Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a post treatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post treatment filter preferably comprises a zeolite filter.

Abstract: A water boiler system for producing steam or hot water includes an apparatus for removing dissolved minerals from the boiler water without the use of water softeners or other chemical treatment agents. An electromagnetic flux producing device first treats water of the boiler system with alternating electromagnetic flux to cause nucleation of dissolved minerals in the bulk boiler water, rather than on boiler surfaces, with nucleated particles then accumulating into particulates which settle by gravity to a low area of the boiler. Water is continuously drained from the low area of the boiler and fed by a pump to a mechanical separator which continuously separates solids from the drain water and continuously passes cleansed water at a high temperature back to the boiler.

Abstract: A packaged wastewater treatment unit has a compact configuration into which all subcomponents may be integrally molded. The compactness of the unit results from the arrangement of the subcomponents within the unit. In one embodiment, a clarifying unit and a basin into which a biological digester is mounted are formed within the top surface of a tank. The interior of the tank contains a collecting compartment separated from a secondary compartment by a baffle. In another embodiment, the housing of a disinfecting unit, such as an ultraviolet or chlorination unit, is also formed within the top surface of the packaged system. A method for treating wastewater includes using a single integrated unit to feed an effluent stream to a collection tank and then transport it to a biological digester, clarifying unit, and disinfecting unit. The effluent stream may be transported through the unit by a series of pumps and spillways. Optionally, the output stream may also be subjected to a sand filtration unit.

Abstract: An acid recovery system used in a hydrolysis operation includes a chromatographic unit to provide initial separation of sugar and acid. The sugar product provided by the chromatographic unit is processed to produce higher value products, such as ethanol. The remaining acid is contaminated by sugar. A nanofiltration unit containing a nanofilter membrane processes the sugar contaminated acid. The acid is allowed to permeate across the nanofilter membrane while sugar is rejected. The permeate is provided to a conventional acid recovery system and recycled for use in the hydrolysis process.

Abstract: The invention relates to a method and apparatus for filtering or purifying water.

Abstract: The invention relates to a method and apparatus for recycling a wash solution used in powder coating which uses filters. The invention also relates to methods and apparatuses for recycling wash solutions used in spray washing, steam cleaning or car washes using filters.

Abstract: Disclosed are efficient municipal wastewater treatment apparatus and process characterized in that the nitrogen is removed by nitrification and denitrification reaction in the cyclic aeration reactor wherein Anaerobic state, Anoxic state and Oxic state are change into time concept in a single reactor, and the untreated organic materials are further removed by the 24-hour-continuous reactor.

Abstract: A septic tank (11) having two separate compartments, a trash tank (13) and a mix liquor compartment, using aerobic bacteria to process waste, and methods of its use. A settling compartment allows heavy particles to settle while keeping lighter debris out of a pump (47).

Abstract: A wastewater processing and treatment system utilizes aerobic bacteria in two separate compartments to break down and digest waste. The first settling compartment between the trash tank and the mix liquor compartment is non-existent in conventional aerobic units. The first settling compartment allows for settling of heavy particles and keeps floating debris out of the circulating pump that is located in the mix liquor compartment. In the mix liquor compartment, 100% of the liquid is blended with air several times per hour to increase the efficiency and performance of the unit. The pump intakes on the bottom of the mix liquor compartment allow the pump to remove sludge build-up.

Abstract: A water treating device includes a water container for containing water; an electrolyzing chamber for sterilizing water; a water treatment line which couples the electrolyzing chamber with the water container; a sensor for measuring residual chlorine concentration; and a device for controlling the amount of the water to be electrochemically decomposed in the electrolyzing chamber on the basis of the residual chlorine concentration measured by the sensor to keep the residual chlorine concentration of the water to be fed back into the water container within a predetermined range. A bypass line is provided which is branched from the water treatment line upstream of the electrolyzing chamber for sampling the water, introducing the sampled water into the sensor for the measurement of the residual chlorine concentration thereof, and discharging the sampled water into the electrolyzing chamber after the measurement.

Abstract: A system and method for storing and purifying used hydraulic fluid removed from an aircraft hydraulic fluid system includes a purification system that mounted on transportable cart. Used hydraulic fluid is transferred from an aircraft to a salvage tank that is mounted on the transportable cart. A hydraulic fluid purification module is also mounted on the transportable cart and is part of the purification system. The purification system may be fluidly coupled to an external system that supplies a motive source of flow energy, and may be selectively configured so that the used hydraulic fluid in the salvage tank passes through the purification module.

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: A liquid reconditioning system separates mixtures of two liquids that are insoluble in one another, such as a coolant and tramp oil from a machining operation. The mixtures of the two liquids are delivered from a sump, or collection basin, to a separator by means of a venturi pump. A tank is provided for holding the two liquids after they are separated whereby they may be individually removed from the holding tank. One of the separated liquids, in the case of a coolant and tramp oil, the coolant, is pumped through the venturi pump to create the vacuum, or negative pressure, that draws the mixtures of the two liquids from the sump to the separator.

Abstract: The present invention relates to methods and apparatus for separation of solids from liquids and separation of liquids from liquids (such as oil from water) by dissolved gas floatation. A dissolved gas floatation clarifier is described as is a liquid-gas mixer, a liquid-liquid mixer, and solid-liquid chemical feeders. The methods and apparatus of the present invention are particularly suitable for supplying dissolved air and mixing of chemicals for use in separation of solids in dissolved air floatation clarifiers.

Abstract: A self-cleaning water filtration system includes a pre-filter to filter oils and relatively medium sized particles in a water flow, a multi-stage filter to purify and provide a second level of filtration to the water flow, and a self-cleaning filter to provide a third level of filtration to the water flow. Water flow through the filter media of the self-cleaning filter is redirected to flush waste to a containment-tank filter. The self-cleaning filter has a purge output, which may spray the pre-filter to substantially remove particles from the pre-filter for collection in the containment tank. The multi-stage filter may have at least two layers of filter media. The pre-filter may be disposable and comprised of a mineral sanitizer positioned between two layers of an oil absorbing fabric.

Abstract: This invention is directed to processes designed to recover water used in certain aspects of the processing of poultry, treat the recovered water to remove solids, fats, oils and greases, animal proteins and pathogenic organisms and to reuse the treated water for poultry processing operations. Although the reuse points will vary from plant to plant depending upon specific water consumption volumes, type of processing operations conducted by the facility and regulatory requirements and approvals, there are a number of reuse points which are preferred based upon treated water quality requirements, material balances relating to the capacity to recover process streams and the consumption volumes at the identified reuse points, and source waters that have been shown to have the least total contaminant loading.

Abstract: A reactor chamber for placement in a wastewater treatment system, where the reactor chamber has a chamber formed from a sidewall which forms an interior of the chamber. The sidewall has a top portion and a bottom portion and fixed channel growth media positioned in the interior of the chamber. The fixed channel growth media is positioned below the top of the sidewall, so that when positioned in a treatment system, most of the growth media is located below the water level in the treatment system. The top of the sidewall near the water level (when positioned in a treatment system) is substantially impermeable to wastewater. The reactor includes an air distribution manifold system having a series of air release sites positioned below the fixed channel growth media and adapted to release air which disperses upwardly through the fixed channel growth media.

Abstract: The invention relates to a method and apparatus for recycling a wash solution used in powder coating which uses filters. The invention also relates to methods and apparatuses for recycling wash solutions used in spray washing, steam cleaning or car washes using filters.

Abstract: A filtration apparatus includes a laundry waste sump, a primary 50 micron static screen filter, a 9,000 gallon equalization tank, at least one secondary media/carbon filter, a sludge holding tank with a pump to return excess water to the equalization tank, a backwash pump, an air blower, and a clear well tank water source for backwash. An exemplary embodiment of the invention also includes a surge tank between the primary and secondary filters and a surge tank between the secondary filter and the clear well tank.

Abstract: Methods and apparatus for removing sediment from a liquid are provided. Pulses of pressurized air are directed into a conduit having an inlet disposed within a first liquid-containing vessel adjacent to (or within) the sediment to cause a slurry of liquid and sediment to flow through the conduit into a second vessel elevated above the first vessel. The slurry of liquid and sediment is allowed to drain from the second vessel into a third vessel that is positioned at an elevation lower than the second vessel. Liquid is drained from the third vessel (to another vessel or elsewhere) as sediment accumulates within the third vessel. The third vessel may be removed when accumulation of sediment therewithin reaches a predetermined amount. The accumulated sediment within the third vessel is removed and the third vessel is returned to service, or another empty vessel may be substituted therefor.

Abstract: A media used in conjunction with any system than is comprised at least of a septic or anoxic tank followed by an aerobic or alternating aerobic/anoxic treatment unit that is providing nitrification. The media enhances denitrification of effluent that has been recycled from the nitrification unit to the anoxic tank. The is comprised of a number of synthetic cords with a specific gravity less than the specific gravity of the effluent. The cords are attached to the bottom of the septic or anoxic tank. The cords will float in the liquid flow stream of the septic/anoxic tank providing a number of surfaces for fixed film organisms.

Abstract: A system and method for treating and removing hydrocarbon and other contaminants in bilge and ballast water, utilizing a multiple progressive process that chemically and electrically treats-and removes contaminants. Wastewater, received by a sump, is transmitted to a holding tank and treated, over a period of time while-influent wastewater continues off loading. The wastewater is pumped to an oil/water separator tank that decants free-floating oil from the wastewater to an oil retention tank. The wastewater then undergoes an electrocoagulation process where emulsions are broken and compounds that further aid treatment are created. The treated water flows to a retention/separation tank where contaminant particles coalesce and separate. Water is decanted and transferred to a clean water holding tank through an ozone injection system and an activated carbon filter. Treated water is recirculated until it exits the system meeting discharge limits for organics and metals allowing release into the environment.

Abstract: A water treatment and recycling system to provide grey water and crystal clear water to a stone processing system including crystal clear water stone fabrication equipment requiring crystal clear water and grey water stone fabrication equipment capable of using grey water. The system includes a waste water storage tank connected from the waste water discharge ports of the crystal clear water and grey water stone fabrication equipment, a grey water supply loop for pumping waste water from the waste water storage tank as grey water to the grey water stone fabrication equipment and a crystal clear water supply loop for pumping waste water through a high pressure filter to convert the waste water into the crystal clear water, and a crystal clear water supply pump for pumping crystal clear water to crystal clear water stone fabrication equipment. The high pressure filter includes a frame holding a filter stack.

Abstract: The present invention relates to a process and a system for processing waste water containing organic compounds. The system includes a UV/ozone oxidation removal module, or one or more removal modules connected in series whereas such a serial connection can be continuous or discontinuous. A UV/ozone oxidation removal module mainly includes an ozone generator, an ozone injector, an ozone dissolution tank, an ozone decomposition device, a UV reaction tank, a recycling pipeline. The efficiency of the UV/ozone oxidation removal module is controlled by the recycling ratio, the ozone concentration, and the intensity of UV light.

Abstract: A clarification system for fluids in which particles are separated from the fluid by flotation and in which the buoyant media inducing the flotation is recycled. Flotation can be assisted by a flotation assistance device, such as dissolved air flotation.

Abstract: The invention is a system for the processing and recycling of water. Rain water or snow from a roof or other areas that collect rain water is transferred via a down spout to a rain water storage vessel. This water is transferred with a holding tank transfer pipe from the vessel to an unpurified water reservoir. A second source of water is the household domestic waste water, defined as gray water, transferred via waste water pipe to a septic tank then via discharge pipe to a open bottom ground reservoirs. The water from the dry well is transferred via unpurified water reservoir pipe from the dry well to the unpurified water reservoir. A third source of water, well water, (which can include commercial water) is transferred via well water pipe to the unpurified water reservoir. Water from the unpurified water reservoir is dispensed via a water distribution mechanism. The water distribution system further has a suction pipe which ducts water to a purification distribution system.

Abstract: Material balance is maintained in a recycling system for aqueous paint by controlling a liquid amount within the recycling system while spray-coating an article. A recycling method includes: coating an article with aqueous paint in a water-curtain-type coating booth; collecting an over-spray paint, that does not adhere to the article, by virtue of a water curtain; sending a collected solution of paint and water to a condensation bath through a booth circulation water bath; separating this solution by an ultra-filtration apparatus into condensed paint and filtrate, with the condensed paint being transferred to a paint tank; and removing condensed paint from the paint tank, if necessary for adjustment of aqueous paint, followed by coating this aqueous paint onto an article, wherein a total amount of liquid present within the recycling system is controlled to be constant during spray-coating of an article.

Abstract: A multifunctional pure water maker includes a main body and a reverse osmosis module. The main body includes a base portion and a column extending from the base portion. A water container is removably placed on the base portion. A control cap is pivotally attached to the column and includes a compartment in an underside thereof. An outlet pipe is mounted in the control cap and has an end communicated with the reverse osmosis module. Water purified by the reverse osmosis module flows through the other end of the outlet pipe into the water container when the control cap is in a closed position covering an opening of the water container. A limit switch is mounted in the control cap such that the reverse osmosis module is activated to proceed with production of pure water when the control cap is moved to the closed position and that the reverse osmosis module is deactivated when the control cap is moved to an open position.

Abstract: The invention relates to an aerobic wastewater digestion unit useful for degrading organic material dissolved or suspended in a wastewater stream. The wastewater is fed to a vessel, wherein it is circulated by a liquid conveyor between the vessel and a downwardly-directed tube. Expulsion of fluid from the tube into the lower portion of the vessel agitates the liquid in the vessel and disperses into the liquid air that has been entrained in the liquid in the tube. The digester can be operated using varying liquid levels, and is amenable to batch, semi-batch, and continuous operation. The digester is suitable for use in combination with other components of wastewater treatment systems, and can be included as a module in modular wastewater treatment systems.

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: A transportable drilling fluid cleaning system for removing solids from drilling fluid at a drill site comprises a platform for transporting the system. A bin region on the platform retains solids from the drilling fluid. A settling tank on the platform separates the drilling fluid into an upper fluid fraction having a reduced concentration of solids and a lower solids fraction having a higher concentration of solids as the drilling fluid flows from an inlet chamber for receiving drilling fluid to at least one other chamber. A stand on the platform supports at least one centrifuge for separating the solids from the drilling fluid, the stand being movable between stored and operating positions. The system provides a self-contained unit that is easily transportable on a flat bed truck to provide all the ancillary equipment necessary for solids control at the drill site.

Abstract: Make-up water derived from an on-shore treatment facility is returned to a slurry processing unit on board a dredge by means of a water supply pipeline floating alongside a slurry delivery pipeline that conveys dredged material to the on-shore treatment facility. After separation from the slurry solids, the return water is pressurized to a transport pressure at the treatment facility with a centrifugal pump and then boosted to the desired working pressure once aboard the dredge. This two-stage pumping and re-cycling process reduces the amount of clear make-up water needed for proper operation of the slurry processing unit by more than 50%. This has resulted in a substantial reduction in the overall cost of remediation by reducing the amount of water that must be cleaned prior to disposal.

Abstract: An apparatus and method for recovering wastewater from laundry operations. A substantially closed loop series of tanks, conduits and pumps hold and transfer water output from a wash machine through a series of filters, including a lint pulloff filter, a multimedia pressure filter, a clay filter, and a carbon filter. The water is ozonated to coagulate suspended solids and to disinfect and is subjected to ultraviolet light to disinfect and to reduce residual ozone.

Abstract: The invention relates to a device for using various types of coupling system to connect together a tube (2) and a filter housing (3). According to the invention, the device comprises: a head plate (21) independent of the type of coupling system, the head plate being fixed to the housing (3) and being provided with passages (22) opening out into a bearing face (23) of the head plate; for each backing-plate (Pi) of given type, a first bearing face (25) complementary to the bearing face (23) of the head plate (21) and a second bearing face (29) adapted to co-operate with a flange (B1) of corresponding type; a sealing gasket (28) interposed between the first bearing face (25) of a backing-plate (Pi) of a given type and the head plate (21); and releasable connection means (30) between the head plate (21) and each backing-plate (P1) of a given type in order to provide sealing between them.

Abstract: A wastewater treatment system for use on marine vessels or land-based applications treats wastewater by solids separation and oxidation. The system includes a solids separation tank, an oxidation tank having a plurality of chambers and a fluid circuit for re-circulating treated wastewater into the solids separation tank and oxidation tank for further treatment. An ozone generator produces ozone which is dissolved in the treated wastewater in the re-circulating fluid conduit and is used for the solids separation and oxidation processes. The treated wastewater is periodically discharged into the environment.

Abstract: A new biofilm-activated sludge Sequencing Batch Reactor (SBR) treatment process for sewage or wastewater has successfully been developed as the third generation SBR (SBR3). This new SBR3 process utilizes a multi-stage and multi-sludge SBR configuration receiving either continuous or intermittent inflow of wastewater. Each stage has individually controlled continuous or alternating anaerobic/anoxic/aerobic operation, with or without mixing and recycling from the other stage(s). The configuration and operation is dependent upon the treatment objectives and effluent discharge requirements. In the preferred embodiment, carriers are used to facilitate control of operating conditions.

Abstract: Provided is an apparatus for processing sewage by granulating activated sludge and a method thereof.

Abstract: Methods and apparatus employing membrane filtration in biodegradation processes for treatment of wastewater are described. A bioreactor system is described having an equalization system, a membrane bioreactor system, and a controller. Aeration systems for a membrane bioreactor, such as a mixer, and an ultrafilter subsystem are also described, as is a rotary membrane ultrafilter.

Abstract: This invention is directed to processes designed to recover water used in certain aspects of the processing of poultry, treat the recovered water to remove solids, fats, oils and greases, animal proteins and pathogenic organisms and to reuse the treated water for poultry processing operations. Although the reuse points will vary from plant to plant depending upon specific water consumption volumes, type of processing operations conducted by the facility and regulatory requirements and approvals, there are a number of reuse points which are preferred based upon treated water quality requirements, material balances relating to the capacity to recover process streams and the consumption volumes at the identified reuse points, and source waters that have been shown to have the least total contaminant loading.

Abstract: An apparatus for treating water through a magnetic field comprises an inverted vortexing ampul capable of holding water, the vortexing ampul having a wide body and a narrow neck. A water inlet located inside the vortexing ampul at its wide body portion is used to introduce water along an inner side of the vortexing ampul thereby facilitating flow in a vortexing pattern. A valve controls the flow of water. A pair of axially placed magnets are aligned around the neck of the ampul. A recirculating ampul for the collection of the treated or “living water” is included. A collar of paramagnetic material may be located close to the axially placed magnets. The apparatus includes a circulating system that pumps processed water from the recirculating ampul for reprocessing.

Abstract: An apparatus for treating water contaminated with metal sulfates and sulfuric acid such as acid mine drainage (AMD) which in part recycles high pH effluent from later steps in the process back to the earlier steps of the process. The recycled high pH effluent added with magnesium hydroxide to the entering AMD generates precipitates separable from the stream to leave sulfate ladened water. A tangential filtering process is used to separate the sulfate ladened water into one stream of pure water and a second stream containing sulfate. One portion of the second stream is treated with ammonia to yield a cake of ammonia sulfate and aqueous ammonia. Ca(OH)2 is added to another portion of the second stream to produce calcium sulfate cake and the high pH effluent that is recycled back to the first step in the cycle.

Abstract: A digester is provided for aerobically and microbially digesting a batch of bodily waste material, such as an aqueous slurry of pig manure. The digester comprises side-by-side digestion and separation compartments, separated by a partition wall. A first slanted pipe extends through the wall and has its inlet at the lower end of the separation compartment. Pressurized air is injected into the inlet so that slurry from the separation compartment is drawn into the bore of the first pipe, is mixed and aerated therein and is ejected into the slurry in the digestion compartment as a powerful jet. The jet establishes a vertical circulation in the digestion compartment. Slurry, containing undigestible solids, drains through a second pipe from the central core of the circular flow into the separation compartment. Here the aerated non-digestible solids tend to float and can be removed.

Abstract: The invention provides the continuous, integrated methods and devices for substantially removing ionized and ionizable carbon compounds from an aqueous stream by first deionization step to produce a first product stream, ionizing nonionized and nonionizable carbon compounds in such stream to form further ionized and ionizable compounds, and removing the latter by a second deionization step. The method can be performed for example in an apparatus including an EDI unit (10), an ionizing unit (60), and EDI unit (100).

Abstract: A device and method for the treatment of effluent with activated sludge in suspension, for the removal of nitrogen and phosphorus and for simultaneous sludge stabilization. An activated chamber has a fermentation zone, a denitrification zone and a nitrification zone, whereby the fermentation zone and the denitrification zone in the activated chamber, are separated by scum boards and overflow barriers in the direction of flow, providing ascending flow and descending flow chambers in the anaerobic fermentation zone and the denitrification zone.

Abstract: A treatment system for use in a water delivery system for eradicating bacteria such as the Legionella bacteria. The treatment system includes an ultraviolet light source for killing bacteria entering the water delivery system, an electrochemical precipitation unit and a blending valve in communication with water discharged from the precipitation unit and a source of hot water.

Abstract: Apparatus for the treatment of a wiping solution, which includes ink flocculation apparatus for flocculating ink contained in a used wiping solution by the addition of a flocculant to the used wiping solution; solid-liquid separation apparatus for separating, into sludge and a filtrate, the used wiping solution containing the ink which is flocculated by the ink flocculation apparatus through filtration of the used wiping solution; distilled water production apparatus for producing distilled water and a concentrated solution through heating of the filtrate which is separated by the solid-liquid separation apparatus; water recycling apparatus for recycling the distilled water which is produced by the distilled water production apparatus as a raw material of a wiping solution; and post treatment apparatus for separating the concentrated solution into steam and a solid residue through heating of the concentrated solution which is produced by the distilled water production apparatus.

Abstract: A filtration apparatus includes a laundry waste sump, a primary 50 micron static screen filter, a 9,000 gallon equalization tank, at least one secondary media/carbon filter, a sludge holding tank with a pump to return excess water to the equalization tank, a backwash pump, an air blower, and a clear well tank water source for backwash. An exemplary embodiment of the invention also includes a surge tank between the primary and secondary filters and a surge tank between the secondary filter and the clear well tank.

Abstract: A paint overspray particulate filtration system includes a collection tank, a floatation consolidation tank, and a vacuum filter assembly having a filter medium that traverses a pair of vacuum chambers. A positive displacement vacuum producer for the first vacuum chamber discharges a first supply of pressurized air at a temperature preferably greater than about 170° F. and a pressure preferably greater than about 6 psig, while a centrifugal compressor discharges a second supply of pressurized air at a temperature of perhaps up to 110° F. and at a pressure of perhaps 4 psig. The first pressurized air supply is heat exchanged with the second pressurized air supply, whereupon the cooled first pressurized air supply is directed through a submerged diffuser nozzle to aerate the collection tank and/or the consolidation tank. The warmed second pressurized air supply is directed onto the paint sludge carried atop the filter medium to enhance sludge dewatering.

Abstract: A closed bioreactor for high organic carbon removal and ammonia conversion in high-strength wastes under microgravity conditions. Oxygen is provided to the bioreactor by diffusion through a non-porous hydrophobic membrane in a recirculation line, allowing a high rate of oxygen transfer while minimizing the opportunity for formation of bubbles. Operating the bioreactor as a closed unit at elevated pressures keeps the oxygen in the dissolved phase. The oxygen transfer within the reactor is thus much more efficient and uniform than in similar reactors having both a liquid and gaseous phase.

Abstract: A device for diverting the flow of liquid in a wastewater treatment system in flow communication with effluent returning from a recirculating treatment section and in flow communication with a discharge line for removing a portion of treated effluent to a receiving body. The device also has openings for returning a percentage of the effluent back to the wastewater treatment system. A valve operatively responsive to a float in the treatment system whereby when the effluent level in the system falls below a critical point, all of the effluent is recirculated back into the treatment system and when the effluent level rises sufficiently a percentage of cleaned effluent exits the system.