Abstract: A treatment apparatus of waste water containing oil and fat for grease trap mounted on a grease trap and for decomposing and treating, with an immobilized enzyme, waste oil and fat waste in waste water containing oil and fat within the grease trap, comprising a support plate mounted on the grease trap, an immobilized enzyme holders containing an immobilized enzyme E and through which the waste water containing oil and fat can freely pass, and an agitating means for agitating the waste water containing oil and fat, wherein the immobilized enzyme holders and the agitating means are installed on the support plate.

Abstract: According to the invention, unpurified biodiesel is brought in contact with cellulose-containing material by continuously and/or discontinuously mixing the same in order to eliminate the glycerin and catalyst residues, such as potassium soaps, accumulated during the production of the biodiesel. A system for carrying out said method comprises an agitated sedimentation tank (1) with a conduit (4,5) for delivering purified biodiesel into the agitated sedimentation tank (1) and a conveying device (6) for feeding cellulose-containing material into the agitated sedimentation tank (1). A drive unit (51) for an agitator (50) is disposed in the agitated sedimentation tank (1). A conduit (16, 20) extends from the agitated sedimentation tank (1) to at least one static sedimentation tank (2, 3). A valve (13) via which solid matter can be discharged from the agitated sedimentation tank (1) is mounted in the area of the bottom of the agitated sedimentation tank (1).

Abstract: A method for removing contaminant from feedwater by forming a dispersion comprising bubbles of a treatment gas in a continuous phase comprising feedwater, wherein the bubbles have a mean diameter of less than about 5 ?m and wherein the treatment gas is selected from air, oxygen, and chlorine. A method for removing contaminants from a feedwater by subjecting a fluid mixture comprising feedwater and a treatment gas to a shear rate greater than 20,000 s?1 in a high shear device to produce a dispersion of treatment gas in a continuous phase of the feedwater. A system for treating feedwater to remove contaminants therefrom is also presented, the system comprising at least one high shear mixing device comprising at least one generator comprising a rotor and a stator separated by a shear gap; and a pump configured for delivering feedwater and treatment gas to the high shear mixing device.

Abstract: A method and device for oxidization of materials in supercritical water. The method involves a) introducing a fluid containing water and an oxidizing agent in a ring-shaped area and through a first end of a substantially tube-shaped reactor comprising an external wall and an internal tube, b) heating the fluid in the ring-shaped area, c) introducing the heated fluid into the internal tube and simultaneously introducing material to be treated into said internal tube at a second end of the reactor, d) mixing the fluid and the material to be treated in a first portion of the internal tube, followed by cooling the obtained mixture in a second portion of the internal tube, and e) isobarically discharging the fluid/oxidized material from the internal tube of the reactor.

Abstract: A flush mixing tank is provided with a flocculant mixing section in which a raw water a to be treated is introduced and a flocculant such as known aluminum sulfate or polychlorinated aluminum is injected, and then they are agitated and mixed; and a floc growing section through which flocculant injected water mixed with the flocculant passes, and the flocculant injected water is discharged as a floc treated water, but a water passing member, which is provided with a plurality of water through-holes for promoting the growth of the flocs in the flocculant injected water, is disposed in the floc growing section. Flocs of flocculant injected water can be rapidly formed, and growth of the flocs can be accelerated.

Abstract: A reservoir management system for a water reservoir having inlet and outlet piping and means for adding chemicals in controlled amounts to the water within the reservoir. One or more eductors are positioned within the water reservoir to mix and circulate water within the reservoir. A recirculating pump is located externally to the reservoir and has an inlet line that taps into the outlet piping from the reservoir. One or more sample lines remove test streams of water from the reservoir which are analyzed to determine the level of at least one of chemical in the test stream to provide a chemical-related signal. A controller receives the signal and compares the signal to a set point indicative of the level of chemical desired within the reservoir to maintain, increase, or decrease the amount of chemical added to the water within the reservoir in controlled amounts.

Abstract: A method and device for treating sludge and slime to enable reuse in soil upgrading and in building material systems. Hydrophilic sludge and slime having a water content not less than 70% are continuously treated in a manner which enables colloid removal, dehydration, oxidation, sanitation, stabilization, mineralization, filtration and porosification. The device for treatment includes a hollow caisson traversed in the longitudinal direction by the treated product and provided with at least an intake for the product to be treated and at least an outlet for the treated product.

Abstract: A flocculation apparatus and method for treating colloidal suspensions. The apparatus includes a suspension inlet, a suspension outlet and an inner cone mounted centrally in a conical outer housing. The inner cone and/or the outer housing is rotatable relative to one another and a gap for through-flow of suspensions is present between the inner cone and the outer housing. In the method, continuously measuring a flock size distribution of a suspension stream passed into the flocculation apparatus is provided. Additionally provided is axially displacing the inner cone and/or outer housing as a function of the flock size distribution and the suspension volume flow rate.

Abstract: The invention relates to a method of clarifying and/or thickening a solution containing solids i.e. a slurry, and the apparatus for accomplishing this. Using the method and apparatus of the present invention, the flocculant to be fed into the clarification and thickening equipment is mixed evenly and with a small shear force into the slurry in the feedwell of the apparatus. The feedwell is equipped with a mixing device. The slurry is taken onwards from the feedwell evenly into the clarification tank inside the underflow layer, which enables the separation of a clear overflow solution.

Abstract: Contaminated water is chemically treated and aerated while being gravity fed through a trough. A series of slats are positioned in the trough to interrupt the flow and induce mixing and aeration. An array of aeration edges is removably installed over the slats. A holder for containing chemical treatment matter therein is positioned adjacent each slat. The aeration edges consist of upper and lower plates stacked one on top of the other. Each plate is provided with horizontal fingers extending in a direction downstream relative to the flow direction of the treated water. Each finger terminates in a baffle, which baffle is positioned substantially perpendicular to its finger.

Abstract: A water aerating device for an aquarium includes a housing having a chamber to receive a guide device which is arranged between an inlet and an outlet of the housing, a paddle wheel is rotatably attached onto the guide device, and a pumping device may be used to pump the water and to force the water to actuate the paddle wheel and to generate eddy current. Fresh air or carbon dioxide may be selectively pumped into the housing. A barrel may be used to adjustably attach the housing to the aquarium. A casing may be disposed on the barrel, to receive and collect dirt or protein carried by air bubbles that may be generated by the eddy current.

Abstract: A septic tank includes a chamber, an inlet through which waste water enters the chamber, an outlet located below the inlet, and an outlet pipe including an outlet section extending through the outlet. The outlet pipe further includes an inclined section in the chamber and extending downward from the outlet pipe. The inclined section includes a closed lower end. The inclined section further includes a suction portion located below the outlet. The suction portion includes a plurality of through-holes in a circumference thereof for sucking dischargeable purified waste water in the chamber into the inclined section and then discharged via the outlet section.

Abstract: A radial disc impeller for use with a liquid or liquid suspension mixing assembly, having an axis of rotation. The radial disc has a hub and at least one disc extending radially away from the axis of rotation. The disc is connected to the hub at first axial location. The disc impeller includes a first blade connected to the disc. The first blade has an extension that extends radially away from the axis of rotation. The disc impeller also includes a second blade connected to the disc. The second blade has an extension that extends radially away from the axis of rotation.

Abstract: It has been discovered that a mechanical flotation system having only two cells can be nearly as efficient as one having more cells, yet provide an apparatus with a considerably smaller footprint, significantly reduced capital and operating costs, as well as be resistant to floating oil recovery platform wave effects. The dual-cell mechanical flotation system has, in sequential order, an inlet chamber and two gasification chambers or cells, each with at least one gas ingestion and mixing mechanism, and a discharge chamber. A common primary skim collection channel atop the partition dividing the gasification chambers efficiently channels away the bulk of the floating collected matter. At least one baffle depending from the top of the vessel near the primary skim collection channel helps dampen the action of the fluid containing the suspended matter when the vessel is affected by wave motion against the floating oil production platform.

Abstract: A plasma concentrator for producing plasma concentrate from a plasma from which erythrocytes have been substantially removed. The device comprises a concentrating chamber having an inlet port and an concentrate outlet, the concentrating chamber containing hydrogel beads and at least one inert agitator; and a concentrate chamber having an inlet communicating with the concentrator outlet through a filter, and having an plasma concentrate outlet port. A process for producing plasma concentrate from plasma from which erythrocytes have been substantially removed, comprising the steps of a) moving the plasma into a concentrating chamber containing hydrogel beads and an agitator to form a hydrogel bead-plasma mixture; b) causing the agitator to stir the hydrogel bead-plasma mixture, facilitating absorption of water by the beads from the plasma, until a hydrogel bead-plasma concentrate is formed; and c) separating the plasma concentrate from the hydrogel beads by passing the plasma concentrate through a filter.

Abstract: In the present invention, solid contents 38, which are collected by a solid-liquid separation device 33 in a solid-liquid separation tank 14 and charged into a decomposing treatment tank 11, are decomposed to water and CO2 by the action of aerobic microbes and the air (oxygen) supplied from a lower aeration tank 12 and substantially disappear. The oil contents contained in the water having been decomposed is removed by an oil-water separation tank 13.

Abstract: An apparatus for treating metal-working fluid comprises: a heating vessel for receiving and holding metal-working fluid for treatment; a heater for heating the metal-working fluid in the heating vessel; an agitator for agitating the metal-working fluid within the heating vessel; an aerator for aerating the metal-working fluid within the heating vessel; and a holding vessel for receiving from the heating vessel and holding treated metal-working fluid. During heating, heated ambient air may be drawn through air inlets and through the fluid agitate and aerate the fluid, thereby ensuring uniform heating and extracting gaseous contaminants. Mist and/or gaseous contaminants may be removed from the airflow prior to its release into the environment. Concentration in the metal-working fluid of at least one metal may be reduced using an using-exchange filter.

Abstract: The special features of the water treatment apparatus in the present invention are that a tank fitted with a raw water inlet and a treated water outlet on the upper part, has within said tank an upper chamber and lower chamber which divide said tank into two sections, upper and lower, and is fitted with a separating wall which can be raised and lowered to adjust the water level in said upper and lower chamber, the upper chamber above said separating wall and the lower chamber below said separating wall both being filled with water. By use of this apparatus, a novel water treatment apparatus is provided which can be extremely easily assembled into a water treatment facility.

Abstract: A surface aeration impeller for use in a biochemical oxidation tank. The impeller is rotatable about an axis perpendicular to the static liquid surface. The impeller has a plurality of blades mounted on the underside of a disc or disc-like surface. Each blade has a multi-faceted or curved geometry ranging from vertical at the point of attachment to the disc to partially inclined at the bottom. The blades are spaced circumferentially about the axis and are disposed at acute angles to radial lines from the axis of rotation of the impeller. The lower portions of the blades, which are inclined but non-vertical, are positioned at or below the static liquid surface. When the impeller is rotated, the lower portion pumps the liquid up onto the vertical portion of the blades where the liquid is discharged into a spray umbrella in a direction upwardly and outwardly away from the impeller.

Abstract: The present invention concerns equipment for the leaching of solid matter from a sludge with the aid of a gas containing oxygen, the said equipment comprising a tall reactor (1) equipped with a central pipe (2) and from the reactor bottom (3), an upward-directed double-action mixer (5). The mixer is situated in the vicinity of the lower edge of the central pipe: the upper blades (13) of the mixer produce a downward suction flow from the central pipe, and the lower blades (14) disperse the gas to be fed into the sludge in the form of small bubbles, thereby preventing the solid matter from settling to the bottom of the reactor.

Abstract: Oxygen depleted wastewater is introduced as a stream into the top of a vessel containing a set of perforated triangular vanes arranged to rotate about a vertical axis. The stream is directed downwardly in the vessel along a path that traverses the path of the rotating vanes so the vanes impact the stream. The force of the impact of the vanes against the stream and the perforations in the vanes cooperate to create a fine droplet mist in the vessel. Atmospheric air drawn into the vessel is mixed and entrained in the mist so that when the mist coalesces, micro-fine size air bubbles are formed. The triangular vanes further provide a pumping action to expel a now aerated stream of wastewater from adjacent the bottom of the vessel.

Abstract: A system and method for performing hydrothermal treatment includes a scraper formed as a hollow cylinder. The scraper is positioned in the reactor vessel with the scraper axis substantially co-linear with the longitudinal axis of the cylindrical reactor vessel. A mechanism is provided to rotate the scraper about the longitudinal axis of the reactor vessel. One or more elongated scraper bars are positioned inside the reactor vessel between the scraper and the longitudinal axis of the reactor vessel. Each scraper bar may be held stationary with respect to the reactor vessel, or each scraper bar may rotated relative to an axis passing through the scraper bar to remove any solids that have accumulated on the scraper or on the scraper bar. To prevent accumulation of precipitating solids on the scraper bar itself, each scraper bar may have internal cooling channels or the capability of releasing a purging fluid.

Abstract: Oxygen depleted wastewater is introduced as a stream into the top of a vessel containing a set of perforated triangular vanes arranged to rotate about a vertical axis. The stream is directed downwardly in the vessel along a path that traverses the path of the rotating vanes so the vanes impact the stream. The force of the impact of the vanes against the stream and the perforations in the vanes cooperate to create a fine droplet mist in the vessel. Atmospheric air drawn into the vessel is mixed and entrained in the mist so that when the mist coalesces, micro-fine size air bubbles are formed. The triangular vanes further provide a pumping action to expel a now aerated stream of wastewater from adjacent the bottom of the vessel.

Abstract: A floating pump assembly including a compact floatation assembly structured to float on a body of water and supporting a flow pump housing having an inlet, outlet and fluid drive assembly being submerged and wherein at least the outlet is oriented in a predetermined, preferably horizontal orientation during operation and activation. A power assembly is supported on the floatation assembly and is drivingly connected to the fluid drive assembly for powered operation thereof. The predetermined orientation of at least the outlet and particularly the direction of discharge of water issuing from the outlet substantially is such as to eliminate or at least minimize the tendency of the floatation device to become disoriented or unstable at least in terms of being increasingly submerged into a deeper position within the body of water upon activation and operation of the floating pump assembly.

Abstract: A biological filter for an aquarium hang-on filter that attaches to the outflow of the aquarium hang-on filter. The biological filter includes a multiplicity of convoluted plastic channels over which water exiting the aquarium hang-on filter cascades and on the surfaces of which aerobic bacteria can form.

Abstract: A garbage treatment apparatus of the type which includes a cylindrical container formed to store an amount of porous inorganic balls containing microorganism effective for decomposition of garbage and to store an amount of garbage to be treated, a rotation shaft vertically mounted for rotary movement in a central portion of the container, a driving mechanism mounted on the container for driving the rotation shaft, a screw propeller assembly mounted to a lower portion of the rotation shaft for rotation therewith to feed downward the inorganic balls and garbage stored in the container, a flow adjustment plate in the form of a truncated conical plate mounted within a bottom portion of the container concentrically with the rotation shaft and placed in an upwardly expanded condition, and a rotary disk horizontally mounted to a lower end of the rotation shaft for rotation therewith and placed under the propeller assembly, the rotary disk being coupled with the flow adjustment plate to close a lower end opening of t

Abstract: Disclosed is a wastewater treatment plant. The wastewater treatment plant comprises an aeration tank for storing wastewater; a reaction tank disposed inside the aeration tank, the wastewater being purified while circulating inside the reaction tank and being supplied with oxygen; an air intake tube for introducing air into the reaction tank; a dispersion member for dispersing the air introduced through the air intake tube to the wastewater to generate bubbles; and a blade assembly disposed inside the reaction tank for having the bubbles dispersed by the dispersion member come into collision with each other, prolonging a staying time of the bubbles to increase the dissolved oxygen, and directing the bubbles in a predetermined direction to lead the wastewater to agitate.

Abstract: A system and method for performing hydrothermal treatment includes a scraper formed as a hollow cylinder. The scraper is positioned in the reactor vessel with the scraper axis substantially co-linear with the longitudinal axis of the cylindrical reactor vessel. A mechanism is provided to rotate the scraper about the longitudinal axis of the reactor vessel. One or more elongated scraper bars are positioned inside the reactor vessel between the scraper and the longitudinal axis of the reactor vessel. Each scraper bar may be held stationary with respect to the reactor vessel, or each scraper bar may rotated relative to an axis passing through the scraper bar to remove any solids that have accumulated on the scraper or on the scraper bar. To prevent accumulation of precipitating solids on the scraper bar itself, each scraper bar may have internal cooling channels or the capability of releasing a purging fluid.

Abstract: The invention is a paddlewheel aerator comprising a support structure, a drive mechanism contained within the support structure, a rotatable shaft extending horizontally from the drive mechanism; and a plurality of paddlewheels surrounding the shaft. A plurality of support legs are formed integrally with the support structure. In a preferred embodiment, a watertight drive box is positioned within the support structure. The drive box has a removable cover and a substantially water tight seal for preventing ingress of water. The drive box contains a motor drivably connected to the shaft. The motor is contained within an upper portion of the drive box so that the motor is positioned at a vertically elevated level compared to the shaft.

Abstract: For conversion of harmful compound in contaminated liquid into harmless compound by use of reactant, a plurality of agitators are arranged in a vertical superposition within a closed agitation chamber and, after the contaminated liquid is charged into the agitation chamber, the agitators are driven for rotation at a high speed in a rage from 10,000 to 18,000 rpm in order to create a field of super critical conditions in which free radicals are liberated from the harmful compound and coupled by the reactant. Neither high temperature heating nor high level pressurization is needed for processing of the contaminated liquid.

Abstract: An aquaculture wastewater treatment system is provided including three wastewater treatment subsystems. The first subsystem is comprised of a fish raceway solids removal channel populated with relatively high densities of a detritivorous fish such as tilapia and/or carp, that have high potential as an efficient means of feeding on, and thereby, removing suspended solids and particulate matter that are present in the primary fish production effluent. The second wastewater treatment subsystem is comprised of an enhanced form of nitrifying reactor termed the Suspended Media Ammonia Removal Technology (SMART) biofilter reactor subsystem. This water treatment component consists of an open ditch bioreactor oxidation vessel in which water is circulated by means of one or more powered paddlewheels.

Abstract: A regional water purifier collects blue green algae continuously by using a water flow produced by the operation of a water flow generator, and continuously and efficiently processes the algae to make it inactive by irradiating ultrasonic waves thereon. Thus, regional water purification is performed efficiently at a far lower cost than the conventional method through the blue green algae processing. The purifier includes a blue green algae processing duct 2, which is disposed under water where blue green algae breed in large quantities, and has an ultrasonic wave transmitter 3 therein for transmitting ultrasonic waves to process the blue green algae with the ultrasonic waves. Both ends of the duct 2 are open, and a water flow generator 4 produces a suction flow for sucking water containing blue green algae into the blue green algae. processing duct 2 from a first end 2a and a discharge flow for discharging the water from the second end 2b.

Abstract: Flocculation apparatus and flotation apparatus useful in flocculation apparatus for floating paddles upwardly and allowing gravity to move paddles downwardly through a liquid to agglomerate particles suspended in the liquid.

Abstract: The invention relates to a method and installation for treating waste water from oil seed and cereal processing, especially olive oil mill waste water (OMW), guaranteeing a substantial reduction of environmentally damaging waste water ingredients while taking economic factors into account. The aim of the invention is to develop a method and system designed to treat olive oil mill waste water, whereby higher physical, chemical, biochemical and biological elimination rates can be achieved using the material and energy potential of the OMW while taking economic aspects into account. The installation needs to be able to operate at short notice due to the amounts of seasonal waste. In the inventive method and installation thus disclosed, the fresh waste water is pre-treated by subjecting it to acidification with biogenic flocculation and separation of solid particles.

Abstract: The present invention provides a concentration type aggregation reaction apparatus having a concentration screen, which enables an aggregation reaction to be conducted in sludge and the sludge to be concentrated by separation of a liquid by means of a single apparatus. The concentration screen is in a cylindrical form and includes slits having horizontal openings. A decelerating device is connected to an upper portion of a shaft for an agitator for agitation in the tank and brushes are connected to the decelerating device. The brushes are adapted to revolve along opposite surfaces (on a primary side and a secondary side) of the screen. By use of these brushes, aggregates adhered to the screen are continuously removed.

Abstract: Because mechanical aerators are located in a pond of liquid and, therefore, not subject to convenient visual monitoring by operations personnel, it is desirable to have a method for automatically detecting and dislodging debris which become caught on the aerator propeller. The present invention includes a waterproof vibration sensor mounted within sensing range of the rotating shaft of the aerator propeller. The sensor is operably connected to the propeller motor so that when the sensor detects excessive rotating shaft vibrations caused by debris attached to the propeller, the motor is automatically shut down and then run in the reverse direction causing the debris to be thrown off the propeller. Once the debris have been dislocated from the propeller, the motor is restarted in the forward direction. If the sensor continues to detect excessive motor shaft vibration, the motor will once again be shut down and then run in the reverse direction.

Abstract: A process for biological purification of waste water by the activated sludge method wherein the waste water is continuously passed through one or more treatment zones and a clarification zone, wherein the waste water treated in the last treatment zone at the outlet from the zone under suitable control of aeration and stirring is continuously divided into a predominantly aqueous fraction and a sludge-containing fraction, and wherein a portion of the sludge fraction is recirculated and mixed with non-treated waste water, of which the former is subjected to clarification, and the latter is recirculated to the same or a preceding treatment zone.

Abstract: A membrane filter apparatus includes a treatment tank; a membrane unit disposed within the treatment tank and composed of an array of membrane elements; a tubular (rectangular-tube-like) skirt element disposed at a bottom portion of the membrane unit, an aerator disposed under the skirt element for the purpose of discharging gas; a partition disposed at a bottom portion of the membrane unit and defining, together with the skirt element, a compartment within the skirt element; and a gas supply unit for supplying gas to the compartment. The gas discharged from the aerator becomes bubbles. The bubbles are supplied into and rise within the compartment, thereby increasing their rising force upon entry into gaps between membranes. Since the gas is supplied into the compartment by the gas supply unit, the flow rate of bubbles along the opposite side edge portions of the membrane unit can be increased.

Abstract: A biochemical oxidation system and process is disclosed for the removal of insoluble sulfides from metal ores. A liquid mixture of an ore slurry and of a liquid biochemical oxidation medium is flowed through a plurality of covered overflow tanks connected in series. The liquid mixture is continuously aerated in an aeration chamber formed in the tanks with a mixture of a purified oxygen gas and a purified carbon dioxide gas as introduced into the aeration chamber. A substantially sulfide-free liquid mixture is discharged from a last tank into a clarifier in which at least a portion of the biochemical oxidation medium is separated from the liquid mixture for recirculation into the tanks.

Abstract: A continuous process for treating a liquid-containing organic waste material. Sufficient acid is added to the material to achieve a pH of 2 or less in the material. The material is subjected to a beating treatment sufficient to (a) reduce the viscosity of the material, and (b) by heat-generated by friction during the beating treatment and by heat generated by reaction of the acid with the material, raise the temperature of the material so that liquid in the material is vaporized to gases. Sufficient alkaline medium is added to the material such that the pH of the material is raised to at least 5.

Abstract: The invention describes an apparatus which can be used both for aeration of water and mixing of water. The apparatus comprises a power source which can drive a helical propelling device, whereby the propelling device can operate in both directions of rotation. The propelling device is located completely below the surface of the water. Further, the apparatus is fitted with an additional circulation element which is positioned above the propelling device and at least partly below the surface of the water. The apparatus can also be fitted with further conventional elements such as a pump housing, a deflector and so on.

Abstract: A settling tank for separating an emulsion with a known volumetric percentage of oil includes lower and upper settling chambers. The emulsion is settled by gravitational means and can be aided by demulsifying agents. Once settled, a layer of oil floats on top of the water. The volumes of the lower and upper settling chambers are configured so that all of the oil settles within the upper settling chamber. The oil can then be drained from the upper settling chamber leaving only clean water in the tank structure.

Abstract: A waste water purification process, in particular a continuous waste water purification process is disclosed, as well as a waste water purification plant system, in particular for continuous waste water purification. Waste water is purified in that an aerated mixture of waste water with activated sludge is degassed before being discharged into the secondary settling basin. The waste water purification system has a venting device that connects the aerating container or a separate chamber thereof to the secondary settling basin or a separated chamber thereof. The venting device is designed as a U-shaped tube. One of its branches forms the supply collecting pipe and the second branch forms the discharge collecting pipe, whereas the section that interconnects its two top ends delimits the intermediate chamber that contains a separate gas suction chamber.

Abstract: A mass transfer device for use in the treatment of an impure liquid includes a housing into which the impure liquid and a reagent are to be introduced, the housing having a side wall. The device also includes an impeller assembly, including a plurality of impeller blades, rotatably mounted in the housing, at least one impeller blade having a tip which terminates in close proximity to an interior surface of the side wall of the housing and the or each impeller blade being shaped ad dimensioned to impart shear forces, at its tip, to liquid and reagent located between the side wall and the tip and to generate a low pressure region at a trailing end of the said tip upon rotation of the blade relative to the side wall, thereby enhancing a reaction between the reagent and impurities in the liquid. The invention also relates to a method of and equipment for treating an impure liquid.

Abstract: An apparatus and method for installing a fluid dispenser (10) in a submerged relation in wastewater of a wastewater chamber (14). The fluid dispenser (10) is secured to a bracket (44) which slides along a vertical post (32) in the wastewater to a desired depth at which a stop (46) positions and blocks further sliding movement of the bracket (44) and fluid dispenser (10). Fluid dispenser (10) and sliding bracket (44) move downwardly from the upper end of post (32) and when sliding bracket (44) hits the stop (46), bracket (44) and dispenser (10) pivot relative to the post (32) to a desired position and direction of the dispenser (10). Serrated knife edges (100) on propeller (92) cooperate with serrated knife edges (112) on collar (90) on opposed sides of an orifice (106) to cut and remove any solid particles obstructing the orifice (106).

Abstract: Ferrofluid coated particles resulting from a ferrofluid materials separation process are washed with a solvent which is the same material as the liquid carrier employed in the ferrofluid. The result is a "dirty" solvent which is a very weak ferrofluid. The dirty solvent is then filtered or centrifuged to remove dust particles and other impurities and then the solvent is recovered by distillation in a distillation unit. The solvent can then be reused in the materials reclamation process. The residue in the distillation unit is surfactant-coated particles of ferrofluid. This residue is mixed with either clean or unprocessed solvent in the right proportion and the slurry is passed through an attritor to convert it to a high grade ferrofluid. The ferrofluid can also be reused in the materials separation process.

Abstract: A mixing device in the form of a centrifugal pump is used to mix gas (typically air) with liquid (typically effluent water, dispersion water, or waste paper pulp suspension, etc.). The pump is provided with a common inlet conduit for both the liquid and the gas so that liquid and gas flow freely and in an arbitrary ratio into the pump, that is there is no controlling or adjusting of the flows. The gas is allowed to either dissolve in the liquid or be mixed as small bubbles with the liquid, and any surplus gas is separated from the mixing device (e.g. by holes in the pump impeller leading to a rear portion of the pump which is attached to a vacuum source, such as a liquid ring pump). The liquid and gas dissolved therein, and small bubbles mixed therein, are discharged from the mixing device at a pressure that is raised from the inlet pressure, due to the action of the impeller, which pressure development enhances the dissolution of gas in the liquid.

Abstract: Liquid containing organic waste material and chemicals are continually introduced into the upper part of a vertical, cylindical treatment chamber. While sinking through the chamber, the material is beaten by fast rotating treating elements which also mix the material. The treating elements also move in axial direction to free vapors and gases from the material. Vapors and gases are removed from the top of the chamber.

Abstract: A fluid mixing system including a liquid mixing device and method for generating and maintaining a substantially uniform, horizontal velocity profile in a liquid circulation system, such as a plug flow reactor, which requires less horsepower than conventional liquid mixing systems without losing mixing effectiveness. The liquid mixing device employs a top-entry, vertically-oriented impeller and a housing that directs the pumped flow in a generally horizontal direction. The liquid mixing module may be positioned in close proximity to an aeration source within a channel.

Abstract: Excessive vibration in industrial mixers such as flotation cells and draft tube mixers is attenuated by connecting a vibration dampening device to a rotor or impeller which is disposed in a mixing tank for pumping a nonhomogeneous fluidic material placed in the tank. In a draft tube mixer, where the rotor is connected to a drive shaft in turn connected to a motor for rotating the rotor, the vibration dampening device is connected to the shaft on a side of the rotor opposite the motor. In a froth flotation cell, if the rotor is hollow, the vibration dampening device is disposed inside a pipe in turn mounted inside the rotor along an axis thereof. The vibration dampening device takes the form of a tuned mass dampener tuned to a resonance frequency of the particular mixing apparatus.