Abstract: The invention relates to a vertical agitator for wastewater and the like received in a sedimentation tank, wherein an agitator tool (5) is mounted on a drive shaft (4) extending vertically from a drive (1) mounted above a tank floor (2), wherein a free end (E2) of a shaft section (7) extending from the agitator tool (5) in the direction of the tank floor (2) is held in a safety bearing (14), wherein the safety bearing (14) is held in a retaining device (8) supported on the tank floor (2), wherein the retaining device (8) comprises a receiving section (9) for a receiving device (12) receiving the safety bearing (14). In order to simplify installation, the invention proposes that the receiving section (9) comprises a recess (11) opening in a substantially horizontal direction for laterally inserting the shaft section (7).

Abstract: The invention relates to a method for biologically cleaning wastewater (A), comprising the following steps: providing a treatment basin (B) having a floor (1) and at least one wall (2) extending from the floor at a wall height (W), having an inlet opening (3) and having at least one outflow opening (9) in the range from 0 to a maximum of 0.5 times the wall height (W), feeding the wastewater (A) through the inlet opening (3) into the treatment basin (B), bringing the wastewater (A) into contact with microorganisms seeded in loose growth bodies (12) received in the treatment basin (B), and discharging the wastewater (A) at least partially cleaned by the action of the microorganisms from the treatment basin (B) through the outflow opening (9), wherein the growth bodies (12) are retained in the treatment basin (B).

Abstract: The invention relates to a device for cleaning wastewater, wherein at least one flow channel (S, S1, S2) having at least one horizontal agitator (5) disposed therein in the treatment basin (B), and wherein a cross-sectional surface (Q) of the flow channel (S, S1, S2) extending perpendicularly to the flow direction (SR) increases steadily upstream and downstream from the horizontal agitator (5).

Abstract: The invention relates to a horizontal agitator for producing a flow in a clearing basin, wherein a propeller (2) having a plurality of blades (4) is connected to a submersible motor (1) axially disposed thereto. In order to increase the efficiency of the horizontal agitator, according to the invention the propeller (2) and the submersible motor (1) are configured such that during operation of the submersible motor (1) a flow (P2) that is directed from the propeller (2) to the submersible motor (1) is produced.

Abstract: The invention relates to a decanter for separating a supernatant protruding from a sewage sludge in a sludge tank (1) having a withdrawal device (4) attached to a first end (E1) of a pivot-mounted discharge pipe (3), wherein for discharging the supernatant flowing through the discharge pipe (3) near a second end (E2) opposite of the withdrawal device (4) a flexible hose (14) is provided, which is connected to a connecting piece (13) that is firmly mounted to the base relative to the pivoting bearing. In order to improve the robustness of the decanter, the invention provides that the discharge pipe (3) is received at its second end (E2) pivoting around a pivoting axis (A) in a pivoting bearing (2) having two bearing blocks (17) supported on a base.

Abstract: The invention relates to a drive device for the immersed operation below a surface of a liquid (F), particularly for the immersed operation in a clearing basin, having a drive shaft (5) guided out of a housing, wherein the drive shaft (5) is guided through an axial face seal (12, 13) received in a sealing chamber (10) for sealing the housing against penetrating liquid. In order to improve the service life of the seal, the invention provides that a line (22) is connected to the sealing chamber (10) for receiving an oil supply and is guided to above the surface of the liquid (F).

Abstract: The invention relates to an agitating device, in which a hyperboloid agitating body (6) is connected to a drive mechanism (2, 3) by means of a shaft (4). Several ribs (7) running from the circumferential boundary (Ur) in the direction of the shaft (4) are provided on the upper side (O) of the agitating body (6). According to the invention, the efficiency of the agitating device may be improved, whereby a height (h1) of the ribs (7) at least incrementally increases from the circumferential boundary (Ur) of the agitating body (6) in the direction of the shaft (4).

Abstract: The invention relates to a stirring device for activated sludges comprising a stirring body (2) attached to a shaft (1) and having a hyperboloid wall (3), further comprising an air supply line (5, 8) for supplying air to a funnel-like recess (6) formed on a bottom of the stirring body (2). In order to improve the entry of air into the fluid medium surrounding the stirring body (2), the invention provides for an opening of the recess (6) formed on the bottom be covered with a covering element (7) such that an annular gap (10) having a predetermined width remains uncovered between an outer circumferential surface (9) of the stirring body (2) and the covering element (7) and for the air supply line (8) to be guided coaxially through the cover element (7) relative to the shaft (1).

Abstract: The invention relates to a stirring device for activated sludges comprising a hyperboloid stirring body (1) attached to a shaft (2), wherein a plurality of transport ribs (3) are provided on the top (O) of the stirring body (1) running toward the circumferential boundary (UM) thereof, wherein the transport ribs (3) have an oblique course, at least in sections, relative to a radial direction, and wherein the oblique position of the transport ribs (3) is selected such that, when the stirring body (1) rotates in a predetermined rotational direction (R), a flow (S) is generated that is directed outward away from the circumferential boundary (UM) of the stirring body (1).

Abstract: The invention relates to a stirring device for activated sludges comprising a hyperboloid stirring body (2) attached to a shaft (1), wherein a plurality of transport ribs (3) are provided on the top (O) of the stirring body (2) running toward the circumferential boundary (UM) thereof, wherein the transport ribs (3) have an oblique course, at least in sections, relative to a radial direction, and wherein an oblique position of the transport ribs (3) is selected such that, when the stirring body (2) rotates in a predetermined rotational direction (R), a flow is generated that is directed radially outward away from the circumferential boundary (UM) of the stirring body (2). In order to improve the efficiency of the stirring device, the invention proposes that at least one propeller (6) be attached to the shaft (1) that, when the stirring body (2) rotates in the rotational direction (R), generates a flow (A) directed toward the top (O) of the stirring body (2).

Abstract: The invention relates to a device for gassing liquids, particularly waste water, including a gas supply line (1) and at least one gassing element (2), which has a longitudinal axis (L) and can be attached to the gas supply line in a positive manner. In order to simplify the mounting of the gassing element (2), the invention provides that the gassing element (2) has at least one fixing plate (8), which laterally projects relative to the longitudinal axis (L) and which serves to establish a non-positive connection with the gas supply line (1).

Abstract: The invention relates to a horizontal agitator for producing a flow in a clearing basin, wherein a propeller (2) comprising a plurality of blades (4) is connected to a submersible motor (1) disposed axially thereto. In order to increase the efficiency of the horizontal agitator, according to the invention plate-shaped flow conducting elements (8) extending in at least one axial plane are provided downstream of the propeller (2).

Abstract: The invention relates to a horizontal agitator for producing a flow in a clearing basin, wherein a propeller (2) having a plurality of blades (4) is connected to a submersible motor (1) axially disposed thereto. In order to increase the efficiency of the horizontal agitator, according to the invention the propeller (2) and the submersible motor (1) are configured such that during operation of the submersible motor (1) a flow (P2) that is directed from the propeller (2) to the submersible motor (1) is produced.

Abstract: The invention relates to a decanter for separating a supernatant protruding from a sewage sludge in a sludge tank (1) having a withdrawal device (4) attached to a first end (E1) of a pivot-mounted discharge pipe (3), wherein for discharging the supernatant flowing through the discharge pipe (3) near a second end (E2) opposite of the withdrawal device (4) a flexible hose (14) is provided, which is connected to a connecting piece (13) that is firmly mounted to the base relative to the pivoting bearing. In order to improve the robustness of the decanter, the invention provides that the discharge pipe (3) is received at its second end (E2) pivoting around a pivoting axis (A) in a pivoting bearing (2) having two bearing blocks (17) supported on a base.

Abstract: The invention relates to an agitating device, in which a hyperboloid agitating body (6) is connected to a drive mechanism (2, 3) by means of a shaft (4). Several ribs (7) running from the circumferential boundary (Ur) in the direction of the shaft (4) are provided on the upper side (0) of the agitating body (6). According to the invention, the efficiency of the agitating device may be improved, whereby a height (h1) of the ribs (7) at least incrementally increases from the circumferential boundary (Ur) of the agitating body (6) in the direction of the shaft (4).