Abstract: The invention relates to an apparatus and a method for thickening liquids carrying suspended particles, such as a slurry containing minerals. The thickening apparatus comprises a tank (2), a feedwell (4), which includes a chamber having an inlet for receiving feed slurry (9) and an outlet in fluid communication with the tank and means for distributing the material in the tank, at least one conduit (5) for feed slurry to deliver a feed slurry (9) into the feedwell, means for diluting the feed slurry, when at least one separate dilute liquid conduit (16, 19) is directed tangentially with respect to the feedwell (4) and at least one inflow aperture (15) is arranged tangentially with respect to the feedwell for recirculating the dilute liquid from the tank inside the feedwell in order to dilute the feed slurry.

Abstract: A fluid clarification system and method is described in which fluid is passed through one or more settling compartments, each having a solids outlet at the base of the compartment. The base of each compartment includes inclined surfaces for guiding settled solids to the outlet. Also described is a polymer reaction trough including baffles to promote gentle mixing of inflow fluid with flocculant. The system is designed to reduce costs of transportation, flocculent, and solids handling. The system is preferably arranged to facilitate transport on a skid or trailer, while maximizing fluid handling capabilities and minimizing costs.

Abstract: Disclosed herein are systems for removing particulate matter from a fluid, comprising a particle functionalized by attachment of at least one activating group or amine functional group, wherein the modified particle complexes with the particulate matter within the fluid to form a removable complex therein. The particulate matter has preferably been contacted, complexed or reacted with a tethering agent. The system is particularly advantageous to removing particulate matter from a fluid waste stream following mining or ore processing operations.

Abstract: A water or wastewater treatment system to reduce phosphorus or other pollutant concentrations in water or wastewater may include an optional primary treatment stage in fluid communication with a biological secondary treatment stage. The secondary treatment stage may, in turn, be fluidly connected with a tertiary treatment stage, which may include a chemical treatment portion for reducing phosphorus or other pollutants to desired levels. The precipitated phosphorus and other solids or sludge produced from the chemical treatment portion may be recycled upstream for reuse in the primary, secondary, and/or tertiary treatment stages. Such recycle may reduce the amount of added chemicals required in the tertiary treatment stage to phosphorus or other pollutants to desired amounts.

Abstract: A method of delivering feed, for example a paraffinic solvent treated bitumen froth, to a separation vessel, for example a froth separation unit (FSU). The feed is delivered from one or more side inlets that may be substantially normal to, and flush with, the wall of the vessel. In contrast to certain conventional feed systems used in gravity separators which use a distributor plate to widely distribute the feed with a vessel, the feed is delivered such that it flows down the inside wall of the vessel. This feed delivery is characterized by a Richardson number of greater than 1.0. Such feed delivery is particularly useful where the feed has particles with a bi-modal size distribution to be separated from an overflow stream. The gentle flow serves to mitigate the upward flux of the smaller particles, for example mineral solids, by being trapped below the larger particles, for example precipitated asphaltene aggregates.

Abstract: An apparatus for reducing pollution in wastewater that collects in a catch basin is disclosed. The apparatus includes a hood affixed to an interior wall of a catch basin over an outlet, and a skirted boom adjacent to at least a portion of said hood and fixed relative to the hood. The skirted boom includes an upper portion and a skirt extending down from the upper portion. The skirted boom is installed so that the upper portion of the skirted boom is adjacent to said hood at the static water level in the catch basin and the skirt extends downward, preferably below the bottom of the hood. A tether assembly for installing the apparatus and a method of using the same is further disclosed.

Abstract: A vessel for separating sand and other solid particulate matter from heavy oil and other hydrocarbons includes a horizontally disposed vessel having a plurality of internal weirs. There are gaps below the weirs along the bottom of the vessel where the vessel defines a plurality of longitudinal channels having a plurality jets. The wash jets provide fluid force to move the sand along the channels and provide agitation. The oily solids may be introduced into the vessel at a first end and collected from a solids outlet at a second end. Oil and wash fluid may be skimmed from upper portion of the vessel with an oil skimmer at the first end.

Abstract: A wastewater treatment system is disclosed which uses algae to generate oxygen for primary digestion of municipal wastewater. A coagulant composition containing a cationic starch and an aluminum salt is used to remove algae and other solids from the wastewater stream. The unique combination of the starch coagulant and algae species produced water of exceptionally low turbidity.

Abstract: A flotation apparatus (10) for the separation of solid particles from a suspension with formation of a fraction lacking in solid particles and a fraction rich in solid particles comprises a tank with an inlet (14) for the suspension, with an outlet (16) for the fraction lacking in solid particles, with an outlet (18) for the fraction rich in solid particles, and with at least one block of slats (20) composed of multiple overlapping slats (22), wherein the at least one block of slats (20) has a rear side oriented toward the tank wall and a front side arranged on the opposite side of the block of slats (20). On the rear side of the at least one block of slats, a plate (26) is arranged which extends over at least a part of the rear side of the block of slats, wherein the plate has a plurality of openings which facilitate the penetration of liquid through the plate.

Abstract: A separation chip for separating an insoluble component from a suspension using centrifugal force by rotation, includes a suspension holding tank, a separation liquid holding tank, and an insoluble component holding tank arranged in order from an inner circumferential side during rotation, wherein the suspension holding tank and the insoluble component holding tank are connected to each other, the insoluble component holding tank and the separation liquid holding tank are connected to each other by a narrow portion, and in the insoluble component holding tank, a connecting portion with the suspension holding tank is positioned further toward an outer circumferential side than the narrow portion.

Abstract: A system for introducing a liquid disinfectant into treated wastewater comprising a source of liquid disinfectant, a sensor to detect flow or level of treated wastewater from a wastewater treatment system, a selectively operable valve to allow the liquid disinfectant to flow via gravity into the treated wastewater and a controller operatively connected to the sensor to open the valve in response to sensed, increased flow or level of the treated wastewater in a receiver for the wastewater above a sensed, predetermined point.

Abstract: A wastewater treatment system and process biologically treats wastewater to produce substantially clean water effluent and byproducts. The treatment system includes an array of media wheels that rotate into and out of exposure to sunlight for sustained algae growth. One byproduct is algae removed from the rotating media wheels, which may be provided to other processing facilities to produce, for instance, bio-diesel fuel. Waste CO2 from the processing facility may also be returned to the treatment system for enhanced algae growth. Bacteria is provided to form a symbiotic relationship with the algae, fueled by sunlight to effectively remove toxic materials from the wastewater. Large scale facilities may integrate the treatment systems in a regenerative cycle in which the biomass obtained from the algal colonies is used in a separate facility and byproducts of the operation of the separate facility are used by the treatment system to fuel further algal growth.

Abstract: A spraying means is arranged on the scum-flowing wall surface side of wall surfaces forming a scum inlet of a scum discharging mechanism. The spraying means sprays pressured water upward along the wall surface on the scum-flowing side from when a part of the scum inlet is submerged in water until the scum begins to flow into the scum inlet. As a result, even large lumps of scum exceeding 10 cm in thickness (diameter) may be lead smoothly into a pipe by the pressured water, and the amount of discharged water accompanying scum discharge may be reduced to 1/20 to 1/30 than by a conventional scum removing apparatus.

Abstract: A ballasted sequencing batch reactor system for treating wastewater including one or more sequencing batch reactors. A weighting agent impregnation subsystem is configured to mix biological flocs and weighting agent to form weighted biological flocs. A weighting agent recovery subsystem is configured to recover weighting agent from the weighted biological flocs and reintroduce the recovered weighting agent to the weighting agent impregnation subsystem.

Abstract: A wastewater treatment apparatus for a wastewater treatment system that includes a septic tank with a lower sludge layer, an upper effluent layer, and a tank floor. The wastewater treatment apparatus includes a positive pressure pump that is configured to pump a fluid, and a tube that has an outlet that is spaced from the tank floor. The tube is in fluid communication with the positive pressure pump.

Abstract: A flange joint for connecting two objects in a fluid connection so that fluid can flow between the objects. The flange joint has a gasket and the gasket is installed in the flange joint. The flange joint has at least one channel for feeding additional fluid from outside of the flange joint through the gasket into fluid flowing between the two objects.

Abstract: An apparatus for the flocculation of solid particles in a solid-liquid stream including an enclosure, an upwardly converging flow diverter defining a first zone and a second zone within the enclosure, and a solid-liquid stream inlet into the first zone of the enclosure at or towards the bottom of the first zone in proximity to the lower region of the flow diverter, the upwardly converging flow diverter having an upper opening for fluid communication between the first zone and the second zone. The apparatus is preferably a feedwell for a separation device for separating solid particles from a liquid in a solid-liquid stream.

Abstract: A system for separating suspended and dissolved materials in a fluid having a pH offset from neutral is disclosed. It employs a plurality of stacked, generally flat treatment beds each having a surface angled downward for receiving the fluid. Since the fluid is spread over a large surface, its velocity slows causing suspended materials to drop out of the fluid as a sludge. A pH correction device may add an agent to the flowing fluid which will bring the pH closer to neutral thereby causing said dissolved materials to precipitate out and into the sludge. Atmospheric oxygen may also be used to effect the precipitation. Portions of the beds may be isolated and the sludge collected resulting in a fluid having substantially less suspended and dissolved materials at a pH and temperature closer to normal. Energy may be produced from the movement of liquid through the system or from the heat energy of the fluid. Magnetics may be utilized to improve the precipitation of solids.

Abstract: A method and apparatus of anaerobic treatment which makes it possible to prevent disintegration of granular sludge and perform high-load high-velocity anaerobic treatment stably even in the case where treatment is performed under conditions where the granular sludge is easily disintegrated. In a reaction tank 20 which retains the granular sludge, nitric acid or nitrous acid is adjusted so that they have a certain concentration range. For example, nitric acid is added to the liquid to be treated by connecting the nitric acid addition path 12 to a midway point of the path of the liquid to be treated 31 which introduces the liquid to be treated to the reaction tank 20, and nitric acid is mixed with the liquid to be treated. By introducing nitric acids within the reaction tank 20, denitrifying bacteria etc. can multiply, and disintegration of the granules is prevented.

Abstract: A system for washing contaminated sand comprises a plurality of reactors arranged in a sequence from a first to a last reactor. The first reactor is configured to receive contaminated sand. Each reactor comprises a funnel portion in a lower section thereof for accumulating a sand layer and a sand conveying device for removing sand through an aperture defined near a bottom of the funnel portion. Each reactor except the first reactor receives sand removed from a previous reactor. The system also comprises a steam supply system for providing each reactor with steam for washing the sand, a water supply system for providing the last reactor with clean water for rinsing the sand, and a fluid outlet associated with each reactor for removing fluid and providing the fluid to a separator for separating the fluid into first and second portions respectively containing relatively low and high proportions of hydrocarbons.

Abstract: A device for purification of contaminated liquid includes (a) a prepurification tank in which raw water to be purified and foaming reagent are introduced and mixed and the pH value is adjusted, whereby prepurified water is obtained; (b) at least one tower-shaped main purification block, wherein each of the at least one tower-shaped main purification blocks, includes, arranged vertically one under another; (i) a drum station for combined gas and water scrubbing by foaming; (ii) a defoaming station; (iii) an ionization station; and (iv) a collecting tank for collecting resultant purified water; (c) a separating device in which sludge from the purification tanks is introduced; and (d) at least one afterpurification filtering device connected to the collecting tank of the main purification block by a supply line and wherein a pure water outlet line extends from the at least one afterpurification filtering device.

Abstract: A method of wastewater treatment is described. The method includes: (i) receiving wastewater; (ii) performing a first type of treatment on wastewater to produce wastewater having a first property which is capable of changing; (iii) preventing the first property from changing; (iv) performing a second type of treatment on wastewater; and wherein the first property includes at least one property selected from a group consisting of biochemical oxygen demand (“BOD”) level, dissolved oxygen level, solid content and nutrient level.

Abstract: A filter system for filtering water and/or wastewater including a sludge blanket clarifier for removing at least some impurities from influent. The sludge blanket clarifier includes a clarifier compartment in which a sludge blanket is to be formed to remove at least some impurities from influent directed into the clarifier compartment and through the sludge blanket. The clarifier compartment has at least one vertical sidewall extending from a bottom of the clarifier compartment to a top of the clarifier compartment. The clarifier compartment has a cross-sectional area that varies over at least a portion of a height of the clarifier compartment such that the velocity of influent just prior to entry into the sludge blanket is less than the velocity of influent just after entering the clarifier compartment. The sludge blanket clarifier preferably has one or more flocculator modules disposed in the clarifier compartment to aid in flocculation and distribution of influent.

Abstract: A product and apparatus for cleaning water or industrial and sewage waste water includes a mixture of diatomite that is heated and stirred to impart an enhanced negative electrical charge to the diatomite. A mixture of approximately 50% aluminium chloride (AlCl3) by volume is blended to provide a powder mixture for use as a flocculant in the system. According to a modification, the charged diatomite is instead blended with a mixture of approximately 50% ferric chloride (FeCl3) by volume and is stored in liquid form for later use as a flocculent in the system. From one to five percent, by volume, of polyacrylamide is preferably added to the mixture for use in sewage waste water treatment applications. An efficient system for reacting either the mixture or separately adding the diatomite and the metallic chloride to the water is described.

Abstract: In an activated sludge treatment of organic waste water, excess sludge from the activated sludge aeration vessel is processed with hypochlorous acid in place of ozone without set up of aeration vessels and blowers to improve volume reduction cost of sludge without deterioration of water quality. The hypochlorous acid process is carried out by using an acidulous sodium hypochlorite aqueous solution which is prepared by mixing sodium hypochlorite aqueous solution with a dilute hydrochloric acid and diluting the resulting mixture with water within 1,000 ppm to 50,000 ppm of available chlorine concentration at a pH zone of more than 4 to less than 7.

Abstract: A system for purifying non-potable water to make said water potable includes an intake pump for bringing the non-potable water into the system. At least one centrifugal separator separates the non-potable water into suspended solids, saline water and oil. At least one ozone contact chamber injects ozone into a water stream being injected into at least one of the at least one of the centrifugal separators. A series of progressive filtration components are used for progressively filtering the saline water from the at least one centrifugal separator. The salinization filters then desalinate the progressively filtered saline water.

Abstract: The invention concerns a plant comprising, on a vertical axis, a homogenizing vessel (1) followed by a settling vessel (2) and a flocculating vat (3). The homogenizing vessel (1) is fed by tangential intake (92) of the effluent and the input (611) and the output (612) of the upper tube (61) comprise a helical guide (613, 614) for driving the effluent in rotation. The lower tube (62) of larger diameter than that of the upper tube (61) is terminated by an outlet in the form of an upside-down cone (622) with reduced cross-section (621). The lower portion (31) of the flocculation vat (3) is truncated, with an apex angle, smaller than that of the upper portion (32), said lower portion (31) being parallel to the cone of the outlet of the lower tube (62), and anti-backflow cones (7, 8) surround the conduit (6) in the settling vessel (2).

Abstract: An aerator assembly for use in the aeration vessel of a wastewater treatment system comprising a rigid tubular member having an upper end and a lower end, and a diffuser assembly, the diffuser assembly comprising a flexible connector and a diffuser head, the flexible connector connecting the diffuser head to the lower end of the rigid tubular member and providing a fluid flow path between the tubular member and the diffuser head, the upper end of the rigid tubular member being adapted to be connected to a source of an oxygen-containing gas such as air.

Abstract: A system for the production of a blood component composition is provided. The system includes a centrifuge having a blood reservoir for receiving and separating a blood sample into multiple components; a dispenser disposed outside of the centrifuge having a first collection chamber containing an activation agent and a second collection chamber containing one or more medicinal agents; means for removing a first portion at least one separated blood component from the centrifuge to the first container and a second portion to the second collection chamber, wherein the first collection chamber activates the first portion and stores the resulting clot and thrombin; a filter for separating the thrombin from the clot; and a nozzle for entraining and mixing the thrombin with the second portion containing the one or more medicinal components.

Abstract: This invention relates to a process for removing solid matter from process liquids that are miscible with water. A brine made from water and dissolved salt and which is more dense than the process liquid is placed underneath and in contact with the mixture of process liquid and solid matter. The particles and pieces of solid matter move from the process liquid and then through the brine. In so doing the process liquid that is carried with the solid matter is displaced by the more dense brine.

Abstract: A filtration unit that includes a casing that has a closed bottom and is immersed in a water storage tank (or water storage pond) into which raw water is introduced, the casing being composed of a introduction port which introduces the raw water in the water storage tank into the casing, an active carbon supply device which adds active carbon to the introduced raw water, an agitator which agitates the raw water inside the casing to which active carbon has been added, a filtration module which filters the raw water, a back flow preventing device which prevents the raw water inside the casing from flowing back into the introduction port and being discharged into the water storage tank, and a discharging device which discharges the raw water from the casing.

Abstract: The present invention provides a dispensing apparatus and method for the delivery of remediation agents into waste systems wherein the apparatus is capable of generating and maintaining a controlled release of a concentrated remediation composition throughout the delivery cycle. The invention also provides a dispensing apparatus and methods wherein the remediation agent is a remediation agent that includes living organisms. Finally, the invention provides a waste water remediation dispensing apparatus and method useful in preventing dry trap in drain systems containing U-traps.

Abstract: Tank designs for magnetic seeding and separation for cleaning water. Magnetic seed are added to water to be treated and form magnetic composite particles or floc comprising the magnetic seed and pollutant particles bound thereto. Moving magnetized surfaces are utilized to collect the magnetic floc from the water to produce cleaned water. The magnetic floc are processed to separate the magnetic seed from a sludge which is ejected. Magnetized surfaces include rotating drums, disks, and walls or panels and moving magnetized belts.

Abstract: The present invention provides a dispensing apparatus and method for the delivery of remediation agents into waste systems wherein the apparatus is capable of generating and maintaining a controlled release of concentrated a remediation composition throughout the delivery cycle. The invention also provides a dispensing apparatus and methods wherein the remediation agent is a remediation agent that includes living organisms. Finally, the invention provides a dispensing apparatus and methods wherein compositions of remediation agents are conveniently formulated for specific applications providing a range of retention, activation and release profiles that optimize the remediation effectiveness.

Abstract: A system to collect by vacuum conveyance, separate, and discharge two mixed immiscible liquids with different specific gravities comprising a prefilter vessel 200, a vacuum tank 100, an optional heavy phase intermediate separation stage 40, and an optional light phase intermediate separation stage 30. Vacuum tank 100 is under a constant regulated vacuum, which sucks mixed immiscible liquids with different specific gravities from their respective remote source(s) through conduit(s) connected to vacuum tank 100. Collection conduits can have manually, mechanically, or electro-mechanically controlled valves at their source ends. Any grit, sediment, particles, and/or floatable debris in the collection conduits is first removed, and then any entrained air in the mixed liquid stream is removed, from the mixed liquid stream prior to undergoing any phase separation stages. Initial phase separation occurs automatically in vacuum tank 100 without any phase interface detection devices.

Abstract: An apparatus to separate solids from drilling slurry, having an inlet positioned over an outlet of a concentration tank to displace water that would otherwise enter the down-stream centrifuges. Baffles are provided to direct solids to the outlet and minimize the time that solids spend in the concentration tank. Fluids having solids removed therefrom are removed from the apparatus at a location remote from the outlet.

Abstract: The invention relates to a sewage treatment plant for treatment of waste fluid, said plant comprising at least one aeration chamber (2, 3), a settling chamber (4) and a disinfection chamber (5). In order to rationalize the layout and the structure of the sewage treatment plant (1), the at least one aeration chamber (2,3) and the settling chamber (4) are arranged in a structural unit comprising opposite end walls (101, 102), opposite side walls (103, 104), a bottom part (105) and a cover part (106). The disinfection chamber (5) is arranged separately outside one of said end walls (101, 102), side walls (103, 104), bottom part (105) or cover part (106) of the structural unit.

Abstract: A method of treating liquid including mixing coagulant with the liquid, introducing mixed coagulant and liquid into a primary reaction zone, containing an agitator, of a reactor which is substantially concentrically positioned with respect to a secondary reaction zone of the reactor, introducing flocculant into the primary reaction zone at a location between the agitator and where the mixed coagulant and liquid are introduced into the primary reaction zone, mixing the mixed coagulant and liquid with the flocculant and causing the resulting mixture to flow into the secondary reaction zone, introducing an encapsulating agent into the secondary reaction zone, recirculating the liquid and encapsulated flocs through the primary and secondary reaction zone, and passing the liquid and encapsulated flocs outwardly of the reactor, and an apparatus for treating liquids including a reactor, a draft tube substantially concentrically positioned within the reactor and being positioned such that the liquids may flow inwardl

Abstract: The Aerobic Treatment Plant with Filter Pipe (“ATPFP”) processes sewage for buildings not connected to a municipal sewer system. It employs a multi-stage process for cleaning sewage in a single, light-weight, easy-to-install unit. Sewage is initially cleaned in the aerobic tank, which is divided into an inner chamber and an outer chamber by a funnel-shaped clarifier hanging down in the aerobic tank, with the opening in the bottom of the clarifier held above the bottom of the aerobic tank. Air droplines hang down in the outer chamber of the aerobic tank, so that sewage in the outer chamber is aerated, stimulating aerobic microorganisms which digest the sewage. The sewage in the outer chamber then moves into the inner chamber inside the clarifier where gravity separates solids from the effluent. This cleaned effluent is then drained to the post-treatment tank for additional cleaning, where it may be chlorinated before it is filtered to screen out debris and then stored for discharge.

Abstract: An apparatus and method of diluting a solid particle-containing slurry in conjunction with a sedimentation process. A slurry is introduced into the launder portion of a feedwell and flowed vertically downward through an eductor nozzle having its exit location placed below the liquid level of a volume of clarified liquor. The eductor nozzle is positioned adjacent a diluent inlet such that discharge of the slurry through the eductor nozzle creates a low pressure zone, drawing clarified liquor through the diluent inlet for mixing and dilution of the slurry. A flocculating reagent may additionally be introduced into the diluted slurry for producing a floc and expediting settling of the solid particles.

Abstract: An apparatus and system are disclosed for retrofitting a septic tank from a failed residential wastewater treatment system to permit discharge to a surface water body rather than an underground drainage field. The apparatus is a chlorinating tank, comprised of a tank having an inlet and outlet pipe. An inlet diffuser and an outlet diffuser are posited within the chlorinating tank, the inlet diffuser is in hydraulic communication with the inlet pipe, and the outlet diffuser is in hydraulic communication with the outlet pipe. A filter is posited in the outlet diffuser for filtering any remaining solids in the treated wastewater. A chlorinating device is posited downstream of the filter within the chlorinating tank, for adding dissolved chlorine to the chlorinating tank volume.

Abstract: This metal containing waste water treatment method introduces a metal containing waste water from above into a submerged membrane separation tank 1 in which a reaction section 2, a submerged membrane section 3 having a submerged membrane 5 and a precipitation section 4 are arranged in order from top to bottom, causes a reaction by adding a pH adjuster to the reaction section 2, subsequently separates water from metal by the submerged membrane 5 of the submerged membrane section 3 and subsequently precipitates and concentrates the metal in the precipitation section 4. As described above, according to this treatment method, the pH adjuster is added to the reaction section 2, and therefore, solid-liquid separation can be effected by the submerged membrane 5 with a hydroxide formed. Moreover, the metal can be precipitated and concentrated by the action of gravity without using energy in the precipitation section 4.

Abstract: In this waste-water treatment system, solids suspended in waste water are attached to a radial ring-shaped thread structure 6 filled in an attachment filter tank 2. Then, particle sizes are increased and the attached solids are further made to be anaerobic, digested and reduced. Then, sludge generated from the suspended solids is sedimented, separated and removed in a sedimentation section 3 in the same attachment filter tank 2. In this waste-water treatment system, solids suspended in waste water can be filtered without consuming a large amount of electrical energy. Thus, energy can be saved and waste can be reduced.

Abstract: A sample separation apparatus including a porous, or rough, capillary column. The porous capillary column includes a matrix which defines pores, and may be formed from a material such as porous silicon. Alternatively, the capillary column may have a rough surface of hemispherical grain silicon. The capillary column is defined in a surface of a substrate, such as silicon. The sample separation apparatus may include a stationary phase or a capture substrate disposed on the surfaces thereof. The sample separation apparatus may also include a detector positioned proximate the capillary column. A variation of the sample separation apparatus includes an electrode proximate each end of the capillary column. The sample separation apparatus may be employed to effect various types of chromatographic separation, electrophoretic separation, and analyte identification.

Abstract: A process for treating contaminated fluid is disclosed. An apparatus for treatment of contaminated fluid comprises: an integral tank; an inlet for introducing a mixture of flocculent polymer and contaminated fluid; a mixer in the bottom of an innermost cylinder that has first stage aerating means; a rotary skimmer above the fluid level of the innermost cylinder and a second stage aeration cylinder that has second stage aerating means surrounding the innermost cylinder; a de-aeration baffle on the same plane as the rotary skimmer and extending around an outermost cylinder; fluid level control means between the second stage aeration cylinder and the outermost cylinder, directing fluid flow from the second stage aeration cylinder out of the tank; means for powering the mixer and the rotary skimmer; and an outlet permitting clear fluid to exit the tank and an outlet permitting waste effluent to exit the tank.

Abstract: A unitary liquid flow separator-collector-distributor controls the flow of liquid streams in liquid treatment tanks and treatment methods that can utilize the entire cross section of the vessels in which the treatment takes place.

Abstract: The invention relates to a device and a method for chemically and physically separating solid materials from a suspension using flotation. A rotationally symmetrical flocculation/flow reactor is provided with outlets in the lower part thereof and is arranged in a separating tank. At least one suspension inlet extends eccentrically into said reactor. The supplied suspension is guided into said reactor. The supplied suspension is guided into the upper area of the flocculation reactor via the suspension inlet. A circular flow is thus created which drains off from the flocculation reactor downwards in a tangential and radial manner over the outer circumference into circularly arranged distribution cells which reinforce the tangential component of the suspension flow when said flow is delivered into the separating tank. In prior art, the flow of the mixture consisting of the suspension and air-sacs extends radially outwards.

Abstract: A wastewater treatment equipment is provided with a reaction tank and a separate reaction unit installed in the reaction tank. In the separate reaction unit, a reaction different from a reaction in the reaction tank is carried out with returned sludge and a acid or alkali. Reactants are generated from the returned sludge in the separate reaction unit and then introduced from a bottom portion of the separate reaction unit into the reaction tank so as to be used for wastewater treatment.

Abstract: The present invention involves an improved integrated reactor and solids settler system for solids removal from a water stream. The integration of the rapid mix reactor and the solids settler of the present invention uses an overflow line from the rapid mix reactor to eliminate both the rapid mix reactor level indicator and controller and the flow controller in the solids settler clarified water outlet. The proposed design is simple, cost effective, and eliminates the possibility of unnecessary downstream unit shutdowns.

Abstract: An apparatus for treating wastewater including a physical-chemical reactor; a chemical supply operably connected to the physical-chemical reactor; a clarifier operably connected to and located downstream of the physical-chemical reactor; a ballast recirculation line operably connected between the clarifier and the high rate physical-chemical reactor; and a control system that directs a) influent into 1) the clarifier but not the physical-chemical reactor when flow or pollutants of the influent is within a selected low range and 2) the physical-chemical reactor and then into the clarifier when the flow/pollutants of influent is within a selected higher range and b) internally generated ballast into the physical-chemical reactor through the ballast recirculation line when the pollutants and/or flow is within the selected higher range.