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| Number | Title | Issue Date |
| 7892432 | Organic waste treatment using anaerobic and facultative anaerobic bacteria A method to prepare an organic composition for a digestor minimizes injury to and enhance the decomposition function of anaerobic and facultative anaerobic bacteria in the organic composition. The method is utilizes at an animal processing facility. Manure produced ... | 02/22/2011 |
| 7771598 | Apparatus, methods and systems for handling and processing waste material Apparatus, methods and systems for processing waste are provided. For example, a system for processing waste, wherein the waste comprises hard particulates embedded therein, can be provided. The system can comprise a waste disruptor, wherein the waste disrupter disr... | 08/10/2010 |
| 7531093 | Process for the aerobic-thermophilic stabilization and disinfection of sludge Disclosed is a method for the aerobic-thermophilic stabilization and decontamination of sludge, in which a) raw sludge having a dry substance concentration of 3 to 7 percent by weight is fed to a first stage and remains there for an average dwell time of four to ten... | 05/12/2009 |
| 7270751 | Method for treatment of sewage plant sludges by a fungal process The invention relates to a method for treatment of predominantly urban sewage plant sludges, characterised in comprising a step for treatment of the sludges by microfungi. ... | 09/18/2007 |
| 7258790 | Controlled eutrophication system and process A controlled eutrophication system and process are disclosed. The system includes the combination of a partitioned aquaculture system in conjunction with an anaerobic digester. Wastewater containing pollutants, such as nitrogen and phosphorus, are fed to the partiti... | 08/21/2007 |
| 7255793 | Methods for removing heavy metals from water using chemical precipitation and field separation methods A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation ” technology such as magnetic separation, dissolved air flotation, vortex separation, or expanded plastics flotation, effectivel... | 08/14/2007 |
| 7211429 | Organic waste material treatment process An organic waste material treatment process comprising subjecting the organic waste material to conditions under which anaerobic digestion occurs followed by conditions under which aerobic composting occurs. Preferably, the organic waste material is pre-conditioned ... | 05/01/2007 |
| 7186339 | Anaerobic digester system for animal waste stabilization and biogas recovery An ambient anaerobic digester system for anaerobic digestion of animal waste with biogas production and recovery is provided. The anaerobic digester system includes a substantially flexible bladder for anaerobically digesting the animal waste with biogas production ... | 03/06/2007 |
| 7179642 | Method and apparatus for solids processing Apparatuses and methods for anaerobic digestion of high-solids waste are provided. The methods may include and the apparatuses may be used for moving the solid waste in a corkscrew-like fashion through a closed container. The method may further include moving the hi... | 02/20/2007 |
| 7160456 | Method and equipment for processing organic material A method for processing organic material, in which method bioconversion is performed on the organic material in at least one first reactor, the biogas formed in the bioconversion is treated with ammonia in at least one second reactor and buffer solution produced in ... | 01/09/2007 |
| 7153428 | Flooded densified leachbed anaerobic digestion The present invention provides improved systems and processes for performing sequential batch anaerobic composting (SEBAC) on high solids content wastes. In particular, the present invention provides improved flooded SEBAC systems that function more efficiently (i.e... | 12/26/2006 |
| 7147780 | Process for reducing sludge derived from the treatment of wastewater by oxygenation and mechanical action A method for reducing the production of sludge derived from the treatment of wastewater. The sludge is subjected to a mechanical action in the presence of a gas containing oxygen. The mechanical action is performed in such a way as to destroy the cell walls of betwe... | 12/12/2006 |
| 7101482 | Method and facility for treatment of sludge derive from biological water purification facilities A process and system for treating excess sludge produced from a biological treatment system. The process includes biologically treating water or wastewater and producing excess sludge. The excess sludge is directed to a solubilizer where the sludge is solubilized. T... | 09/05/2006 |
| 7089684 | System and method for converting a biosolid sludge to a pasteurized stage for use as an organic fertilizer A system for processing biosolids from a sludge pond into fertilizer comprising: a portable dewatering system for removing liquid from sludge, the portable dewatering system having: a collection device for collecting sludge from the sludge pond; a centrifuge for rem... | 08/15/2006 |
| 6984305 | Method and apparatus for sustainable energy and materials A process for the production of hydrogen from anaerobically decomposed organic materials by applying an electric potential to the anaerobically decomposed organic materials, including landfill materials and sewage, to form hydrogen, and for decreasing the time requi... | 01/10/2006 |
| 6984324 | Wastewater treatment A method for the treatment of sewage sludge which comprises the step of applying to the sludge a biologically effective amount of a composition which contains a lignosulfonate and sludge digesting microbes, preferably from the genus bacillus. The method may b... | 01/10/2006 |
| 6966941 | Sewage sludge treatment An apparatus and method for treating organic waste sludge such as sewage sludge is disclosed wherein the sludge is first dewatered, moved to a day hopper for storage, and then successively passed through first and second reactors. As the sludge is passed through the... | 11/22/2005 |
| 6966989 | Method and installation for the thermal hydrolysis of sludge The invention relates to a method for the thermal hydrolysis of sludge characterized in that it is carried out in at least two reactors operating in parallel, in each of which the sludge undergoes a complete thermal hydrolysis cycle. Said cycle comprises different s... | 11/22/2005 |
| 6929744 | Sludge treatment at a mesophilic temperature A method of treating sewage sludge comprises incubating raw sludge at a temperature in the mesophilic range to reduce the pathogen content of the sludge. ... | 08/16/2005 |
| 6919027 | Method for treating bio-organic and wastewater sludges An improved process of treating sludge to provide a stable product for use as a beneficial soil or fertilizer for agricultural lands which includes the steps of: (a) mixing sludge with at least one alkaline material in an amount sufficient to raise pH of the mixture... | 07/19/2005 |
| 6911149 | Induced sludge bed anaerobic reactor An induced sludge bed anaerobic reactor includes a vessel in which a septum or other partition is positioned to maintain solids in wastewater being treated toward a lower zone in the reactor. A central aperture is formed in the septum into which a sludge blanket con... | 06/28/2005 |
| 6908555 | Biosolids flow-through thermophilic treatment process A method of treating wastewater sludge includes pumping, continuously, raw sludge into a first digester and treating the raw sludge at a specific temperature of between about 51° C. to 60° C.; transferring the treated wastewater sludge to a batch tank; treating th... | 06/21/2005 |
| 6905600 | Method and apparatus for the treatment of particulate biodegradable organic waste A method for treating particulate biodegradable organic waste includes sizing the waste and adding a base prior to introducing the waste to a thermal hydrolysis reactor and hydrolyzing the waste at a temperature of about 130° C. or greater and a pressure greater th... | 06/14/2005 |
| 6893566 | Sewage treatment system A sewage treatment system is disclosed in which a waste stream is separated into a primary sludge and water effluent, and the primary sludge is anaerobically digested and dewatered to produce a Class A biosolid. The water effluent is aerobically digested and separat... | 05/17/2005 |
| 6875355 | Denitrification system for nitrified wastewater or nitrified water A denitrification system for denitrified wastewater or nitrified water treatment using a detergent or detergent-like compound comprising available carbon. The system comprises a plurality of interconnected tanks including a mixing tank which feeds detention tanks wh... | 04/05/2005 |
| 6719903 | Process and apparatus for treating biosolids from wastewater treatment A process and apparatus for treating biosolids from biological wastewater treatment. The temperature of autothermal aerobic treatment of biosolids is controlled by sensing the oxidation/reduction potential of the solution and adjusting the amount of oxygen or biosol... | 04/13/2004 |
| 6685834 | Method for conditioning and dewatering thermophilic aerobically digested biosolids A Method of treating sludge prior to dewatering by mixing with the sludge a cationic metal in the form of an iron or aluminum slat along with a cationic polymer. The addition of the iron or aluminum salt substantially reduces the amount of polymer require... | 02/03/2004 |
| 6673243 | Plug flow anaerobic digester A simple, reliable, inexpensive, and efficient anaerobic digester for treating organic wastes at a shortened residence time is described. The anaerobic digester is a multi-chambered digester that can handle wastewater and sludge in a large volume at a hig... | 01/06/2004 |
| 6635178 | Pathogen inactivation in biosolids with cavitation A process for destroying pathogens in sludges/biosolids using rotor-stator technology to produce cavitation for pathogen destruction, combined with the feeding of lime or other alkaline material to induce heat and ammonia gas release. The combination of t... | 10/21/2003 |
| 6632362 | Vacuum retort anaerobic digestion (VRAD) system and process This invention pertains generally to anaerobic digesters, and more particularly to a system and process that extends the range of acceptable biomass feedstock concentrations and provides pH process control of all known digestion processes: by the creation... | 10/14/2003 |
| 6572772 | Digester method for processing farm waste A digester method and system for processing farm waste is provided. Specifically, the present invention provides a small-scale digester that processes approximately 0.1% to 10% of a raw waste stream at a temperature of approximately 100° F. The remaining... | 06/03/2003 |
| 6569334 | METHOD OF HIGH-CONCENTRATION CULTURE OF NITRIFYING BACTERIA OR DENITRIFYING BACTERIA CONTAINED IN ACTIVATED SLUDGE, CULTURE PROMOTER TO BE USED IN HIGH-CONCENTRATION CULTURE METHOD OF NITRIFYING BACTERIA, AND METHOD OF WEIGHT LOSS TREATMENT OF ACTIVATED SLUDGE A method for incubation of nitrifying bacteria in a high concentration which are contained in small amount in activated sludge includes subjecting the activated sludge to nitrification and acclimation culture for about one to two months using a sludge-tre... | 05/27/2003 |
| 6569332 | Integrated anaerobic digester system A process to recover energy, reduce pollution potential, and add value to organic waste such as animal manure is described. The process involves the anaerobic digestion of feedstocks, such as animal manure, at low to high temperatures in batch, semi-conti... | 05/27/2003 |
| 6514411 | Process for controlling foam in a treatment reactor The invention relates generally to a process and apparatus for treating biosolids resulting from the treatment of biological wastewater streams. The invention relates to autothermal aerobic treatment of biosolids where temperature is controlled by adjusti... | 02/04/2003 |
| 6500340 | Pasteurizing sludge to exceptional quality An anaerobic process in accordance with the present invention includes the step of digesting an organic substrate in a first anaerobic reactor to provide reactor contents comprising solids and liquid products of digestion. The process also includes a step... | 12/31/2002 |
| 6447683 | Pathogen destruction process for biosolids A method of treating a waste stream comprising feeding a waste stream into a reactor constructed and arranged for a fast start and maintained in a thermophilic temperature regime of between about 50° C. and 62° C. for a HRT of less than or equal to 48 h... | 09/10/2002 |
| 6410305 | Treatment of animal waste A process and composition for treating an animal waste in a waste holding facility to reduce sulfides and enhance efficient degradation of large amounts of organic matter with reduced odor. The process includes administering a probiotic material capable o... | 06/25/2002 |
| 6379545 | Modular wastewater treatment system A modular system for treating wastewater is designed having different phases. In an initial phase, plural tanks are provided, including at least one reactor and digester tank. In a subsequent phase, at least one of the tanks is converted into a different ... | 04/30/2002 |
| 6361694 | Enhanced biomass digestion through intermittent injection of propane Anaerobic digestion of a biomass system can be made more effective by intermittently introducing propane from an external source into said biomass system. The propane is preferably introduced into the biomass for about 20% to about 80% of any given time p... | 03/26/2002 |
| 6299775 | Waste and wastewater treatment and recycling system A waste and wastewater treatment and recycling system separates blackwater and greywater at their respective sources and includes a waste separation system for decomposing the blackwater into water vapor and carbon dioxide gas, a wastewater treatment syst... | 10/09/2001 |
