Abstract: An easily transportable water purification device, comprising a closed tank in which a plate separator is arranged, and between the inlet for the water to be treated and the inlet connection of said tank a tube coalescer is included for obtaining coalescence of particles suspended in the water. Said coalescer is a tube wound around the tank, and in particular an elastic hose, providing impact protection of the tank. Inside said tank additional storage chambers can be provided laterally of the plate separator.

Abstract: A multiphase separator for treating mixtures of more or less immiscible gaseous, liquid and/or solid components, comprising a gas-tight and in particular pressure-proof tank with a horizontal axis in which a cross-flow flare separator is arranged, said tank being, furthermore, provided with connections for supplying a liquid mixture to be treated and for removing separated gaseous, liquid and/or solid components separated therefrom, the plate separator being, in particular, assembled from units adapted to be stacked side by side, behind and/or above one another, said units having such dimensions that they can be introduced into the tank through a manhole.

Abstract: A method and a device for removing suspended particles from a liquid by means of gas-bubble flotation, in which, before the gas-bubble flotation step proper, the liquid is more or less saturated with the gas in one or more preceding gas introduction steps, so as to obtain a longer average life-time of the smaller gas bubbles in the final flotation step.

Abstract: A method for removing suspended particles from a liquid by means of gas-bubble flotation, in which, before the gas-bubble flotation step proper, the liquid is more or less saturated with the gas in one or more preceding gas introduction steps, so as to obtain a longer average life-time of the smaller gas bubbles in the final flotation step.

Abstract: A separation device, comprising an assembly of substantially parallel corrugated plates arranged in a basin at an angle with the horizontal plane, defining therebetween separation passages through which the liquid to be treated is passed as a flow crossing the corrugation axes, so that the components separated from said flow will be removed between the corrugations and transversely to the liquid flow, and shielded from the latter by said corrugations, towards discharge passages at an extremity of said plates, in which passages guiding baffles are provided for suppressing short-circuit flows past the plate assembly. The improvement is that the plates extend up to the lateral walls of the basin, contacting the wall in question in alternating extreme points of the corrugations, the intermediate extreme points in which the separated components are being discharged remaining at a distance from said wall thus providing discharge passages, the guiding baffles being provided in at least a part of the latter.

Abstract: Devices to remove polluting components from waste liquids are usually designed to operate satisfactorily as long as the input flow rate remains less than some maximum allowed value. Greater flow rates will cause inadequate purification and resulting downstream pollution, as well as possible damage to the device. An emergency overflow weir may be provided to divert excessive input flow into a buffer vessel or alternative discharge channel. The weir will divert a part of the excess flow, but the remainder will pass through the device; the relative portions depend on the relative flow resistance of the weir and of the device, respectively. The present invention enhances the flow resistance of the device when the flow rate through it is greater than the maximum allowed value, so that a greater fraction of the excess flow will be diverted by the emergency overflow weir.

Abstract: A method and a device for bringing about particle growth in a flowing liquid by making use of the velocity differences caused by wall friction in a flow duct through which the liquid is caused to flow, which duct is directed at an angle in respect of the vertical direction, and is, in particular, horizontally directed.

Abstract: A method for separating components suspended in a liquid, in which a gas-liquid mixture is pressurised, and then is depressurised just before being introduced in a separation device so as to obtain a substantially colloidal gas bubble mixture, the gas bubbles adhering to particles of the suspended components which are made flotating thereby, the device for executing this method comprising a liquid compression pump, a relief valve, and a nozzle opening into the separation device just behind this nozzle.

Abstract: A device for discharging floating material from a supernatant layer floating on a carrier liquid in which the discharged material is moved along a discharge surface to an overflow. The device includes a carrier positioned above the supernatant layer. Blades are secured to the carrier for immersion in the supernatant layer in moving the layer toward the overflow. Means are further provided to move the carrier such that the blades supported by the carrier undergo movement through a trajectory with the trajectory of each blade or group of blades encompassing only a portion of the total displacement of the floating material by the movement of the carrier.

Abstract: Apparatus for causing coalescence of particles of solid or liquid matter suspended in a carrier liquid which moves in a continuous flow, by generating in said liquid flow velocity gradients so that particles in adjacent flow layers having a small velocity difference can overtake one another and can, thus, coalesce to larger particles, the velocity gradients being controlled in such a manner that the coalescence is not annihilated by shearing forces between adjacent layers, and the liquid flow rate being controlled in such a manner that separation of the coalesced particles will not take place in the device itself.

Abstract: A separation device comprising a tank in which a plate separator assembly is positioned at an angle in respect to the horizontal plane. The tank is subdivided into a supply chamber and a discharge chamber by means of a transverse partition joining the oblique upper wall of the plate assembly near its lower edge. The partition and upper wall of the plate assembly define a triangular space, the supply for the liquid to be treated in the device opening into this space near its lowest point. A plurality of substantially vertical plates is arranged in this triangular space and defines a plurality of passages for the liquid flowing from the supply to the intake end of the separator plate assembly. The vertical plates bring about a transverse velocity gradient in the liquid flowing in these passages, causing coalescence of the particles suspended in the liquid.

Abstract: A compound separation device including at least two separators each comprising a plurality of inclined separation passages defined between inclined corrugated plates or the like, connecting means being provided to interconnect said separators selectively in series or in parallel.

Abstract: For obtaining coalescence of particles suspended in a carrier liquid, a plurality of relatively small bodies are circulated in a closed cycle together with a part of the suspension, and in the narrower interspaces between said bodies and on the surfaces thereof the probability of particles meeting one another is increased. Carrier liquid with suspended coalesced particles is continuously withdrawn from the closed cycle, and fresh liquid is continuously introduced therein, the circulating movement of the bodies being maintained either by the kinetic energy of the introduced liquid or by injecting an auxiliary driving medium into the liquid flow.

Abstract: A cage comprising one or more wire grids for supporting corrugated plates in a device for treating suspensions.

Abstract: An apparatus for bringing about coalescence of particles suspended in a liquid by means of a transverse velocity gradient in the liquid flow in a substantially vertical duct caused by friction against the walls defining said duct, the latter being formed by one or more tube or hose sections, consecutive sections being interconnected by bends, and the cross-section of said duct increasing either gradually or step-wise from the inlet towards the outlet end of said duct.

Abstract: A device for separating floating or precipitating components from a liquid comprising a number of substantially parallel inclined passages between superposed partitions, and provided with additional mutually parallel guiding baffles at least at one extremity of this assembly for guiding the liquid and/or separated components towards the effective part of these passages without restricting the cross-section of the assembly. One or more slotted baffles transversely to these guiding baffles may improve the uniformity of the supplied liquid flow, and the latter may also be supplied by means of a slotted supply duct which is directed transversely to the guiding baffles.

Abstract: An apparatus for bringing about coalescence of particles suspended in a liquid by means of a transverse velocity gradient in the liquid flow in a substantially vertical duct caused by friction against the walls defining said duct, the latter being formed by one or more tube or hose sections, consecutive sections being interconnected by bends, and the cross-section of said duct increasing either gradually or step-wise from the inlet towards the outlet end of said duct.

Abstract: A simple and efficient flow regulator for controlling the discharge from adjoining collecting chambers separated by a partition and including a common wall which includes a disc mounted in the side wall. The axis of rotation of the disc is in general aligned with the partition and the disc includes an opening asymmetrically disposed relative to the axis of rotation. Thus upon rotation of the disc the area of the opening communicating with each chamber is varied to vary the ratio of discharge flow from each chamber. Details of the structure and mounting are described.