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| Number | Title | Issue Date |
| 5800705 | Heat exchanger for aeration tank The invention relates to a tube bank heat exchanger for use in reducing the temperature of air delivered under pressure to an air diffuser system within a wastewater treatment facility. The tube bank heat exchanger, submerged within the wastewater, is of ... | 09/01/1998 |
| 5788847 | Diffuser construction and mounting arrangement An improved air diffuser and mounting arrangement for mounting diffusers on submerged air laterals in a wastewater treatment system. The diffuser is formed form a cylindrical pipe which is flattened on most of its length but left partially cylindrical for... | 08/04/1998 |
| 5785854 | Current and aeration system for wastewater plant A defined current and aeration system for the aeration chamber of an aerobic wastewater treatment plant is disclosed. It includes the release of oxygenation gas or air into the aeration chamber through a diffuser or the like at a position such that the ai... | 07/28/1998 |
| 5783073 | Process and apparatus for liquid sludge stabilization A process and apparatus for treatment of sludge is provided. The process includes providing sludge in a substantially liquid form and an alkaline additive to a preferably substantially closed reactor vessel, mixing the sludge and additive to ensure said p... | 07/21/1998 |
| 5779890 | Multi-eductor system Improved gas distribution and mixing is achieved in a gas/liquid mixing basin particularly for aerobic or anaerobic sewage digesters. In addition to a draft tube positioned generally centrally in the aeration or anaerobic basin and served by one or more g... | 07/14/1998 |
| 5770062 | Device for aiding the solubilization of gases in liquids An apparatus is disclosed for rapidly and efficiently dissolving gases in a liquid. A diffuser, having a closed top and an opened bottom, preferably in the form of a conical-shaped frustum having a plurality of openings around the perimeter near the close... | 06/23/1998 |
| 5770056 | Sewage dewatering equipment A process of dewatering primary-treated sewage which includes mixing the sewage with a coagulant or flocculant aid, usually activated polymer. The sewage is then mixed and flocculated at conditions which involve extensive mixing turbulence of the sewage a... | 06/23/1998 |
| 5766321 | Apparatus for reducing dissolved oxygen Disclosed is a dissolved oxygen reducing apparatus which enables supplying a liquid containing very small amounts of dissolved oxygen. The dissolved oxygen reducing apparatus includes a bubbling vessel (24) having a liquid charge inlet (21), a liquid disc... | 06/16/1998 |
| 5766457 | Water aeration system A water aeration system for receiving gas and/or iron laden water from a water source and delivering purified water to a service line. The system includes a tank with an internal volume fillable with water, a tank inlet, a tank outlet, and an aerator. Wat... | 06/16/1998 |
| 5762781 | Flotation apparatus and process A flotation apparatus including: an elongate vertical riser (142) in which a cocurrent flow of gas/slurry liquid mixture rises upwards to a discharge mouth at its top end; an aeration unit (140) provided at a lower end of the riser; a separation unit (150... | 06/09/1998 |
| 5755976 | Pneumatic bubble aeration reactor and method of using same A pneumatic bubble aeration reactor and method for conditioning bodies of liquid comprising at least one upwelling bubble conduit, at least one return conduit fluidly connected to the upwelling conduit via a fluid reservoir and a secondary gas-diffuser po... | 05/26/1998 |
| 5741417 | System for biologically treating wastewater A system for treating wastewater using the activated sludge biological process by retaining and degrading biodegradable coarse solids. A receiving well contains both a pre-separator stage and an activation chamber arranged one after the other in a directi... | 04/21/1998 |
| 5733447 | Bubble humidifier including permanent magnets for reducing the growth of algae therein A container for water. The container has walls and a base and a magnet located adjacent the base of the container. The magnet is positioned to be below the level of water in the container when water is present in the container. The invention find particul... | 03/31/1998 |
| 5716519 | Apparatus for discharging fluid additives into a water treatment vessel Apparatus for discharging an additive into water in a treatment vessel comprises discharging means and means for feeding the additive to the discharging means. The discharging means may comprise a pipe, a nozzle, or a header conduit having a number of out... | 02/10/1998 |
| 5714062 | Diffuser conduit joint In grid-type aeration systems with diffusers mounted and spaced longitudinally along air distribution conduits that are submerged in wastewater and secured to and above the floors of aeration tanks, such conduits are provided with couplings having first a... | 02/03/1998 |
| 5705063 | Ventilating disk assembly The present invention relates to an improved ventilating disk assembly. When the air pressure applied thereof is changed, different stirring effect can be attained and the debris or soil accumulated onto the ventilating disk can be readily removed. The im... | 01/06/1998 |
| 5698092 | In-situ oxidizing zone remediation system for contaminated groundwater A system is provided for producing an oxidizing zone within a saturated zone of an aquifer for in-situ decontamination of groundwater carrying contaminants in a plume wholly located below a water table in said saturated zone of said aquifer. The system co... | 12/16/1997 |
| 5695651 | Inlet screen The invention relates to the treatment of liquid waste such as sewage. The invention provides a method of screening of liquid waste to remove solid material therefrom, comprising passing the liquid waste in a downward stream through a suspended sack filte... | 12/09/1997 |
| 5693224 | Apparatus for eliminating hydrogen sulfide from liquids Sweetening of hydrogen-sulfide polluted liquids such as water and those whose viscosity is not substantially greater, is accomplished in upright tanks of constant cross-section, which are substantially conventional except for man-way provisions which perm... | 12/02/1997 |
| 5690820 | Wellhead brine treatment This invention relates to methods, systems and apparatus for producing primary treated brine, i.e. | 11/25/1997 |
| 5688400 | Waste water treatment plant A modular sewage treatment plant is disclosed using a vessel adapted to contain the standard three phases of a sewage treatment, aeration, settling and clarification. The vessel of this invention uses an inverted, centrally located funnel section to recei... | 11/18/1997 |
| 5685993 | Apparatus and method for ferrite formation and removal of heavy metal ions by ferrite co-precipitation from aqueous solutions Embodiments of an apparatus and method for ferrite formation and the removal of heavy metal ions by ferrite co-precipitation from an aqueous solution at ambient temperature have been developed. Magnetically susceptible ferrite crystals can be continuously... | 11/11/1997 |
| 5681509 | Apparatus and method for mixing and introducing gas into a large body of liquid Improved apparatus and method for mixing and introducing gas into a large body of liquid. The apparatus supports and rotates a plurality of spoke-like discharge members below the surface of the liquid. The members have upwardly facing perforated discharge... | 10/28/1997 |
| 5676823 | Sparger system including jet stream aerator A sparging system assembly having an improved nozzle for use in a flotation separation column. The sparging system of the present invention uses an elastomeric check valve type nozzle to form the desired size of flotation bubbles in the column. The system... | 10/14/1997 |
| 5656155 | Thermophilic aerobic waste treatment system A system for thermophilic aerobic destruction of pathogenic organisms and organic matter within waste water treatment sludge includes a tank for maintaining the sludge and an air transfer apparatus for injecting air into the sludge near the bottom thereof... | 08/12/1997 |
| 5650070 | Aerobic long vertical shaft bioreactors An improved biomass waste treatment process wherein an aerobic biological reaction takes place in a vertical chamber having a first portion defining a first zone and a second portion defining a second zone below said first zone, said process comprising fe... | 07/22/1997 |
| 5630936 | Vertical drainage drying bed for waste sludge and an intensified method of treating wastewater A drying bed for waste sludge in a wastewater treatment facility having a vertical drainage riser extending vertically from a subnatant discharge pipe near the bottom of the drying bed. A sludge inlet at an end of the drying bed communicates with a source... | 05/20/1997 |
| 5626755 | Method and apparatus for waste digestion using multiple biological processes Methods and apparatus for treating waste streams utilize controlled introduction of microscopic gaseous bubbles to create, in a single vessel, as many as three separate biological environments in discrete, stratified zones. In preferred embodiments, bubbl... | 05/06/1997 |
| 5624562 | Apparatus and treatment for wastewater The present invention relates to the pretreatment and treatment of biodegradable wastewater utilizing a series of treatment modes within a single variable depth reactor apparatus to biologically reduce the biochemical oxygen and chemical oxygen demand in ... | 04/29/1997 |
| 5618417 | Water aeration system A water aeration system for receiving gas and/or iron laden water from a water source and delivering purified water to a service line. The system includes a tank with an internal volume fillable with water, a tank inlet, a tank outlet, and an aerator. Wat... | 04/08/1997 |
| 5614086 | Method and apparatus for removing contaminants from a water supply A bubble aeration system and method for removing radon and other contaminants from domestic or commercial water supplies in a single tank having a baffle arrangement or channels creating a sinuous water path for a more effective separation of radon from t... | 03/25/1997 |
| 5607593 | Installation for making water potable with submerged filtering membranes A water-treatment installation, notably with a view to making water potable, includes a reactor demarcating at least one treatment chamber, the reactor comprising a conveying assembly to convey the water to be treated into the chamber; a removing assembly... | 03/04/1997 |
| 5605634 | Treatment of contaminated groundwater The system places traces of nutrients and other treatment substances in the ground, in the path of an on-coming plume of contaminated groundwater. Boreholes placed across the plume contain respective diffusion tubes, the tubes being of e.g LDPE, or dialys... | 02/25/1997 |
| 5601724 | Method of aeration of liquids A tower-like pressure vessel utilizes the injection of gas bubbles for aeration of liquids. A cylindrical conduit extends vertically in the interior of the vessel. The interior conduit has a first end connected to an inlet liquid flow conduit and a second... | 02/11/1997 |
| 5591328 | Gas particle formation A method of gas particle formation in a liquid medium comprising the steps of: forming a substantially continuous film of gas on a surface having a discharge edge submerged in the liquid medium; generating a flow of liquid over the surface, adjacent to an... | 01/07/1997 |
| 5580449 | Sewage treatment apparatus Sewage treatment apparatus comprising a tank, aeration means which serve to aerate a biomass contained within the tank when the apparatus is in use, and air compressor means which are connected to the aeration means to deliver air thereto, in which the ai... | 12/03/1996 |
| 5578205 | Plant for removing micropollutants from untreated water by the combined action of ozone and hydrogen peroxide A plant for processing untreated water, particularly drilling water, to at least partially remove mircopollutants thereform. The plant includes at least one main feed pipe for feeding water into the bottom of a reactor via a submerged inlet at end of said... | 11/26/1996 |
| 5565098 | Reactor for the biological treatment of water A reactor for the biological treatment of water comprises a reactor vessel (1), a fermentation chamber (3) bounded in the vessel, inlets (10) for introducing influent into the fermentation chamber, a settling chamber (4) above the top boundary (2) of the ... | 10/15/1996 |
| 5558764 | Rag catcher A tank for the treatment of sewage. The tank has walls and a base and includes a screw conveyor and an aerator pipe to allow circulation of the sewage by the passage of air. The tank has projections extending inwardly from at least one of the walls or the... | 09/24/1996 |
| 5558763 | Sewage treatment system with air jetting means A sewage treatment system is provided, for cleaning a sewage by filtering solid components in the swage through floating filter medium, wherein the filtration performance can be improved and the filtration cleaning can be performed efficiently. The sewage... | 09/24/1996 |
