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| Number | Title | Issue Date |
| 8114293 | Method of operating a water treatment plant with immersed membranes A liquid treatment plant has sets of membrane trains and processing trains with flow between them through channels. Steps of withdrawing permeate and sludge from the trains are described. Cyclic aeration is provided to the membrane trains. Methods of foam control, b... | 02/14/2012 |
| 7713417 | Method for wastewater treatment with resource recovery and reduced residual solids generation A wastewater treatment system is provided including an aerobic membrane bioreactor and an anaerobic digester system connected to receive wasted solids continuously from the aerobic membrane bioreactor and also connected to return effluent from the anaerobic digester... | 05/11/2010 |
| 7326343 | Treatment of wastewater containing phosphorous and nitrogen A method and process for the treatment of wastewater containing phosphorous and nitrogen. The wastewater is first anaerobically treated to produce an anaerobic effluent from which insoluble organic carbon is separated to form a sludge rich in organic carbon that is ... | 02/05/2008 |
| 7318896 | Method and apparatus for utilization of recovered magnesium ammonium phosphate A method utilizing inorganic nutrient salts, which are inexpensive and easily usable, for waste water whose aerobic and/or anaerobic biological treatment cannot be established unless inorganic nutrient salts are added, is provided. A method and apparatus are provide... | 01/15/2008 |
| 7309435 | Biological process for waste treatment and energy production Processes for the treatment of organic waste are disclosed comprising digesting organic waste under anaerobic conditions so as to convert at least a portion of the organic waste and produce a clear decant and a mixture of biomass and unconverted organic compounds, r... | 12/18/2007 |
| 7300585 | Method of treatment of effluent stream A method for treating an effluent stream containing material which it is desired to remove from the effluent stream comprises treating the effluent stream with a solution of an acid and a first polymer to reduce the pH of the thus-treated stream to a range of about ... | 11/27/2007 |
| 7279100 | Methods and apparatus for treating wastewater employing a high rate clarifier and a membrane Methods and apparatus for treating wastewater are described, one method embodiment including the steps of flowing a mixed liquor suspended solids to a high rate clarification stage, forming a clarifier effluent, a first waste activated sludge stream, and a return wa... | 10/09/2007 |
| 7198716 | Phased activated sludge system The inventions describe a phased activated sludge treatment system that incorporates elements of batch treatment technology into a flow-through treatment process. Control of mixing and aeration systems are independent to facilitate the operation of the main reactor ... | 04/03/2007 |
| 7195712 | Wastewater treatment apparatus and method for removing nitrogen and phosphorus Provided is a wastewater treatment apparatus for removing nitrogen and phosphorus having an anaerobic tank, an anoxic tank, an aerobic tank and a clarifier, wherein the aerobic tank includes has a baffle installed at one side thereof to form a dissolved oxygen reduc... | 03/27/2007 |
| 7156998 | Phased activated sludge system The inventions describe a phased activated sludge treatment system that incorporates elements of batch treatment technology into a flow-through treatment process. Control of mixing and aeration systems are independent to facilitate the operation of the main reactor ... | 01/02/2007 |
| 7153431 | Method and system for utilizing activated sludge in a ballasted flocculation process to remove BOD and suspended solids A method and system for treating water or wastewater to remove both soluble BOD and suspended solids. The method entails a ballasted flocculation process where a flocculant and insoluble granular material is added to the water or wastewater to be treated causing sol... | 12/26/2006 |
| 7150290 | Unitary concrete pumping station for aqueous waste submersible pumping applications A unitary concrete structure pumping station useful in pumping waste fluids and the like during the passing of such materials from one part of a gravity flow waste system to another. This concrete structure is simple to install and use and many of the problems assoc... | 12/19/2006 |
| 7045063 | Treatment of swine wastewater by biological and membrane separation technologies The present invention provides an integrated system for treatment of biodegradable waste, including sewage sludge, forestry waste, food waste, agricultural waste, municipal waste, and the like. The integrated system comprises an anaerobic reactor, at least one aerob... | 05/16/2006 |
| 7025076 | Rainwater recovery system A system and method for restoring the natural water cycle by reducing stormwater runoff and addressing issues affecting groundwater supply. In one embodiment of the invention, the system comprises a roof washer component, cistern component, pump, and manufactured dr... | 04/11/2006 |
| 7001520 | Method for treating waste-activated sludge using elecroporation A method of treating of municipal sludge, paper-pulp sludge, animal and plant waste, and the like, whereby the treatment thereof via electroporation causes the breakdown of waste activated sludge, which is then recycled back to a bioreactor, or to one or more additi... | 02/21/2006 |
| 6818131 | System and process for CU-CMP wastewater treatment A system for the treatment of CMP wastewater, including wastewater from a copper CMP process. The wastewater treatment system includes a coagulant supply tank from which an FSC polymer coagulant is directed into a reaction tank that separately receives the untreated... | 11/16/2004 |
| 6805806 | Method and apparatus for treatment of wastewater employing membrane bioreactors Methods and apparatus employing membrane filtration in biodegradation processes for treatment of wastewater are described. A bioreactor system is described having an equalization system, a membrane bioreactor system, and a controller. Aeration systems for a membrane... | 10/19/2004 |
| 6793823 | Wastewater solids removal methods In a wastewater treatment process involving activated sludge, the invention provides a method for improving suspended solids removal without the need for chemical coagulants. Improved solids removal is obtained through the reintroduction of return activated sludge a... | 09/21/2004 |
| 6723244 | Method and apparatus to achieve nitrification at low solids retention times A new process configuration, which is based on nitrifier bioaugmentation, achieves essentially complete nitrification at low solids retention times (SRTs) on a year round basis for plants that have a minimum of two activated sludge treatment trains. The process util... | 04/20/2004 |
| 6709594 | Method for treating waste-activated sludge using electroporation A method of treating of municipal sludge, paper-pulp sludge, animal and plant waste, and the like, whereby the treatment thereof via electroporation causes the breakdown of waste activated sludge, which is then recycled back to a bioreactor, or to one or more additi... | 03/23/2004 |
| 6630070 | Wastewater treatment method and wastewater treatment equipment for recycling reactants and unreacted chemicals A wastewater treatment equipment is provided with a reaction tank and a separate reaction unit installed in the reaction tank. In the separate reaction unit, a reaction different from a reaction in the reaction tank is carried out with returned sludge and... | 10/07/2003 |
| 6613229 | Waste treatment method and apparatus with denitrification chamber A waste treatment method and apparatus including a denitrification chamber for denitrifying waste, an aeration basin for aerating the waste, and a clarifying device in which sludge particles separate out of the waste, leaving discharge and reusable sludge... | 09/02/2003 |
| 6602417 | Process for the treatment of waste water containing specific components e.g. ammonia A process is described for the biological treatment of waste water containing a specific component such as ammonia, wherein the waste water together with surplus sludge from an activated sludge reactor is treated in a bioaugmentation reactor, applying a h... | 08/05/2003 |
| 6585895 | Wastewater treatment process There is provided a process for treating industrial wastewater that substantially eliminates the generation of excess solids in the system requiring mechanical removal. The wastewater undergoes an equalization step wherein hydraulic flow is smoothed and t... | 07/01/2003 |
| 6572771 | Waste water treatment method An apparatus for treatment of fluorine waste water has an introduction tank, a main treatment tank, a calcium hydroxide tank, a polychlorinated aluminum tank, a macromolecular flocculant tank, a settling tank, and a concentration tank. Fluorine waste wate... | 06/03/2003 |
| 6569338 | Integrated vertical wastewater treatment vessel and method A vessel (10) for placement on a land site for sanitary treatment of wastewater, in which an inlet communicates wastewater and suspended solids through a mixing chamber (30) to an aeration zone (34) that receives air from nozzles (37) for biological diges... | 05/27/2003 |
| 6555002 | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) A wastewater treatment process that provides improved reduction of total solids through endogenous respiration while reducing biochemical oxygen demand and utilizing biological nutrient reduction. The wastewater treatment process uses an efficient aeratio... | 04/29/2003 |
| 6540919 | Method of treating waste-activated sludge using electroporation A system that allows the flexibility of primary and secondary treatment of municipal sludge, paper-pulp sludge, animal and plant waste, whereby the treatment thereof via electroporation may be used either as the primary dewatering treatment, secondary dew... | 04/01/2003 |
| 6491820 | Method for the molecular destruction of waste-activated sludge using high electrical voltage The present invention is directed to a pulsed electric-field system for rupturing and destroying molecular cellular units of waste-activated sludge to thereby liberate intracellular water molecules from the solids-content thereof. The waste-activated slud... | 12/10/2002 |
| 6444125 | Method of treating waste water for removing nitrogen and phosphorus and apparatus therefor A method of treating sewage or waste water for removing nitrogen and phosphorus as well as organic materials in the sewage or waste water, and an apparatus therefor are provided. The method applies intermittent aeration and dynamic flow to an equipment ha... | 09/03/2002 |
| 6406629 | Biological process for removing phosphorous involving a membrane filter A waste water treatment process for biologically removing phosphates incorporates a membrane filter. The process includes three zones, an anaerobic zone, an anoxic zone and an aerobic zone containing an anaerobic, anoxic and aerobic mixed liquor. Water to... | 06/18/2002 |
| 6395176 | Method for treating waste-activated sludge using electroporation A system that allows the flexibility of primary and secondary treatment of municipal sludge, paper-pulp sludge, animal and plant waste, whereby the treatment thereof via electroporation may be used either as the primary dewatering treatment, secondary dew... | 05/28/2002 |
| 6325933 | Process for biological purification of waste water under sludge retention A process for biological purification of waste water by the activated sludge method wherein the waste water is continuously passed through one or more treatment zones and a clarification zone, wherein the waste water treated in the last treatment zone at ... | 12/04/2001 |
| 6312599 | Method of using wastewater flow equalization basins for multiple biological treatments One or more flow equalization basins or lagoons are utilized for performing hydrolysis of ATP as the first stage of biological phosphorus reduction, selective reduction of biological oxygen demand (BOD), deamination, and denitrification of nitrate and nit... | 11/06/2001 |
| 6251277 | Method and device for purifying protein containing waste water The invention relates to a method for purifying protein containing waste water, In which a) a first insoluble material is caused to form in the waste water, b) the mixture obtained in step a) is separated to form pre-purified waste water, c) the pre-purif... | 06/26/2001 |
| 6235196 | Biological wastewater treatment system A bioprocessing system for a feed such as wastewater comprises an anaerobic reactor subsystem, an aerobic reactor subsystem, and a recycle loop for partial recycling of the aerobic reactor subsystem effluent. The anaerobic reactor subsystem is capable of ... | 05/22/2001 |
| 6207054 | Method of biologically cleaning polluted water A method of biologically cleaning polluted water uses active sludge and at least three zones, where at least one zone operates as a biological treatment zone and at least two zones variably operate as a biological treatment zone and as a clarifying zone. ... | 03/27/2001 |
| 6163932 | Process, using ammonia rich water for the selection and enrichment of nitrifying micro-organisms for nitrification of wastewater The present invention comprises a method for biological oxidation of nitrogen in water, e.g., wastewater, nitrification, by using ammonia-rich water for the selection and enrichment of nitrifying micro-organisms in a separate aerated reaction volume, wher... | 12/26/2000 |
| 6106717 | Method for treating organic waste water A method of treating an organic waste water, which is capable of separating and recovering phosphorus components in a liquid or solid form, is provided. According to the method of the present invention, reuse of phosphorus components can be facilitated, w... | 08/22/2000 |
| 6106716 | System for purification of domestic household effluent The invention provides a system 10 for treatment and purification of domestic household effluent, and for the elimination within said system of organic solid wastes, comprising elements 12 and 14 for separately collecting first and second constituents of ... | 08/22/2000 |
