Abstract: Disclosed is a process and apparatus for purifying a low polluted water containing concurrently or selectively inadequate matters including heavy metals such as iron contents and manganese, and fine suspended matters, which comprises adding a reactant primarily containing a colloidal silica from a reactant charger to the polluted water stored in a primary tank to emulsify the inadequate matters; adding a coagulant primarily containing chitosan into the polluted water from a coagulant charger; feeding external air under high pressure by a pump into the polluted water, and separating the air from the polluted water, followed by dissolution of the air under pressure in the polluted water using a water separator; injecting the thus treated polluted water into a polluted water stored preliminarily in a secondary tank to generate very fine bubbles in polluted water stored in the secondary tank under releasing of the pressure; allowing the inadequate matters emulsified and flocculated to float up onto the water surf

Abstract: An improved food, oil and grease accumulating apparatus and method of use is disclosed. The improved apparatus includes a pump station to discharge contaminated effluent at a higher flow rate at periodic intervals into a first food separation station for removing food particles. Effluent leaves the food separation station into a second food separation system and then an oil and grease separation station which uses an oleophillic material to attract and coalesce oil and grease particles and permit their advancement along channels to the top region of the oil and grease separation station. The oil and grease are removed through an evacuation system while the water is permitted to discharge from the oil and grease separation station into the sewer system.

Abstract: A sequencing batch waste treatment facility with pretreatment mixing and equalization by mixing with selectively bred bacteria to achieve a selected waste to bacteria ratio, wherein waste is treated and reduced to acceptable biological oxygen demand levels for municipal-type waste treatment or general discharge per regulatory permit. A treatment colony of mature bacteria is cultivated and maintained in a treatment tank while a colony of young bacteria, separate from the treatment colony, is selectively bred in a bacteria tank to be particularly adapted to digest the waste being treated. Newly received waste is mixed to break macroscopic solid waste apart, into microscopic solid waste and to blend solid waste and liquid waste components into a waste slurry. Some of the selectively bred bacteria are portioned and mixed into the waste slurry up to an equalization point. The equalized batch of waste slurry is subsequently transferred to treatment.

Abstract: Apparatus combination and system for reducing use of fresh water in a photoprocessing operation by recirculation of the wash water to the photoprocessing operation via a silver recovery system. Wash water is periodically discharged to waste and a like amount of fresh water is added to the system which serves to reduce the concentration of thiosulfate ions in the wash water.

Abstract: A discharge purification system for dry cleaning facilities is disclosed. The system comprises a series of concentric tanks providing settling and filtration treatment for water containing dry cleaning solvents. The device also provides for recycling solvent back to the dry cleaning facility.

Abstract: An apparatus includes a frame carrying a process tank, ozone generating tubes, a venturi, and an infusion chamber for treating water with ozone. A pump circulates water from the process tank and through the venturi to the infusion chamber. The infusion chamber is connected immediately downstream from the venturi. The infusion chamber has a predetermined pressure to produce a head space and thereby generate a relatively large number of bubbles of relatively small size to enhance the mass transfer of ozone into the water. A length of tubing is connected downstream from the infusion chamber to enhance the contact time between the ozone and the contaminants. An ozone generator tube including an inner electrode formed of a mass of helical windings produces a high concentration of ozone from a cooled air supply.

Abstract: Water-based industrial cleaning solutions are stripped of mixed oil and high density particulate (dirt) contamination by a full or partial flow system through, first, a centrifugal separator to produce two effluent flow streams respective to low and high density contamination. Each centrifugal separator effluent stream is conducted to and through respective gravimetric separators producing three effluent streams each. The two purified cleaning solution streams are combined for recycling. The two oil effluent streams are combined for disposal. The two particulate dominated streams are combined for screen or matrix filtration.A small side stream such as effluent from the screen or filter is treated with ozone for bacterial control prior to recombination.

Abstract: The present invention provides a method for removing contaminants from a waste fluid stream. The method includes contacting a waste fluid stream with a promoter of hydroxyl radicals to entrain the promoter of hydroxyl radicals in the waste fluid stream, passing the waste fluid stream having the promoter of hydroxyl radicals entrained therewithin along a substantially tortuous path to allow the promoter of hydroxyl radicals to dwell within the waste fluid stream and to further entrain the promoter of hydroxyl radicals in the waste fluid stream, and irradiating the waste fluid stream with ultraviolet radiation. The present invention also provides an apparatus for removing contaminants from a waste fluid stream.

Abstract: A fluid treating apparatus and method for treating fluid to remove undesirable constituents contained therein are disclosed. The apparatus and method include employing a bed of metal particulate matter. The metal particulate matter is preferably chosen from metals having: favorable redox potentials relative to the redox potentials of the undesirable constituents so as to establish conditions for spontaneous oxidation and reduction reactions between the undesirable constituents and the metal particles and/or having bacteriostatic or bactericidal properties in the case where the undesirable constituent sought to be treated is a bacteria.

Abstract: A wastewater treatment system includes inner and outer relatively telescopic units, the outer telescopic unit including an outer container having a bottom wall and a peripheral wall collectively defining a generally upwardly opening chamber, a filter exteriorly of the peripheral wall and defining therewith a first downstream settling zone, control openings in the peripheral wall for controlling wastewater flow through the first settling zone generally in response to the level of wastewater in the first settling zone, the inner telescopic unit including an inner container having a chamber defined in part by a peripheral wall, the peripheral walls being in relatively spaced relationship to each other and therebetween defining a second settling zone, a third settling zone within the inner telescopic unit chamber, and the inner and outer telescopic units each being a distinct unitized structure which permits the same to be bodily telescopically assembled and disassembled.

Abstract: A closed loop liquid treatment system for removing particulate matter and hydrocarbon waste from a contaminated liquid uses passive filtering systems in combination with an active microbe solution to remove particulate matter and to reduce hydrocarbons to fatty acids and carbon dioxide. A plurality of like stages may be employed to enhance the process. The treated liquid may be used in a closed loop system including a work station to which the liquid is recycled.

Abstract: A tertiary treatment unit is provided that has a first filtration unit operatively connected to an influent for filtering solids therefrom to form an effluent, a second filtration unit operatively connected to the first filtration unit to receive the effluent and to filter finer solids and bacteria and viruses from the effluent, a supply tank operatively connected to the effluent to provide chemicals that are mixed into the effluent, and a reactor that receives the effluent and removes nitrogen and some phosphorous therefrom to form a treated effluent. The treatment unit further has a first adsorption unit that receives the treated effluent and adsorbs additional nitrogen, BOD, TSS and certain chemicals from the treated effluent, and a second adsorption unit that receives the partially adsorbed treated effluent from the first adsorption unit and adsorbs additional phosphorous from the treated effluent to form the final effluent.

Abstract: Waste water is disposed in a flocculation mixing tank 1, an anaerobic tank 2 and an aerobic tank 3 connected in series. First, a dephosphorization flocculating agent and, if necessary, a polymeric flocculating agent are added to waste water in order to produce and grow phosphorus-containing flocs therein. Then, to the water is added a recycling solution from an aerobic tank 3, said solution containing nitrates and nitrites. The mixture water is charged in an anaerobic tank 2 until microbially decomposable components (herein referred to BOD components), nitrates and nitrites are anaerobically and microbially decomposed and gas is produced. In the aerobic tank 3 is charged a supernatant solution from the anaerobic tank 2, said solution containing ammonium compound and BOD components, to nitrates, nitrites and CO.sub.2. At least a part of supernatant solution containing the nitrates and nitrites is recycled to the anaerobic tank 2. Solids discharged from the anaerobic tank 2 and the aerobic tank 3 are wasted.

Abstract: A bottle water disinfectant, storage, and dispensing system for purifying drinking water or the like. The preferred embodiment of the present invention contemplates a bottle water dispensing system having an inlet line, a storage tank, a filter area, and a dispensing port, wherein there is provided the steps of infusing water flowing into the storage tank with a disinfecting medium such as iodine, chlorine or the like, allowing the infused water to remain in the storage tank for a period of time to allow the disinfecting medium present in the stored water to kill all microbes and the like in the water, and selectively dispensing the stored water, including the further steps of filtering the disinfectant medium and remaining contaminants from the stored water.

Abstract: A multi-section manifold system containing a number of replaceable filter and purification cartridges for treating the water supply of medical and dental facilities. The system operates to introduce increased concentrations of a preferred bactericide to the water immediately adjacent patient dispensing appliances. Control valving regulates and segregates flow through separate cartridges at the manifolds. A first manifold removes coarse particulates and sediment and exposes the water to an initial bactericide. A second manifold removes finer contaminants. A third concentrator manifold contains a bactericide cartridge having a percolation chamber which enhances the iodine concentration of the water in the range of 3 to 10 ppm at the patient dispensing apparatus. The percolation cartridge includes proximal and distal bactericide chambers which are, separated by an intermediate reservoir or percolation chamber.

Abstract: A machine coolant recycling system has a holding tank in which machine coolant to be recycled is accumulated. The machine coolant in the holding tank is continuously filtered for a predetermined period of time and the surface of the machine coolant is continuously skimmed to remove undesired contaminants therefrom. The machine coolant from the holding tank is supplied to a centrifuge where it is centrifuged and is then pumped to a blending tank where it is chemically tested and reconstituted to its original composition. The machine coolant is then again continuously filtered until it is needed.

Abstract: An apparatus for removal of organic materials from water includes a reactor for photocatalytic oxidation and/or ionization of organics in the water stream and an ion exchange column for removal of CO.sub.2, dissolved acids, and ionized organics formed in the reactor from the water stream. The reactor includes an elongated flow chamber having an inlet at one end and an outlet at the opposite end. A photocatalytic material is provided as a surface layer on a number of solid members in the chamber, typically a number of rods extending generally parallel to the axis of the flow chamber. The catalyst may be TiO.sub.2 formed by oxidizing the surface of Ti rods. An elongated UV lamp fitting within a tubular quartz window extends along the axis of the reaction chamber. An external circuit connects the electrodes and the water, such that a current flows in the water in the reaction chamber. A potential of up to 600 VDC may be applied between the solid electrodes and water in the chamber.

Abstract: A device for separating particles from a liquid to be treated is disclosed. The device has a cylindrical enclosure with an inlet for creating a swirling flow at its upper end and an annular channel formed by a flow diverter plate leading to a retention chamber at its base. The flow diverter generates an ascending swirling flow of treated liquid which is discharged through an axial outlet tube in the uppermost portion of the enclosure. The flow diverter includes at least one plane central section and means for adjusting its longitudinal position to adjust the annular channel. The axial outlet tube is extended downwardly by a flow adjusting element to create a flow of annular section.

Abstract: This invention pertains to a multi-stage separator vessel through which the to-be-cleaned fluid flows. Aeration assemblies within the inner cells disperse micro-fine gas bubbles into the fluid for cleaning purposes. Additionally, the inlet piping contains a separator that begins the separation process before this fluid is discharged into the first cell. An L-shaped passageway interconnects the various flotation cells of this separator with the entrance of each such passageway being at an elevation below its exit. A weir is located within each flotation cell that is adjustable as needed. This weir empties into a channel alongside the separator vessel that collects the separated contaminants flowing over the weir for later disposal.

Abstract: The invention pertains to the purification of commercial, industrial and institutional waste streams in order to bring them into dischargeable compliance with environmental standards. The invention provides a system for removing contaminants, such as fats, oils and grease (FOGs) and total petroleum hydrocarbons (TPHs), from waste effluents on an essentially continuous basis. During the treatment process, the FOGs and TPHs disposed within the textiles to be cleaned are treated with an alkaline, pH- or acid-sensitive detergent, causing their emulsification. The effluent waste stream is then treated by removing the solids and particulates. The alkaline emulsion is broken up by acidification of the wastewater, thereby releasing and dispersing the FOGs and TPHs. The FOGs and TPHs in the broken-up and dissolved emulsion are agglomerated by the introduction of an organic, cationic polymer.

Abstract: A first stage of a two stage apparatus for separating floating paint spray particulates from a collection tank that receives the waterfall backdrop from a commercial paint spray booth has a vertically pivotal weir hinged to a weir box that receives the resulting watery sludge as the floating solids and surface water skim over the weir. A float is connected with the weir by a dog-leg rod to control the flow over the weir at a preselected rate in response to the level of sludge in the weir box, thereby to minimize the proportion of water in the sludge. The sludge is pumped from the weir box into an inlet at the lower end of a consolidator tank. A compressed air diffuser emits streams of minute air bubbles below the inlet gently carries the floating particulates to the water surface where they accumulate and are gradually forced upward as a mass above the surface by underlying particulates continually entering the accumulator. Water from the uppermost particulates drains back into the accumulator.

Abstract: The present invention relates to an apparatus for treating and regenerating a spent caustic solution at ambient temperatures which includes means for oxidizing the spent caustic stream with an air/ozone gas mixture, followed by irradiating the oxidized spent caustic stream with a broad range of ultraviolet radiation and finally filtering the spent caustic solution.

Abstract: Apparatus for treating potable water to remove odorous sulfur compounds therefrom is disclosed. The apparatus comprises a treating tank, a fogging nozzle, means for directing water to be treated through the fogging nozzle and into the treating tank, means for injecting compressed air into the water directed through the fogging nozzle, a filter vessel, and a de-aerating vessel. The compressed air injected into the water that is directed through the fogging nozzle is at a pressure sufficiently high that minus 100 micron water droplets leave the fogging nozzle. Air, most of the sulfur compounds present in the water and some entrained water are ultimately discharged from the treating tank. The means for directing the water to be treated through the fogging nozzle is controlled to maintain a predetermined water level in the treating tank. The filter vessel contains a bed of a filter medium which forms a loose bond with the remaining H.sub.2 S in the filter vessel.

Abstract: A system and method for the purifying of water passing through the system, the system comprising in combination a plurality of containers; a quantity of particulate material formed of trace mineral granules located within the containers and adapted to remove contaminants from water contacting the granules as the water passes through the containers; a plurality of pipes for feeding water to the first container, and then sequentially to each subsequent container, and then from the last container; injectors operatively associated with the plurality of pipes in advance of the containers to inject ozone into the water prior to the feeding of water to the containers; and pump means to feed water through the pipes and containers in a continuous and automatic cycle of operation.

Abstract: A method in which a miscellaneous drain water purifying device having a plurality of separator tanks connected to miscellaneous drain water sources via a change valve, receiving miscellaneous drain water, leaving it stagnant, and separating sedimentation and floating substances and a decomposition tank connected to a plurality of the respective separator tanks and receiving flow-out liquid from the sedimentation separator tanks is used, while one of the sedimentation separator tanks receives miscellaneous drain water and carries out sedimentation separation of sludge, sends out the top level clear water in the quantity equal to the received water quantity to the decomposition tank and carries out purifying treatment, an aeration treatment of the sludge separated from miscellaneous drain water by the previous stage prior to transfer is carried out in the other separator tank which is shut off from the miscellaneous drain water sources via the change valve; such transfer is alternatively repeated at suitable in

Abstract: A bioreactor comprising a reactive vessel having an inlet system for material and a reaction chamber located above the inlet system. The inlet system has outflow openings that are at least partially tangentially oriented. A partition separates the reaction chamber from a chamber in which the inlet system is disposed, and the partition has at least one radial slit formed by two radial edge strips overlapping one another and vertically spaced apart. This slit interconnects the chamber in which the inlet system is disposed and the reaction chamber. The partition consists of at least two segments partially overlapping one another. The partition is substantially conical.

Abstract: Apparatus for filtering cellulose acetate solutions, including a backflush filter to effect filtration so as to avoid solvent losses and filtering aids that must be dumped, dilution means including solvent supply means for diluting the backflush liquid, separation means for eliminating solid insoluble components, and means for recycling backflush liquid freed from solids to a plant for producing new cellulose acetate spin solution.

Abstract: A wastewater treatment system and method for chemical precipitation and removal of metals from wastewater in a continuous or batch treatment process includes an ion-selective sulfide electrode and a reference electrode disposed in a precipitation tank for measuring an electrochemical potential therebetween in a predetermined range. A controller unit is provided which is responsive to the electrochemical potential in the predetermined range and is connected to a precipitant feed unit for automatically controlling the chemical precipitant fed into the precipitation tank.

Abstract: A method and apparatus for removal of solids from aqueous wash solutions such as, but not limited to, solutions used in hot jet-spray parts washers. Coarse solids are removed by a vortex separator during all operations. Solids accumulated in the parts washer storage tank are intermittently removed and fine solids are removed by intermittent depth filtration. In one embodiment of the invention, the method includes the purging of the vortex separator to the primary stage of depth filtration.

Abstract: An equipment for treating sewage, comprises a horizontal plate with a water sinking hole dividing the equipment into two portions: an upper portion of biofilter and a lower portion of contact oxidation pond. Within such equipment, a two-stage sewage biochemical treatment is accomplished. The equipment of the present invention has the advantages of less land occupation, less energy consumption, higher pollutant removing rate, higher shock resistance, easy management, no excess sewage and waste gas being drained off and less secondary pollution.

Abstract: A wastewater treatment plant comprising a pretreatment chamber, aeration chamber and a settling chamber designed to minimize or eliminate sludge buildup at the bottom of the aeration chamber. Two support walls are provided. The combined function of one support wall and an angular portion at the bottom of the common wall between the aeration and settling chamber is to regulate the flow pattern in the aeration chamber and return settled biodegradable matter from the bottom of the settling chamber to the aeration chamber for further treatment. The fluid flow created by the wall structure enhances the action of the settling chamber and elinates dead zones in the aeration chamber thus minimizing sludge buildup.

Abstract: The present invention provides a new and improved method for treating drinking water in a drinking water treatment plant that provides for substantial or complete removal of chlorine dioxide and an associated by-product from water when chlorine dioxide is used as an initial disinfectant and/or chemical oxidizing agent. More particularly, the present invention provides a means for decreasing undesirable residual amounts of chlorine dioxide and chlorite ion using ferrous chloride.

Abstract: A mobile multi reservoir unit aspirates liquid with solids from septic tanks, treats immediately the liquor by a flocculent polymer and dehydrates the product by a low speed vertical centrifugal machine; the liquid is returned to the septic tank and the solid is maintained in a mud stade, easy to rake off by a rotating folding knife, followed by transfer to a storage reservoir; a pump unit enacts the material transfer from and to each reservoir in succession by aspiration and by pressure build up.

Abstract: Use of polymeric two-phase systems for removing microbial contaminants from industrial lubricating agents, a method of purifying microbial contaminated lubricating agents by mixing the lubricating agent with a polymeric two-phase system, allowing the mixture to separate so as to form a top-phase containing the lubricating agent and a bottom-phase containing at least part of the microbial contaminants, and separating at least a major part of the microbially enriched bottom-phase from the top-phase, a plant for microbial purification of lubricating agents comprising a mixing tank (4) having means (7, 8) for feeding microbially contaminated lubricating agent (S) to the mixing tank, means (13) for feeding a polymeric two-phase system to the mixing tank, a stirrer (5) in the mixing tank, means (9, 10) for feeding the mixture to a separation device (6) for separating the mixture into a top-phase (T) containing lubricating agents, and a bottom-phase (B) containing microbial contaminants, and means (18) for recoverin

Abstract: A compact water treatment plant has at least one vertical stack of dissolved air flotation (DAF) type clarifiers. Raw water is directed first to a single stage clarifier with a shallow tank. Its output is fed to an underlying two stage clarifier, preferably one with tall, mutually isolated cells, inclined baffles over a filtration medium in each cell, a cell-by-cell backwash capability, and an arrangement for isolating the first filtrate from the clarified water. Preferably, there are two such stacks in side-by-side array to provide a peak-load capacity, redundancy, and extreme compactness. Also preferably, clarified water from the single stage clarifier flows to the two stage clarifier via a bioreactor and an associated DAF clarifier. A source of aeration defines an upper, aerobic zone in the reactor where bacteria act on organic contaminants (COD's and BOD's). Strips of a deep pile, woven textile form a biocarrier. The strips oscillate in the tank.

Abstract: An apparatus and method for clarifying a contaminated fluid comprising a separator vessel having therein a cyclonic flow chamber; a spiral preliminary separator introduces the contaminated fluid to be separated into the cyclonic flow chamber by a tangential inlet so as to establish a swirling body of fluid; the cyclonic flow chamber has concentric shells positioned below the tangential inlet for discharging separated solids to a collection area and separating an oil and water mixture into a fluid flow zone formed by the cyclonic flow chamber and the wall of the separator vessel wherein water and oil are separated by aeration provided by eductors; a vertical outlet port discharges separated oil and gas from the upper portion of the cyclonic flow chamber to a fluid flow zone wherein oil and gas are separated. The separated water, oil, gas and solids are removed through discharge ports.

Abstract: Apparatus for separating solids and liquids has an initial separator for removing coarse solid material from a mixture of solids and liquids, a first screen for separating further solid material from the liquid and a first auger extending axially through the first cylindrical screen for removing the separated further solid material from the first cylindrical screen. A second screen receives the liquid from the first screen and separates fine particles from the liquid, and a compactor between the first and second screens compacts the solid material removed from the first screen by the first auger. A second auger is provided in the second screen for mixing and removing the compacted solid material and the separated fine particles.

Abstract: The invention relates to a method for processing manure, liquid manure and/or Kjeldahl-N containing waste water being subjected to a nitrification in an aerated reactor containing active sludge and to a denitrification in a high rate recirculation denitrification reactor (13) containing a very compact biomass capable of converting nitrate to nitrogen gas. The loading of the nitrification reactor (9) being controlled to obtain an optimal nitrification and denitrification, the effluent from the nitrification reactor (9) partially being passed to the denitrification reactor (13), adding a source of carbon to the effluent to be passed to the recirculation denitrification reactor (13) and passing another portion of the effluent stream from the nitrification reactor (9) to a separation step (19) to separate a sludge, the effluent from separation step (19) being passed to a discharge line denitrification reactor (37) under the addition of a carbon source if desired.

Abstract: A modular gray water processing system is provided comprising a filter, an ultraviolet radiation chamber coupled to the filter and a storage tank for receiving and storing irradiated gray water from the ultraviolet radiation chamber. The filter filters gray water being provided to the gray water processing system and provides the filtered gray water to the ultraviolet radiation chamber. The ultraviolet radiation chamber comprises a plurality of ultraviolet radiation generating modules and a fluid controlling system for directing the gray water entering the ultraviolet radiation chamber to a number of the ultraviolet radiation modules in accordance with the flow rate of the filtered gray water. The irradiated gray water exiting the radiation chamber is directed to the storage tank where it is stored awaiting reuse.

Abstract: A biological filtration system is provided for filtering a water supply. The filtration system includes a micron filter having an input and an output. Water is supplied from the water supply to the input of the micron filter. The filtration system also includes a canister filled with a biomedia material. The canister has an inlet end coupled to the output of the micron filter and an outlet end. Air is injected into the inlet end of the canister. Water from the outlet end of the canister is returned to the water supply.

Abstract: A filtering system with electrolytic action and method is disclosed which is adapted for filtering the water in swimming pools, spas, saunas, hot tubs, whirlpools and the like. The filtering system includes a pump for drawing water from a body of water and circulating this water through an electrolytic filter including a layer of electrolytic filter media of dissimilar metal particles or granules and returning this filtered water to the body of water. The filtering system not only removes sand and sediment but also prevents algae and fungus growth, kills bacteria, and eliminates the need for adding chlorine, bromine, and algacide to the water. In accordance with a preferred embodiment, the filtering system includes a bypass valve installed downstream of the pump to divert only a selected quantity of water through the electrolytic filter.

Abstract: A filter system (10) is disclosed that includes a filter assembly (12) and input/output hardware (14). The filter assembly includes a housing (16) and cap (18) that cooperatively support a prefilter (20) and main filter (22) in a fluid flow path. Fluid flow through the filter assembly occurs radially through the prefilter and axially or radially through the main filter. The main filter includes an alkaline leaching agent to raise the pH of fluid flowing therethrough to, for example, between 8 and 10. A method is also disclosed for evaluating the effectiveness of the filter system in reducing a select contaminant from the fluid by evaluating the effectiveness of the filter system in raising the fluid's pH.

Abstract: Sewage treatment is carried out at high performance from a treatment at high load to a treatment at low load at all times, irrespective of seasonal change and region where sewage treatment equipment is installed, and no excess sludge is discharged outside the equipment at all. Whirl water flow generating means and a heating pipe are disposed in sewage treatment tanks in which a number of activated sludge process beds and aeration pipes are disposed. A sewage water under treatment is returned from a third sewage treatment tank, to first and second treatment tanks, for example. A sedimentation tank and a sludge digestion tank are also disposed so as to supply the supernatant obtained after the sludge treatment to the first sewage treatment.

Abstract: This invention pertains to a multi-st vessel through which the to-be-cleaned fluid flows. Aeration assemblies within the inner cells disperse micro-fine gas bubbles into the fluid for cleaning purposes. Additionally, the inlet piping contains a separator that begins the separation process before this fluid is discharged into the first cell. An L-shaped passageway interconnects the various flotation cells of this separator with the entrance of each such passageway being at an elevation below its exit. A weir is located within each flotation cell that is adjustable as needed. This weir empties into a channel alongside the seprator vessel that collects the separated contaminants flowing over the weir for later disposal.

Abstract: An oxidation ditch wastewater treatment and denitrification system is provided, comprising an oxidation ditch, including a central channel, having an inlet end, an outlet end, a bottom and two sidewalls; an aeration channel, having an inlet end fluidly connected to the outlet end of the central channel, an outlet end fluidly connected to the inlet end of the central channel, a bottom and two sidewalls; and a denitrification channel, having an inlet end fluidly connected to the outlet end of the central channel, an outlet end fluidly connected to the inlet end of the central channel, a bottom and two sidewalls; an aerator, positioned in the aeration channel; and at least one circulation device, positioned in the oxidation ditch and adapted to circulate wastewater from the inlet end of the central channel to the outlet end of the central channel, from the inlet end of the aeration channel to the outlet end of the aeration channel, and from the inlet end of the denitrification channel to the outlet end of the de

Abstract: Oxygen is separated from air by pressure swing adsorption in plant 2. The oxygen is passed through an ozone generator 4. The resulting ozonated oxygen is passed upwardly through a contactor 6 countercurrently to the flow of a side stream of water to be treated with ozone. The side stream containing dissolved ozone flows from the contactor 6 to a mixer 8 in which it is mixed with a main stream of water. The effluent gas from the contactor 6 contains air displaced from the water and undissolved oxygen. It is divided into two parts. One part flows to the pressure swing adsorption plant 2 and is separated therein with the air. The other part is dried by temperature swing adsorption in drier 20 and the resulting dried gas is ozonated in the ozone generator 4 with the oxygen from the plant 2.

Abstract: An installation for the filtration and cleansing of liquids, notably water, of the type having a loop for the circulation of the water to be treated, including at least one tangential filtration membrane, comprising a new tangential membrane filtration installation, with ozone injection, enabling the surface, internal and chemical clogging of the membrane to be restricted. The installation includes means for the addition of an oxidizing gas to the liquid to be treated, in the loop upstream of the membrane, so as to form microbubbles of said gas with a size such that they create turbulence in the liquid at the membrane and this turbulence, combined with the phenomenon of oxidation, restricts the clogging of said membrane and leads to an improvement in the flow rate and in the physical/chemical qualities of the filtrate. If necessary, it includes means for the injecting of chemical reagents and/or absorbents into the filtration loop.

Abstract: A wastewater treatment system for domestic sewage uses a primary treatment vessel and a secondary vessel with a filtration unit therebetween. Continuous backwashing of the filtration unit occurs when a well pump is activated to empty the secondary vessel. A controlled portion of fluid discharged by the well pump backwashes the filter continuously as the secondary treatment vessel is emptied.

Abstract: The local reclamation system includes an accumulation tank for a soiled solution. A tank outlet valve selectively allows a flow of the solid soiled solution into the remainder of the system. A blend conduit leads from the outlet valve. An oxidizing supply selectively provides an oxidizing agent to said soiled solution downstream of the outlet valve in the blend conduit. A blend pump receives the soiled solution with oxidizing agent to promote the flow of the soiled solution through the system and a more uniformed disposal of the oxidizing agent throughout the solution. A six stage filter section selectively removes particulate matter. A biologic stage promotes a sterile reclaimed solution and a solution accumulator accumulates and stores the solution. Repeated injections of oxidizing agents occur before filter stage sections and pumps. The reclaimed solution can be reused or discharged without penalty.

Abstract: The water reclamation system receives waste water from a small residential type source, such as one or more homes, a series of apartments or road houses, and processes the water so that it meets the standards of state and federal regulatory agencies for non-domestic services. The treatment in accordance with the system starts with biologic and enzymatic treatment of the materials in the waste water stream. Next, bacteria is killed by chlorination. Thereafter, mechanical filtration improves clarity. Finally, ultraviolet treatment kills any remaining bacteria. The final flow is useful for irrigation, washing of structures and automobiles, filling swimming pools, and for returning to toilet tanks for flushing purposes. The system includes a provision for backwashing the filters.