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| Number | Title | Issue Date |
| 5336401 | Water filtration and aeration system for aquariums A water filtration and aeration system fastened to an aquarium to let gas (CO2, O2) be admitted in minute bubbles into water and then to let treated water be guided back to the aquarium. The system includes a gas diffusing unit, a flow guide as... | 08/09/1994 |
| 5328601 | Apparatus for in place gas cleaning of diffusion elements Cleaning of multi-pore diffusion elements in place with cleaning gases while submerged in liquid media by applying said elements in improved gas cleaning apparatus. Such apparatus may for example include diffusion element retaining rings or other retainin... | 07/12/1994 |
| 5326459 | Wastewater treatment apparatus Disclosed herein is a wastewater treatment facility comprising a structure defining first and second tank portions; a shaft rotatably supported by the structure; a first biological reactor in the first tank portion and including a first rotatable biologic... | 07/05/1994 |
| 5326469 | Method and apparatus for separating oil and water Oil and water separation apparatus comprising a reaction chamber having an inlet through which a mixture of oil and water may be introduced. A reaction that extends upwardly from an intake opening therein located in the reaction chamber and out of the cha... | 07/05/1994 |
| 5322622 | Filtering device for an aquarium tank An improved filtering device for an aquarium tank, particularly a filtering device in which a plurality of "U" notches are formed at equal distance in the rim of the cup, the arc section formed by two notches has a lateral rib and the circular connecting ... | 06/21/1994 |
| 5318701 | Tandem pump/filter for aquarium A tandem pump equipped with a pair of pump units that are assembled together each having a water inlet and a water outlet. Each water outlet duct is associated with a control chamber which is equipped with a volume control disc which can be operated with ... | 06/07/1994 |
| 5316671 | Submersible aeration train and aeration apparatus for biological purification of sewage Disclosed is an aeration system for use in a liquid filled basin such as a wastewater treatment process and is particularly effective in a fill and draw system which requires a cyclic operation and includes air diffusion, liquid separation and decanting. ... | 05/31/1994 |
| 5314076 | Installation for the mixing of two fluid phases by mechanical stirring, notably for the treatment of water by transfer of oxidizing gas, and use of such an installation The disclosure relates to a preferred application for the treatment of stored, waste or filtered water by the transfer of an oxidizing gas into this water. In this case, it has the functions of a turbojet with mass transfer. The installation is constitute... | 05/24/1994 |
| 5310481 | Apparatus for continuously separating a mixture of fluids having different densities In a separator for separating a mixture of fluids of different densities into a high density fraction and a low density fraction, the mixture is introduced into a tank which is divided into a plurality of separation chambers and a collection chamber. As t... | 05/10/1994 |
| 5308480 | Apparatus for removal of solid, chemical and bacterial waste from water The present invention relates to a two-stage, multi-phase apparatus for the rapid and economical purification of waste water which may contain solid wastes, and which does contain chemical and bacterial wastes. The waste water is first intimately intermix... | 05/03/1994 |
| 5304301 | Apparatus for the injection of compressed air into a liquid Apparatus for injection of compressed air into a liquid such as waste water comprises a tubular basic body surrounded by a flexible, perforated membrane through which compressed air is supplied through radial openings in the basic body to be dispersed by ... | 04/19/1994 |
| 5302286 | Method and apparatus for in situ groundwater remediation A system for in-situ bioremediation includes a well extending into a saturated zone. The well includes a casing having two permeable sections in the saturated zone. Groundwater may be recirculated through the well and the saturated zone between the two pe... | 04/12/1994 |
| 5300232 | Apparatus and process for treatment of liquids A method and process for the treatment of liquids, including moving injection wands into a tank containing the liquid to be treated and injecting a treating solution through the injection wands to increase the reaction mixing between the injected treating... | 04/05/1994 |
| 5288400 | Biological filtration system 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 in... | 02/22/1994 |
| 5273664 | Apparatus and method for disinfection of water by ozone injection Apparatus and a method for disinfecting water by contacting the water with gaseous ozone. The device includes a series of treatment chambers that are interconnected serially by external transfer conduits, each transfer conduit including an introduction ta... | 12/28/1993 |
| 5271832 | Activation plant with funnel-shaped secondary sedimentation An activation plant for the treatment of waste water by the activated sludge method is disclosed wherein the plant has an outer, annular activation tank, a concentric, inner, funnel shaped secondary sedimentation tank, and a rotating aeration bridge rotat... | 12/21/1993 |
| 5262051 | Apparatus for biological treatment of water and waste, of the attached-growth type An apparatus for biological treatment of water and waste of the attached-growth type, constructed by disposing long fiber bundles formed by binding a large number of monofilaments, upward and downward in a zigzag formation in a vessel, fixing substantiall... | 11/16/1993 |
| 5254253 | Modular shipboard membrane bioreactor system for combined wastewater streams Raw sewage ("black water" from toilets), wastewater from showers, sinks, kitchen facilities ("grey water") and oily water from the bilge of a host vessel ("oily water"), in combination, unexpectedly provide the essential nutrients for a live mass of mixed... | 10/19/1993 |
| 5244570 | Apparatus for treating wastewater A process and apparatus is provided for removing color from a wastewater stream. The process includes directing the wastewater stream through at least one UV reactor and simultaneously injecting a hydrogen peroxide charge into the wastewater stream exactl... | 09/14/1993 |
| 5234632 | Aeration apparatus for liquid An apparatus for injecting compressed air into a liquid comprises a tubular basic body such as a pipe that is surrounded by a perforated membrane through which air is distributed into wastewater and is connected to the nipple of a compressed air supply th... | 08/10/1993 |
| 5232584 | Method and apparatus for purifying and compacting solid wastes The present invention relates to a multi-stage, single reactor, purification system for disinfecting, washing, and concentrating solid wastes, which include contaminated soil, highly concentrated biosolids, spent animal bedding, and spent diapers, etc. A ... | 08/03/1993 |
| 5223130 | Device for organic neutralization and removal of phosphorus compounds present in water basins The device comprises a back module 2, consisting of a housing 4 provided with an opening 10 and with a window 11, and of a front element 3, consisting of a container 20 having a tub shape and turned upside-down, designed to be partially inserted into the ... | 06/29/1993 |
| 5221470 | Apparatus for treating waste water A waste water treatment plant is disclosed that uses aerobic bacteria to digest solid particles in the waste water. The plant includes a filter located just upstream of the outlet through which the water leaves the plant. The filter comprises an elongated... | 06/22/1993 |
| 5217621 | Carbonization of liquid A method and apparatus for carbonating a liquid by creating a pressurized atmosphere of carbon dioxide in a container, spraying a liquid, including a caustic containing liquid, into the atmosphere to cause an interaction between the liquid and the carbon ... | 06/08/1993 |
| 5217609 | Combination sludge collector, aerator, and return pump The clarifier in any activated sludge sewage treatment plant must provide (a) a quiescent environment to allow gravity settling of the bio-mass (sludge) grown within the aeration tank, (b) the decanting of clear supernatant thus produced, and (c) the time... | 06/08/1993 |
| 5217617 | Multi-cell transportable bioslurry reactor A transportable apparatus for biological treatment of a slurry of contaminated materials, including a series of square reactor cells having substantially parabolic lower portions, set at the same elevation and communicating in series. Gas diffusers are pl... | 06/08/1993 |
| 5211856 | Method of oil/water separation and device for purification of oil This invention provides a new low vacuum oil/water mixture liquid separation method and an improved oil purification device for oil/water separation. Fully diffused purified gas is introduced into an oil/water mixture liquid in a low vacuum container, ena... | 05/18/1993 |
| 5209843 | Process and apparatus for waste water treatment The present invention relates to method and apparatus for treating waste water, particularly metal-containing waste water. The process includes separating and removing metals and other impurities from the waste water by the sequential addition of a base, ... | 05/11/1993 |
| 5200081 | Secondary sewage treatment system A secondary sewage treatment system is provided with vertically-aligned foam collecting, turbulent, mixing, settling, and sludge collecting zones. A grating defines the boundary between the turbulent and mixing zones. Beneath the grating, a bouyant media,... | 04/06/1993 |
| 5190648 | Water purifying method and apparatus A method and apparatus for purifying a reservoir of water is disclosed employing an elongated lift tube suspended in a water tank for conveying water from and into the reservoir and introducing an air stream containing ozone in the bottom of the lift tube... | 03/02/1993 |
| 5169567 | Water aeration apparatus A reservoir is arranged to include a water inlet conduit and a water outlet conduit. The reservoir includes an aeration manifold effecting aeration of water contained within the reservoir, wherein the aeration manifold cooperates with a water dispersion m... | 12/08/1992 |
| 5156778 | Mixing device A device for use in the mixing of fluids, e.g. the gasification of liquids, comprises an elongate member including an internal passage; and, mounted on the elongate member via radials arms, one or more venturi members each having a convergent-divergent du... | 10/20/1992 |
| 5151197 | Fluid treatment Apparatus (1) for treating fluid, in this case wastewater, comprising a treatment vessel or tank (2), means (3) to supply wastewater to be treated in a pulsed sequence to the vessel, and means (4) to supply treatment fluid, in this case comprising oxygen ... | 09/29/1992 |
| 5143625 | Method and apparatus for clarifying liquid using a pulsating sludge bed and part of concentrated sludge There is disclosed a pulsating sludge bed clarifier especially for the treatment of low turbidity waters, which uses incline plates in the sludge bed and some recirculated sludge. The clarification is greatly enhanced by recirculating a relatively small p... | 09/01/1992 |
| 5131321 | Vessel for treating a finely-divided material with a fluid A vessel for treating a finely-divided material, such as granules, powder, flakes and the like with a fluid, comprising an essentially closed wall having product feed and discharge means for feeding finely-divided material to and discharging it from the v... | 07/21/1992 |
| 5120435 | Pre-treatment sewer discharge system A system for purifying water is provided having a series of filtering systems connected in series in a predetermined order along a flow path of the water to be purified. The filtering systems used in the invention include air striping, aeration, gravity s... | 06/09/1992 |
| 5114586 | Sanitation system A sanitation system for treating a black water stream and a grey water stream. The black water stream is inputted into a black water digester wherein the black water stream is aerobically digested to produce a treated black water stream and the treated bl... | 05/19/1992 |
| 5110459 | Septage anaerobic treatment batch processing A sequencing batch waste treatment facility with pretreatment mixing, blending and dilution, with post-treatment liquid effluent recirculation and with anaerobic sludge digestion wherein high biological oxygen demand (BOD) waste is treated and reduced to ... | 05/05/1992 |
| 5106495 | Portable water purification device A portable ozonization system having a tank mounted on a base housing a battery, pump and associated components. A photovoltaic battery charger is mounted on a surface of the tank. Water from the tank is periodically circulated from under the control of a... | 04/21/1992 |
| 5106496 | Treatment of volatile organic substances at waste water treatment plants A method and apparatus for purifying industrial waste fluids by an aerobic biological treatment is provided herein, which is capable of concurrently purifying waste gases emanating from such waste liquids. The improvement relates to the elimination or red... | 04/21/1992 |
