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| Number | Title | Issue Date |
| 8062525 | Process for treating water in a treatment plant The process according to the invention for treating water in a treatment plant comprising a reaction chamber in which a biodegradable material present in the water is biodegraded at least partly by microorganisms, in the course of which, at least temporarily, water ... | 11/22/2011 |
| RE40565 | Method and device for purifying waste water comprising an additional sludge treatment by ozonation Method for purifying waste water, whereby the waste water is subjected to a biological treatment producing sludge, part of this sludge being recycled towards the biological treatment while being subjected to ozonation combined with mechanical stirring. A mechanical ... | 11/11/2008 |
| 7384555 | Process for biological treatment of aqueous organic wastes A process and an apparatus for an aerobic biological treatment of aqueous organic wastes, in which the aqueous organic waste is supplied to an aeration tank for an aerobic biological treatment in the presence of a biosludge composed essentially of aerobic microorgan... | 06/10/2008 |
| 7354190 | Two-stage mixing system, apparatus, and method A two-stage mixing system, apparatus, and method produces a solution including a first substance and a second substance in a predetermined ratio by first mixing the first substance with a first liquid to produce a first solution and then mixing the first solution wi... | 04/08/2008 |
| 7279104 | Waste treatment method Disclosed is a system and method for treating domestic and industrial biological waste using diffusers to force circulation and aerate a treatment lagoon. Several lagoons may be used in series to treat raw waste and different variations may be employed to stepwise p... | 10/09/2007 |
| 7276165 | Method and plant for biological treatment of aqueous effluents for purification thereof The invention relates to a method for the biological treatment of effluents contaminated with impurities of urban or industrial origin, characterised in employing a single aeration tank (1) with a high mass charge in which the raw effluent or mechanically pre... | 10/02/2007 |
| 7121536 | Wave generator with oxygen injection for treatment of a body of fluid One embodiment of an aerator is disclosed that has a hollow intake housing with a horizontally disposed lip on a lower portion thereof. This intake housing converges a flow of bubbles into a draft tube. These bubbles are injected into a fluid in which the aerator is... | 10/17/2006 |
| 7063097 | In-situ gas blending and dilution system for delivery of dilute gas at a predetermined concentration Apparatus and method for delivery of dilute active fluid, e.g., to a downstream active fluid-consuming process unit of a semiconductor manufacturing plant. The delivery system includes an active fluid source, a diluent fluid source, a fluid flow metering device for ... | 06/20/2006 |
| 7018534 | Apparatus and method for controlling biomass growth in suspended carrier bioreactor The present invention provides a bioreactor comprising a vessel having a bottom region and an interior configured to contain an aqueous suspension of biomass and media. A first gas outlet is provided at the bottom region of the vessel. The first gas outlet is positi... | 03/28/2006 |
| 6780319 | Method and installation for treating effluents, comprising an additional treatment of the sludge by ozonization Method of purifying wastewater charged with organic matter which comprises a step of biologically treating the water, during which the organic matter contained in the water is degraded by micro-organisms thereby producing sludge, and a water-sludge separation step, ... | 08/24/2004 |
| 6395177 | Process and apparatus for decoloring liquids and water product thereof The invention relates to a method for decoloring liquids, in particular ground water, by means of a membrane filtration unit, wherein the following steps are carried out: i) subjecting the ground water to a biological treatment in a bioreactor; ii) feedin... | 05/28/2002 |
| 6337020 | Method and device for purifying waste water comprising an additional sludge treatment by ozonation Method for purifying waste water, whereby the waste water is subjected to a biological treatment producing sludge, part of this sludge being recycled towards the biological treatment while being subjected to ozonation combined with mechanical stirring. A ... | 01/08/2002 |
| 6303034 | Waste water ozonization process and apparatus During a waste water treatment process such as an activated-sludge process using microorganisms, the present invention ozonizes a microorganism-mixed liquid. It reduces the amount of microorganisms remaining, prevents a microorganism floc from sedimenting... | 10/16/2001 |
| 6299776 | Biochemical oxidation system and process A biochemical oxidation system and process is disclosed for the removal of insoluble sulfides from metal ores. A liquid mixture of an ore slurry and of a liquid biochemical oxidation medium is flowed through a plurality of covered overflow tanks connected... | 10/09/2001 |
| 6241897 | Dissolution of gas Liquid in which oxygen-containing gas is to be dissolved is pumped through a main and distributed into faster-moving subsidiary streams. Each subsidiary stream passes through a turbulence-inducing means and air or oxygen is introduced into the turbulent r... | 06/05/2001 |
| 6162359 | Method for recuperating vent gas coming from an ozonization reactor Process for recovering and reusing effluent gas from an ozonization reactor in a plant for treating effluent, especially sewage, which includes a biological reactor, a clarifier and an ozonization reactor. The effluent gas from the ozonization reactor is ... | 12/19/2000 |
| 6126830 | Method and apparatus for treating medical waste water Medical waste water is treated by passing it through a bioremediation tank and, thereafter, treating the water with ozone.... | 10/03/2000 |
| 6117324 | System and process for treating animal waste The present invention is generally directed to a process and system for treating animal waste. More particularly, the present invention is directed to a process and system for treating animal waste effluent with ozone to decompose the organic material wit... | 09/12/2000 |
| 5985150 | Process for the aerobic biological purification of water The invention is directed to a process for the aerobic purification of waste water in a reactor containing unsupported granular active sludge. The oxygen necessary for maintaining aerobic conditions within the reactor is provided in the form of an oxygen-... | 11/16/1999 |
| 5851399 | Process and arrangement for biodegrading pollutants in water The process serves for treating water polluted with pollutants which can only be degraded with difficulty by purely biological means. The water is circulated through a reactor vessel arrangement (24) in which it is treated with ozone which causes a prelim... | 12/22/1998 |
| 5820760 | Process for reducing nitrous oxide emission from waste water treatment An activated sludge process for reducing the amount of N2 O released to the atmosphere during biological oxidation of NH3, includes the following steps: mixing wastewater influent containing NH3 and BOD with activated slud... | 10/13/1998 |
| 5773283 | Systems and methods for biodegradation The present invention relates to the aerobic reaction of compounds such as aromatic, nitro-aromatic, halo-aromatic, halo-nitro-aromatic, aliphatic and halo-aliphatic compounds with a microorganism, said microorganism being a member of the group consisting... | 06/30/1998 |
| 5766477 | Process for treating a liquid reactive medium A process for the treatment of a liquid reactive medium with a gas comprising dispersing the gas in a liquid in which the gas is sparingly soluble to form a dispersion thereof, said liquid being maintained at a pressure (P1) greater than the pressure (P2)... | 06/16/1998 |
| 5688685 | System and methods for biodegradation of compounds The present invention relates to the aerobic reaction of compounds such as aromatic, nitro-aromatic, halo-aromatic, aliphatic and halo-aliphatic compounds with a microorganism, the microorganism being a member of the group consisting of microorganisms hav... | 11/18/1997 |
| 5463176 | Liquid waste oxygenation Disclosed is an improved method for oxygenation of liquid waste. The method comprises drawing a low pressure stream of liquid waste from a liquid waste tank and introducing an oxygen-containing gas thereto to provide a mixture of liquid waste and gas. The... | 10/31/1995 |
| 5348655 | Method for increasing the capacity of sewage treatment plant The present invention is directed to a method for increasing the capacity of a sewage treatment plant. In the method, oxygen is injected into the recycle sludge stream from the settling tank prior to introducing the recycle sludge stream into the secondar... | 09/20/1994 |
| 5332502 | Wastewater treatment A method for efficiently treating wastewater by aerobic digestion whereby on-site oxygen generating equipment continually provides a predetermined quantity of dissolved oxygen to the wastewater, the dissolved oxygen content being maintained at a predeterm... | 07/26/1994 |
| 5310484 | Preaeration treatment of volatile wastewater components A process is described for aerobically treating wastewater containing volatile compounds to degrade the volatile compounds without liberating them to the atmosphere. Influent wastewater and return sludge from an aerobic biophysical wastewater treatment sy... | 05/10/1994 |
| 5200080 | Waste treatment oxidation operations Bioremediation or other liquid waste biotreatment operations are enhanced by the use of turbulence promoters to create turbulent flow conditions in an oxygen/liquid waste dispersion prior to passage in an improved gas/liquid distribution system for passag... | 04/06/1993 |
| 5114587 | Method of sewage treatment The present invention refers to a process for wastewater treatment, wherein the amount of soluble organic matter is reduced by means of addition of nitrate. A relief of the wastewater treatment plants is obtained by the fact that the agent is added as ear... | 05/19/1992 |
| 5075007 | Biological wastewater purification with a downstream precipitation stage Wastewater containing impurities refractory to secondary treatment is first introducted into an aerobic biological treatment stage operating with an oxygen-enriched stream and subsequently into a precipitation stage where the biologically treated wastewat... | 12/24/1991 |
| 4898672 | Oxygen controlling wastewater treatment method A method of treating wastewater using an aeration tank of the type having an interior divided into at least a first chamber and a last chamber with each of the chambers having a lower portion and an upper portion and having liquid passageways in the lower... | 02/06/1990 |
| 4846964 | Fluidized-bed bioreactor process for the microbial solubiliztion of coal A fluidized-bed bioreactor system for the conversion of coal into microbially solubilized coal products. The fluidized-bed bioreactor continuously or periodically receives coal and bio-reactants and provides for the production of microbially solubilized c... | 07/11/1989 |
| 4705634 | Process and apparatus for the biological purification of wastewater In a process for the biological purification of wastewater, the wastewater is mixed with activated sludge in an aeration basin in the presence of carrier particles for microorganisms and is aerated with an oxygen-containing gas. Treated wastewater and fre... | 11/10/1987 |
| 4650585 | Method for minimizing diurnal swing in phosphorus content of effluent streams from wastewater treating plants Abnormally lowered reduction in the rate of phosphorus removal from influent wastewater in an activated sludge system, occurring particularly following periods of increase in flow rate of wastewater entering the system, is avoided by controlling the maxim... | 03/17/1987 |
| 4617123 | Processes and installations for treating waste waters issuing from the manufacture of sauerkraut The present invention concerns a process and an installation for the treatment of waste waters issuing from the manufacture of sauerkraut, this process and installation comprising a biological treatment step for treating waste waters leading to the format... | 10/14/1986 |
| 4582607 | Process for the biological treatment of waste water A method is disclosed for the biological aerobic purification of waste waters wherein a temperature from 30° to 60° C. is maintained in a first process stage and a temperature from 20° to 40° C. is maintained in a second process stage, with the t... | 04/15/1986 |
| 4566971 | Process and apparatus for the biological purification of wastewater In the biological purification of wastewater containing organic impurites, wherein the wastewater is passed through a reaction (1), e.g., continuous flow-stirred tank having circulating means (12) to achieve thorough mixing therein, or a fluidized bed or ... | 01/28/1986 |
| 4512895 | Pumpless clarifier apparatus and process for operation thereof in combination with a draft tube circulator/aerator An integral clarifier is provided that operates without a pump by deriving the clarifier feed stream and its accompanying pump head from the flow being pumped through the draft tube of a draft tube circulator/aerator assembly in a complete mix system or i... | 04/23/1985 |
| 4505820 | Method for cleaning waste water Method for cleaning waste water, wherein the waste water (19) and oxygen gas (31) are flowing in opposite directions through a cylindrical multireactor (20) having a central rotatable pipe (24), the multireactor comprising a number of bioreactors and at l... | 03/19/1985 |
