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| Number | Title | Issue Date |
| 5544072 | Method for regeneration of a water softener A demand initiated method for regenerating a water softener which operates the softener ion exchange bed over a capacity range in which the resin is most efficiently restored by exposure to brine. The reserve capacity of the softener is adjusted in respon... | 08/06/1996 |
| 5540836 | Wastewater treatment system and method A wastewater treatment system and method for substantially reducing or eliminating total suspended solids (TSS), biological organic discharge or biochemical oxygen demand (BOD), and fats, oils and greases (FOG) contaminants. The system includes at least o... | 07/30/1996 |
| 5540845 | Method of and apparatus for monitoring aqueous streams A metallic indicator electrode senses the anionic charge per unit time borne by the dispersed phase of a stream of an aqueous dispersion of negatively charged particles by virtue of the potential developed by the electrode as measured by a voltmeter. The ... | 07/30/1996 |
| 5538644 | Apparatus and method for maintaining a stable bath for an autodeposition composition by periodically separating particular metal ions from the composition An apparatus and method is provided for automated periodic removal of metal ions and contaminants from a chemical bath comprising a latex solution containing charged latex particles and having an acidic pH, used for forming a coating by autodeposition. Th... | 07/23/1996 |
| 5536417 | Methods and systems for prewashing automatic backwashing filters New methods are disclosed for improving the cleansing the plurality of seriate filter beds in automatic backwash filtering systems, equipped with a traveling backwash shoe, in which the beds are backwashed one at a time with backwash liquid from an efflue... | 07/16/1996 |
| 5534139 | Apparatus for controlling solids-liquid separation A process and apparatus for controlling and/or regulating a solids-liquid separation process, such as in a dewatering or drying device includes at least two photodetectors, each associated with a light source, a detector to detect light of the associated ... | 07/09/1996 |
| 5531960 | Automated dissolved oxygen and biochemical oxygen demand analyzer An automated method and apparatus for determining the dissolved oxygen (DO) content and the biochemical oxygen demand (BOD) of multiple test samples includes a sample set containing several test sample containers, a robotic arm capable of motion toward th... | 07/02/1996 |
| 5531905 | System and method to control laundry waste water treatment A system and method are disclosed for controlling the amount of cationic coagulant to be introduced into a laundry waste water having a content of non-solid fats, oils and/or grease (FOG) which is to be reduced. This system comprises a detector, located u... | 07/02/1996 |
| 5529751 | Aquarium pH adjustment apparatus An apparatus is provided for adjusting the pH of water in an aquarium. A measured sample of the aquarium's water is combined with a chemical indicator. The pH of the aquarium is then determined. If the pH is too low, drops of basic fluid having a known pH... | 06/25/1996 |
| 5527450 | Water conductivity monitor for a water purification system An improved water quality monitor is provided for use in a water purification system of the type having a reverse osmosis unit for producing relatively pure water from a tap water supply. The reverse osmosis unit supplies produced purified water to a rese... | 06/18/1996 |
| 5527470 | Water quality monitoring and control system for an ice maker A method for monitoring and controlling water quality in a water phase changing device, such as an ice maker, having a water inlet, a water outlet, a reservoir configured for retaining a supply of water and being in fluid communication with the inlet and ... | 06/18/1996 |
| 5518608 | Water purity determining device and system for producing ultrapure water using such devices A TOC monitor for determining the quality of ultrapure water is described. The TOC monitor includes a ultraviolet oxidizer in the form of spiral tubing, having an inlet connected to a first resistivity meter and an outlet to a second resistivity meter. Th... | 05/21/1996 |
| 5516423 | Variable residence time treatment system A variable residence time treatment system for liquid has a reactor vessel with variable effective holding volume. Liquid is admitted with at least one treatment material to adjust a property of the liquid, such as its pH, a discharge outlet is open full ... | 05/14/1996 |
| 5514264 | Pressurized solution feed system for pH control A method and appartus for controlling the pH of a water stream using carbon dioxide in which carbon dioxide at a selected pressing and flow rate is mixed with a carrier water, also at a selected pressure and flow rate, and the carbon dioxide-carrier water... | 05/07/1996 |
| 5512178 | Water treatment method and apparatus therefor In a water treatment method and an apparatus therefor, a high purification step comprising a precision filter and an ion-exchange resin is added to a treatment system having ozone supply units, filtering units and an ultraviolet-ray irradiating unit. Trea... | 04/30/1996 |
| 5511263 | Laundering liquids process and decontamination facility Decontamination laundering facilities and methods are disclosed including a washer area, a filtering area automatically monitoring and controlling cleaning fluid quality discharged to the environment, a clean area, and apparatus and methods for automatica... | 04/30/1996 |
| 5505843 | System for controlling water treatment based on plankton monitoring In a water supply plant which cleans water taken in from such sources of intake water as lakes and marshes, dams, rivers and so on and delivers the water as city water, obstructions to water treatment is predicted and methods for preventing the obstructio... | 04/09/1996 |
| 5498347 | Reactor for the ozonization of water Reactor for the optimized ozonization of water intended for human consumption, in which the direct oxidizing action of the ozone is supplemented by the radical oxidizing action of the ozone, the latter being intensified by the introduction of hydrogen per... | 03/12/1996 |
| 5498328 | Apparatus for selectively sampling filter backwash fluid This invention relates to monitoring apparatus and, in particular, but not exclusively to such apparatus for use in association with mains water supply facilities. A water works 10 has a water main 12, in which is located a filtration unit 13 having a fil... | 03/12/1996 |
| 5498346 | Hydrocyclones for oil spill cleanup having a controlled split ratio An oil spill recovery system includes a first hydrocyclone separator and optionally a second hydrocyclone separator located on a floating vessel floating on a body of water from which spilled oil is to be recovered. A recovered fluid containing oil and wa... | 03/12/1996 |
| 5494585 | Water remediation and purification system and method The water remediation and purification method includes a cavitation nozzle which is operated with a throat size and pressure drop to incur cavitation in the water. The explosive and implosive bubble growth and collapse produces free radicals which interac... | 02/27/1996 |
| 5492632 | Method and system for monitoring and controlling a filtration process A method and apparatus for creating a filtration knowledge base is used in a filtration process for separating a liquid component and a solid component from a slurry. The concentrations of the solid component in the slurry, and of the solid component in t... | 02/20/1996 |
| 5492620 | Apparatus for removing contaminants from a waste stream This invention includes a first balance pH tank, a clarifier tank and a final pH balance tank. The first tank periodically receives a certain volume of the waste stream. This tank is equipped with an automatic system for raising the pH so that all the hea... | 02/20/1996 |
| 5484521 | Rotary drum fluid/liquid separator with energy recovery means A rotating drum divided in axial spaced compartments with one of the compartments includes paddles and coalescing material to separate the fluid from the liquid and the other compartment includes stationary oil pumping and water pumping means and an energ... | 01/16/1996 |
| 5480562 | Method of purifying water controlled by laser scanning A system and method is disclosed for purifying water for drinking or bathing purposes employing an optical scanning device for detecting organisms in the water such as bacteria, algae, or viruses. The optical scanning device may be a video camera or may c... | 01/02/1996 |
| 5480537 | Apparatus for waste water treatment using calcium carbonate mineral and microorganisms in combination An apparatus for waste water treatment, wherein fluorine contained in waste water is treated into a fluoride through a chemical reaction and sludge containing the fluoride is thickened and dehydrated into a sludge cake, has first and second tanks each pac... | 01/02/1996 |
| 5480555 | Control system for a water softener, control device therefor and methods of making the same A control system for a water softener, control device therefor and methods of making the same are provided, the system comprising a microcontroller operatively interconnected to an output of a comparator to effect a subsequent operation of a recycling uni... | 01/02/1996 |
| 5478529 | Activity control apparatus for zinc phosphate treatment solution A treatment solution which is stored in a treatment vessel is supplied to a mixing vessel and a simple fluoride solution is supplied into the mixing vessel from a simple fluoride supply vessel to convert aluminum salt of complex hydrofluoric acid which is... | 12/26/1995 |
| 5478479 | Two-stage cell wash process controlled by optical sensor A method of washing salvaged blood includes separating higher density blood components from lower density blood components within a rotating centrifuge bowl. The separated blood components are washed with wash solution to remove free hemoglobin (Hgb), ant... | 12/26/1995 |
| 5478464 | Apparatus for the biodegradation of organic contaminants in a mass of particulate solids A method for the biodegradation of organic contaminants in a mass of particulate solids. The method comprises providing a contaminated mass of particulate solids on an impervious surface in fluid communication with an impervious recovery reservoir. The im... | 12/26/1995 |
| 5476583 | Mixed liquor wasting system In an extended aeration wastewater treatment system having wastewater flowing into a retention basin so as to form mixed liquor within the retention basin, the treated mixed liquor flowing out of retention basin through a retention basin exit line to an e... | 12/19/1995 |
| 5470484 | Method and apparatus for controlling the feed of water treatment chemicals using a voltammetric sensor A method for controlling the chemical treatment of a solution comprises the steps of feeding a treatment chemical into the solution, applying an external voltage across a reference electrode and a working electrode of a voltammetric sensor while the elect... | 11/28/1995 |
| 5466367 | Industrial waste water treatment A waste water treatment system is illustrated which can be configured to be portable and which minimizes the addition of solids to be disposed of through the use of ozone for contaminant reduction to basic elements after the pH value of the waste water to... | 11/14/1995 |
| 5450358 | Method and system for monitoring the quality of a water purification apparatus A water quality monitoring system (30) assessing the performance of a water purification apparatus (10) which compares the current percentage differential ion concentration or rejection ratio (Rx), between the upstream inlet (12) and downstream... | 09/12/1995 |
| 5447629 | Apparatus for purifying a liquid effluent containing pollutants The invention relates to an apparatus for the purification of a liquid effluent containing pollutants, particularly metals and/or radionuclides, as well as to a process for purifying the effluent. An object of the invention is to provide a continuously functio... | 09/05/1995 |
| 5441642 | Method and apparatus for controlled biological treatment of waste water A method and apparatus (1) for the control of biological treatment of waste water in which waste water is fed to a substantially air tight supported growth biological filter unit (2) that includes an exhaust gas vent (5). Dissolved oxygen is supplied to t... | 08/15/1995 |
| 5439592 | Method for removal of water soluble organics from oil process water A method for removal of water soluble organics from acidified oil process water is disclosed. The method comprises a step in which free oil is removed from such water by water-wet ultrafiltration to produce a water-rich filtrate stream which is then direc... | 08/08/1995 |
| 5427693 | Modular ozone water treatment apparatus and associated method 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 ch... | 06/27/1995 |
| 5421812 | Method and apparatus for controlling concentrations in tubing system A method and apparatus for determining, controlling or establishing the level of a constituent such as anticoagulant in a body fluid such as blood in a procedure for processing the fluid. The anticoagulant flow rate from an anticoagulant reservoir, the bl... | 06/06/1995 |
| 5422013 | Device and method of producing pure water A flow passage into which water-to-be-treated flows is provided with, in order from an upstream side, a deaerator as a DO eliminating device having a power variable mechanism, an oxidation device for oxidizing TOC by irradiating ultraviolet-ray, an ion el... | 06/06/1995 |
