Abstract: A container for the filtration of liquid is described, which has a cup and a cover mounted on the cup. The cup is at least partly filled with a filter material and has at least one outlet window for the liquid. The cover has at least one inlet window and at least one outlet window for air, wherein at least the windows have lattice-like structures with lattice openings. The air outlet window has at least one recess extending inward from the plane of the window, which is provided at least partially with at least one lattice structure.

Abstract: A device for treating a liquid, including a container for collecting the liquid to be treated, including a first fastening unit which has the property that the unit develops a force of attraction under the action of a magnet or has the property of a magnet, and a cartridge for treating the liquid and which can be detachably fastened to the container, including a second fastening unit which has the property that the unit develops a force of attraction under the action of a magnet or has the property of a magnet. The first fastening unit and the second fastening unit interact such that the cartridge can be detachably fastened to the container.

Abstract: A container with a cover wall, provided with at least one cover wall region which can be pierced to form a supply opening for supplying a liquid, a bottom wall, provided with at least one bottom wall region which can be pierced to form a discharge opening, at least one first chamber, in which a basic product is present, and a second chamber, in which an adjustment element is arranged that can be displaced from a position of rest to a puncturing position opening the piercable bottom wall region. The adjustment element is provided with at least one through-channel with an inlet opening and with an outlet opening opposite the piercable bottom wall region. The adjustment element is provided with a mixing chamber for mixing the liquid and the basic product. The mixing chamber is in fluid communication with the first chamber in the puncturing position of the adjustment element.

Abstract: A container having a top wall, which has at least one top wall region that can be perforated to form a feed opening for feeding a liquid; a bottom wall, which has at least one bottom wall region that can be perforated to form an outlet opening; and at least one chamber, which is surrounded by chamber walls and in which a base product and an adjustment element are located. The adjustment element is arranged such that it can be moved from an idle position to a working position and, when in the working position, opens at least one chamber wall. A chamber wall has at least one opening, on or in which a component of the adjustment element is detachably fastened when in the idle position. The component of the adjustment element closes the opening in the chamber wall.

Abstract: It is described a method of measurement of the volume VD of the flow-rate of electrically conductive liquids the conductivity of which is at least codetermined by at least one parameter p, wherein the liquid flows through a vessel having a predetermined shape, and wherein the respective filling volume Vo is determined by at least one measured value x, which is measured by an electrical conductivity measuring device comprising electrodes, wherein the vessel is filled in succession and then is emptied through its outlet, through which the filling heights h are constantly changing. At least one reference table comprising calibration measured values xR and filling volumes Vo belonging to them is constructed by means of calibration measurements using several liquid samples, which have different p-values and different filling heights h in the vessel.

Abstract: A conductivity measurement device, at least for the determination of the fill height of electrically conductive liquids. There are provided a measuring element with at least one carrier body and at least two electrodes having a first and a second end and extending in the vertical direction, wherein the electrodes have at least one screened region in the region of the first end and each electrode has at least a first and a second exposed contact surface, each being adjacent to the screened region. A liquid treatment device with such a conductivity measurement device.

Abstract: It is described a method of measurement of the volume VD of the flow-rate of electrically conductive liquids the conductivity of which is at least codetermined by at least one parameter p, wherein the liquid flows through a vessel having a predetermined shape, and wherein the respective filling volume Vo is determined by at least one measured value x, which is measured by an electrical conductivity measuring device comprising electrodes, wherein the vessel is filled in succession and then is emptied through its outlet, through which the filling heights h are constantly changing. At least one reference table comprising calibration measured values xR and filling volumes Vo belonging to them is constructed by means of calibration measurements using several liquid samples, which have different p-values and different filling heights h in the vessel.

Abstract: A container for the filtration of liquid is described, which has a cup and a cover mounted on the cup. The cup is at least partly filled with a filter material and has at least one outlet window for the liquid. The cover has at least one inlet window and at least one outlet window for air, wherein at least the windows have lattice-like structures with lattice openings. The air outlet window has at least one recess extending inward from the plane of the window, which is provided at least partially with at least one lattice structure.

Abstract: The present invention relates to an apparatus and a process for biological wastewater purification. According to the invention an activation tank (10) is provided in which, with feed of a catalyst, wastewater constituents are degraded by degradation means (11), for example microorganisms, suspended in the wastewater. In the activation tank (10) is disposed at least one lamellae pack (50) in or on which the degradation means (11) suspended in the wastewater are separated out by sedimentation to fall as thickened sedimentation means sludge (11′) to the bottom region (15) of the activation tank (10). In the said bottom region (15) of the activation tank (10) is provided forced recirculation (20, 22) of the degradation means, which takes up the thickened degradation means sludge (11′) and recirculates it as suspended degradation means (11) back to the activation tank (10).

Abstract: The present invention relates to an apparatus and a process for biological wastewater purification. According to the invention an activation tank (10) is provided in which, with feed of a catalyst, wastewater constituents are degraded by degradation means (11), for example microorganisms, suspended in the wastewater. In the activation tank (10) is disposed at least one lamellae pack (50) in or on which the degradation means (11) suspended in the wastewater are separated out by sedimentation to fall as thickened sedimentation means sludge (11′) to the bottom region (15) of the activation tank (10). In the said bottom region (15) of the activation tank (10) is provided forced recirculation (20, 22) of the degradation means, which takes up the thickened degradation means sludge (11′) and recirculates it as suspended degradation means (11) back to the activation tank (10).