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| Number | Title | Issue Date |
| 8101082 | Waste-activated sludge treatment methods and apparatus A method for treating waste-activated sludge comprises adding (1) a pozzolanic material to waste-activated sludge to form a mixture. The mixture is homogenized and aerated (2). The pozzolanic material reacts with the waste-activated sludge. The mixture... | 01/24/2012 |
| 7820049 | Method for manufacture of sanitized organic sludge It is described a method for manufacture of sanitised organic sludge, said method comprising the following steps: mechanical mixing of a cellulose containing component, a super absorbent and dewatered organic sludge; leading the mixture to a sanitising container; co... | 10/26/2010 |
| 7410584 | 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 stream comprising mixed liquor suspended solids and fixed growth solids to a high rate clarification stage, forming a clarifier effluent, a first wast... | 08/12/2008 |
| 7402247 | System for wastewater treatment and digestion having aerobic and anaerobic treatment zones The specification discloses a method for treating and digesting organic wastes in a wastewater stream. A first wastewater influent stream is mixed with an activated sludge biomass in an aerobic digestion zone, so that least a portion of the organic wastes in the fir... | 07/22/2008 |
| 7332084 | Process for biological treatment of organic wastewater and apparatus therefor A multistage activated sludge process involving a predation effect caused by microorganisms realizes further improvement in treatment efficiency and further decrease in the amount of excess sludge generated while a stable quality of the treated water is maintained. ... | 02/19/2008 |
| 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 |
| 7311833 | Zero excess sludge membrane bioreactor An inclined plate coupled membrane bioreactor for treating feed water having excessive level of nutrients in particular chemical oxygen demand and total nitrogen and suspended solids has an aerobic bioreactor for nitrification and aerobic biodegradation in which mem... | 12/25/2007 |
| 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 |
| 7291265 | Passive treatment of wastewater and contaminated groundwater A bioremediation system using inorganic oxide-reducing microbial consortia for the treatment of, inter alia coal mine and coal yard runoff uses a containment vessel for contaminated water and a second, floating phase for nutrients. Biodegradable oils are preferred n... | 11/06/2007 |
| 7285215 | Process for improving phosphorus removal in waste water treatment without chemical addition A wastewater treatment process wherein a portion of a mixture of influent waste water and biomass are transferred from a first anaerobic region to a second anaerobic region having a relatively long retention time in order to produce additional very short chain fatty... | 10/23/2007 |
| 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 |
| 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 |
| 7252765 | Process for improving phosphorous removal in waste water treatment without chemical addition A wastewater treatment process wherein a portion of a mixture of influent waste water and biomass are transferred from a first anaerobic region to a second anaerobic region having a relatively long retention time in order to produce additional very short chain fatty... | 08/07/2007 |
| 7235178 | Process and assembly for the treatment of waste water on ships Process for treating waste water on ships in which the waste water is pretreated by surface filtration, the pretreated waste water being collected in a first tank acting as a mixing tank and optionally enriched with oxygen. The waste water from the first tank is con... | 06/26/2007 |
| 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 |
| 7172698 | Anaerobic sludge digester An egg-shaped anaerobic sludge digester has upper and lower draft tubes, and an optional middle draft tube. The draft tubes are arranged so that liquid can be (1) simultaneously pumped downwards through the upper (or middle) draft tube and upwards through the lower ... | 02/06/2007 |
| 7172699 | Energy efficient wastewater treatment for nitrogen and phosphorus removal In a wastewater treatment plant, the liquid side of the plant has preferably four stages for nitrification and/or denitrification, prior to further treatment such as a clarifier. Energy requirements are reduced by reducing aeration requirements. Four or more tanks/z... | 02/06/2007 |
| 7169306 | Versatile pre-thickened aerobic digester system An aerobic digester system in a wastewater treatment plant is made more versatile for different conditions by addition of an equalizer basin or in some embodiments, a bypass pipe. If infeed is received from a sequential batch reactor or from a concentrated septage, ... | 01/30/2007 |
| 7166220 | Systems and methods for organic wastewater treatment A system and method for organic wastewater treatment through denitrification and nitrification processes. The system for treating organic wastewater includes a multistage treatment tank having at least two stages in series. Each stage has a denitrification tank and ... | 01/23/2007 |
| 7163631 | Process for treating wastewater containing peracetic acid The present invention disclose a process for treating a wastewater from a foodstuff factory, wherein the pipelines are cleaned and the containers are sterilized by using a water containing peracetic acid as an disinfection agent. The process of the present invention... | 01/16/2007 |
| 7160442 | Apparatus for reduction of biological wasted sludge The apparatus for reducing biological wasted sludge includes a sludge hydrolysis reactor, a sludge neutralization reactor and a membrane bioreactor (MBR). The method of the present invention includes subjecting a biological wasted sludge to hydrolysis and neutraliza... | 01/09/2007 |
| 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 |
| 7147777 | Wastewater treatment system with membrane separators and provision for storm flow conditions In a wastewater treatment system and process utilizing membrane bioreactors (MBRs), multiple, parallel series of tanks or stages each include, an MBR stage. Under conditions of normal flow volume into the system, influent passes through several parallel series of st... | 12/12/2006 |
| 7147781 | Backwash system and method for waste water treatment system A backwash system and method for a waste treatment system employ a waste inlet duct extending into an accumulation of microbial growth media particles in a lower region of a tank, with a vertical duct having a duct outlet in an upper region of the tank. A downwardly... | 12/12/2006 |
| 7147778 | Method and system for nitrifying and denitrifying wastewater A wastewater treatment system is provided that includes first and second reactors, each operative to nitrify or denitrify wastewater contained therein. Downstream from the first and second reactors is a membrane reactor that operates under aerobic conditions and inc... | 12/12/2006 |
| 7105091 | Waste treatment with control over biological solids Waste-treatment processes are enhanced through generation and introduction of specific biological populations customized to perform or favor specific tasks either during the main process, or for solids minimization purposes in a post-treatment process. These bacteri... | 09/12/2006 |
| 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 |
| 7060669 | Process for partitioning of proteins The present invention relates to isolation and purification of proteins in aqueous two-phase systems (ATPS). Specifically the invention provides processes for partitioning of proteins of interest in ATPS by fusing said proteins to targeting proteins which have the a... | 06/13/2006 |
| 7033503 | Municipal wastewater treatment apparatus and process with a continuous feed and cyclic aeration Disclosed are efficient municipal wastewater treatment apparatus and process characterized in that the nitrogen is removed by nitrification and denitrification reaction in the cyclic aeration reactor wherein Anaerobic state, Anoxic state and Oxic state are change in... | 04/25/2006 |
| 7022237 | Aerobic wastewater management system, apparatus, and method A septic tank (11) having two separate compartments, a trash tank (13) and a mix liquor compartment, using aerobic bacteria to process waste, and methods of its use. A settling compartment allows heavy particles to settle while keeping lighter debris o... | 04/04/2006 |
| 7018536 | Aerobic wastewater management system, apparatus, and method A wastewater processing and treatment system utilizes aerobic bacteria in two separate compartments to break down and digest waste. The first settling compartment between the trash tank and the mix liquor compartment is non-existent in conventional aerobic units. Th... | 03/28/2006 |
| 7011757 | Process for recycling mixed liquor with dual-use jet recirculation pumps to provide highly efficient wastewater treatment A process that removes nitrogen by the MLE Process or nitrogen and phosphorus by the Bio-P Process from municipal or industrial wastewaters by combining at least one dual-use jet recirculation pump with jet manifolds disposed at the bottoms of deep tanks functioning... | 03/14/2006 |
| 6958121 | Aerobic digester for bodily waste material A digester is provided for aerobically and microbially digesting a batch of bodily waste material, such as an aqueous slurry of pig manure. The digester comprises side-by-side digestion and separation compartments, separated by a partition wall. A first slanted pipe... | 10/25/2005 |
| 6946073 | Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent Removal of biological nutrients from a wastewater yielding a low phosphorous (e.g., less than 0.25 mg/L) output includes providing a serial multistage bioreactor containing activated sludge having in hydraulic series an anaerobic zone and a downstream aerobic zone, ... | 09/20/2005 |
| 6942801 | Apparatus and process for aerobic digestion of organic sludge An apparatus for treating organic sludge by aerobic digestion has an aerobic digestion tank 1, a circulation line 6 provided with a pump for pumping circulated sludge, a liquid/gas ejector 7 for aspirating an oxygen-containing gas, which has bee... | 09/13/2005 |
| 6921486 | Waste activated sludge anaerobic contact waste stream treatment process The waste activated sludge anaerobic contact waste stream treatment method and system for treating a waste stream may have an influent waste stream communicated to an anaerobic contact element. A waste activated sludge produced from a second influent waste stream pr... | 07/26/2005 |
| 6916422 | Self-adaptive method for regulating an effluent treating plant, in particular for waste water The invention concerns a method for regulating a wastewater or sludge treating plant. Ponds and cells provided with aerating means are used for eliminating carbonaceous, nitrogenous, and phosphate pollutants. The invention is characterized in that an automaton uses ... | 07/12/2005 |
| 6837997 | Disposal of sediment from pond or lagoon at petroleum refinery Method and system for removing accumulated sediment at the bottom of a waste pond or lagoon of a wastewater treatment plant for a petroleum refinery. The system comprises a primary oil separation stage for separating hydrocarbons from the wastewater stream by gravit... | 01/04/2005 |
| 6830689 | Process for removing phosphorus from wastewater utilizing a triple basin wastewater treatment system A multi-phase process for removing phosphorus from wastewater in a triple ditch or triple basin system where wastewater influent is sequentially directed to each of the three basins or ditches, sometimes referred to as first and second outer basins and an intermedia... | 12/14/2004 |
