features a lip section extending in the direction of the longitudinal extension of the scraper profile, which serves the purpose of scraping sludge components from a screen surface. The scraper profile features a fastening section extending in the direction of the longitudinal extension, which serves the purpose of fixing the scraper profile with the assistance of a retainer assembly. The scraper profile also features an intermediate section connecting the lip section and the fastening section, whereas the intermediate section is flexibly formed in a direction running perpendicular to the longitudinal extension, such that the lip section is moveable in the direction of the fastening section.

Abstract: A method for drying moist material includes supplying the moist material to a feeding unit of a drying plant through a supply pipe; depositing the moist material on a drying surface, while, based on a parameter that depends on the water content of the moist material passing by a sensor at least one of the supply pipe and the feeding unit, continuously regulating a quantity of the moist material being deposited on the drying surface per unit of time; and drying the moist material on the drying surface. A related drying plant dries moist material using a sensor for sensing a parameter of the moist material supplied and varying a quantity of the moist material being deposited on the drying surface per unit of time.

Abstract: A device for removing impurities from a liquid, preferably sewage, includes a pivoted filtering drum having a filtering surface, equipped with a drum drive operatively connected to the filtering drum to turn the filtering drum around a rotating axis. A cleaning system cleans the filtering surface and has a guide and a spray nozzle arrangement movable back and forth along the guide. Cleaning liquid can be sprayed on the filter surface. The spray nozzle arrangement may include at least one carrier movable back and forth along the guide and at least one spray nozzle mounted on the carrier so that it can be moved around an axis. A related method for cleaning a corresponding device is disclosed.

Abstract: A device for separating and removing material to be sieved from flowing liquid includes a screen forming a sieve surface and fixed to a frame with grate bars arranged beside one another and separated from each other. At least one cleaning rake with numerous cleaning prongs can be in a conveying direction along the screen via a drive. When the cleaning prongs pass the screen, they engage at least in sections between adjacent grate bars to remove the material to be sieved and held back by the screen, thereby conveying it towards a discharge. The cleaning prongs may be configured to be movable laterally back and forth with regard to the conveying direction and with regard to the screen.

Abstract: The invention relates to an extrude unit for a dryer (2) for biomass, in particular slurry, wherein the extruder unit (1) has a surface section (4) for the biomass to pass through and a plurality of apertures (3), wherein the extruder unit (1) comprises a base support (5) which is connected by means of a connecting section (6) to a driving element (7) and can be driven by means of the driving element (7) about an axis of rotation (8) and relative to the surface section (4), wherein the base support (5) comprises at least one support arm (9) having at least one scraper blade (10) which during a rotation of the base support (5) follows the shape of the face of the surface section (4) facing the scraper blade (10).

Abstract: The invention refers to a sieve drum for an installation to remove material to be sieved from a liquid, especially sewage (1), in which case the sieve drum (4) has an opening (6) at least in a front side area (5), through which it can be refilled with a liquid that carries the material to be sieved. According to the invention, it is suggested that the sieve drum (4) should comprise a folded sieve wall (9) with many openings (6), in which case the sieve drum (4) has a support structure that fixes the sieve wall (9) exclusively in a clamping way. In addition, an installation to remove material to be sieved from a liquid, especially sewage (1), with a corresponding sieve drum is described.

Abstract: A device for removing floating material from a liquid, especially from sewage, has at least one sieve element shaped like a filter basket, for example, that in a front side has an inlet opening through which liquid can flow into the interior of the sieve element. The device is equipped with a drive so the sieve element can rotate around a rotation axis. A collection device is arranged within the sieve element for collecting the liquid and/or floating material, in which case the collection device is attached to a pumping-out device for the liquid and/or the floating material. A process for removing floating material from a liquid, especially from sewage, uses a sieve device that contains at least one sieve element that may be shaped like a filter basket, for example, and is equipped with a drive so it can rotate around a rotating axis.

Abstract: The invention relates to an extrude unit for a dryer (2) for biomass, in particular slurry, wherein the extruder unit (1) has a surface section (4) for the biomass to pass through and a plurality of apertures (3), wherein the extruder unit (1) comprises a base support (5) which is connected by means of a connecting section (6) to a driving element (7) and can be driven by means of the driving element (7) about an axis of rotation (8) and relative to the surface section (4), wherein the base support (5) comprises at least one support arm (9) having at least one scraper blade (10) which during a rotation of the base support (5) follows the shape of the face of the surface section (4) facing the scraper blade (10).

Abstract: The invention relates to a drying assembly for moist material (1), in particular sewage sludge, having a rooted drying surface (2) for accommodating the moist material (1) during the drying process thereof, and having a transport device (3) which is designed to transport the moist material (1) that is placed on the drying surface (2) in a direction of a first end face (4) of the drying surface (2). According to the invention, the drying assembly comprises a plurality of supply means (5), with the aid of which the moist material (1) can be placed onto the drying surface (2), wherein the supply means (5) are arranged such that said means are distributed between the first end face (4) and a second end face (10) of the drying surface (2), said second end face (10) being located opposite the first end face (4).

Abstract: A method for transferring heat includes flowing a wastewater through a tank and flowing a fluid through a heat exchanger having an outer surface. The method further includes aerating the wastewater to produce a convective flow, contacting the outer surface of the heat exchanger with the convective flow to exchange heat, and cleaning the outer surface of the heat exchanger with the convective flow. A system for transferring heat includes a tank, a heat exchanger with an outer surface disposed in the tank, and a fluid flowing through the heat exchanger. Wastewater located in the tank flows over the outer surface of the heat exchanger, and a diffusion pipe disposed in the tank provides air into the tank to produce a convective flow in the wastewater.

Abstract: This invention refers to a device for separating and removing sieved material from a flowing liquid such as sewage, in which case the device has a sieve grate (1) with a sieve surface with a front side (2) pointing upstream while the device is operating, in which case the device has a supplementary grate (3) in a lower area of the sieve grate (1) placed upstream before the sieve grate (1), in which case the device has a drive (24) and a cleaning rake (4) that can be driven to revolve in a conveying direction with the help of the drive (24), in which case the operating cleaning rake (4) is moveable along at least one partial section of the front side (2) of the sieve grate (1) in order to remove the held-back sieved material and transport it towards a discharge opening (5) and wherein the cleaning rake (4) can be moved along a back side (6) of the supplementary grate (3) pointing downstream while it is moving in order to remove sieved material held back by the supplementary grate (3) and transport it towards a

Abstract: The invention relates to a plant for treating moist organic and/or inorganic material, particularly in the form of sludge, for example sewage sludge, wherein the plant comprises a drying surface for the material to be treated and a transfer station connecting thereto for the at least partially dried material. According to the invention, the plant comprises, downstream from the drying surface, a device for sanitizing the material.

Abstract: The invention refers to a device for removing screenings from liquid flowing in a channel (1), especially from sewage (2), the device comprising a tilted screening drum (4) being at least partly immersed in the liquid, being drivable around a rotating axis with the help of a drive and having an open face (5) on the inflow side, the device further comprising an extractor for the screenings, preferably in form of a screw conveyor (11) or suction device (17), whereas the extractor is arranged at least partially inside the screening drum (4) and comprises a feeding section for the screenings, preferably in form of a feeding funnel (15), that is arranged inside the screening drum (4). According to the invention, it is suggested for the screening drum (4) to have a folded sieve wall (19).

Abstract: The invention refers to a device for removing floating material from a liquid, especially from sewage (2), with at least one sieve element shaped like a filter basket (4), for example, that in a front side has an inlet opening through which liquid can flow into the interior of the sieve element, and is equipped with a drive so the sieve element can rotate around a rotation axis. The invention suggests arranging a collection device (17) within the sieve element for collecting the liquid and/or floating material, in which case the collection device (17) is attached to a pumping-out device (20) for the liquid and/or the floating material. Another object of the invention is a process for removing floating material from a liquid, especially from sewage (2), in which case a sieve device is used that contains at least one sieve element that can be shaped like a filter basket (4), for example, and is equipped with a drive so it can rotate around a rotating axis.

Abstract: The invention refers to a filter segment for use in a filtration device, especially a rotating filter for filtering liquids with a frame element (1) made at least partly of plastic and a filtration surface enclosing it, in which at least a flat filter material (2) spanning the filtration surface is embedded. According to the invention, it is suggested that within the frame element (1) at least one reinforcement (3) is arranged, for example, like a reinforcement frame and/or individual reinforcing elements traversing the entire frame element (1).