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Aerobic treatment

Subclass of:

210 - Liquid purification or separation

210600000 - PROCESSES

210601000 - Treatment by living organism

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
210620000 Aerobic treatment 85
20100038311Entrapping immobilization pellets, wastewater treatment system using the entrapping immobilization pellets and wastewater treatment method - The entrapping immobilization pellets satisfy conditions: (A) the deformation rate expressed by (H02-18-2010
20120024782METHOD AND APPARATUS FOR TREATING AN OIL SPILL - A method for enhancing biodegradation of oil in water, the method comprising: 02-02-2012
20090045134Ballast water intake and treatment system - A ballast water intake and treatment system is disclosed, the system including a membrane treatment unit arranged in or on a ship hull for the separation of microorganisms of no smaller than a given size and organized to execute filtration during the intake of sea water or fresh water outside the hull into ballast tanks by the use of an intake pump installed consecutively with the membrane treatment unit. The system checks the invasion of microorganisms, etc. of no smaller than a given size during the intake of ballast water and allows ballast water free of microorganisms, etc. of no smaller than a given size to be fed into ballast tanks.02-19-2009
20110011800BIOLOGICAL NITROGEN REMOVAL - The present invention relates to a method of treating a liquid to extract at least one of carbon, sulphur, nitrogen or phosphate from liquids such as waste water. Preferably, the invention is employed to remove nitrogen from waste water. In an alternate for the invention provides a wastewater treatment system.01-20-2011
20110011799PROCESS FOR REMOVING SULFIDE FROM ALKALINE WASHING LIQUIDS - Alkaline solutions resulting from extracting sulfide from hydrocarbon fluids can be treated in a combination of one or more electrodialysis cells and a bioreactor. The electrodialysis cell (01-20-2011
20120234754ORGANIC WASTEWATER TREATMENT DEVICE AND ORGANIC WASTEWATER TREATMENT METHOD - An organic wastewater treatment apparatus comprises a biological treatment tank provided with a whole floor aeration section in which a first aerator is disposed so as to perform whole floor aeration, a solid-liquid separation section formed above the whole floor aeration section and provided with a membrane separation device immersed in activated sludge, and a flow path narrowing section formed between the whole floor aeration section and the solid-liquid separation section so as to vertically separate the whole floor aeration section and the solid-liquid separation section, wherein the flow path narrowing section includes a flow path narrowing device configured to narrow a cross-sectional area of the flow path from the whole floor aeration section to the solid-liquid separation section so as to combine fine air bubbles discharged from the first aeration device to each other and discharge the combined bubbles to an area below the membrane separation device.09-20-2012
20080296221METHOD AND SYSTEM FOR THE TREATMENT OF WASTEWATER - A wastewater treatment system for treating wastewater by processes which include aeration. The system includes an influent conduit for delivery of wastewater to be processed and a treatment tank for processing of the wastewater. Also included is an air conduit for providing compressed air for aeration of the wastewater and a particle size regulation device disposed between the conduit and the tank, wherein the particle size regulation device regulates a size of particles present in the wastewater to provide particle size regulated wastewater. The system also includes at least one aeration jet having a nozzle diameter sized to allow the particle size regulated wastewater to pass through the nozzle.12-04-2008
20080272050Multi-Barrier Water Purification System and Method - Disclosed herein are systems and methods for decontaminating a contaminated fluid that integrate ultraviolet radiation in an advanced decontamination process, and a honing material, along with a cross-flow membrane filter, into a single closed-loop system. This approach combines the advantages of chemical-free advanced decontamination technology, long-life wiper-free UV disinfections, and maintenance-free ceramic MF/UF membranes to provide multi-barrier protection. Such technique provides a 100% fluid recovery system (zero reject stream). In one embodiment, the system comprises a filtration membrane and a honing material located in the contaminated fluid that is sufficient to scrub foulants from the membrane, as well as any other components that honing material comes in contact with, while forming a dynamic filtration coating on the membrane as the contaminated fluid pass through the membrane. The system may also comprise an advanced decontamination process sufficient to destroy, by oxidation or reduction, biological and organic contaminants from the contaminated fluid.11-06-2008
20110278221INSTALLATION FOR THE TREATMENT OF UREA-CONTAINING WATER, TOILET, STABLE, AND METHOD - The invention relates to a device for treating urea-containing water. The invention also relates to a domestic toilet provided with such a device. The invention also relates to an animal accommodation provided with such a device. In addition, the invention comprises a method for treating urea-containing water. The device comprises a nitrification unit adapted to oxidize urea to nitrates and carbon dioxide, wherein the nitrification unit is also provided with an oxygen feed, a gas discharge and a throughfeed for feed of waste water nitrified by the nitrification unit to a filtration unit connected to the nitrification unit. The nitrification unit preferably comprises nitrifying bacteria.11-17-2011
20100200501GREEN SYNTHESIS OF NANOMETALS USING PLANT EXTRACTS AND USE THEREOF - The present invention relates to methods of making and using and compositions of metal nanoparticles formed by green chemistry synthetic techniques. For example, the present invention relates to metal nanoparticles formed with solutions of plant extracts and use of these metal nanoparticles in removing contaminants from soil and groundwater and other contaminated sites. In some embodiments, the invention comprises methods of making and using compositions of metal nanoparticles formed using green chemistry techniques.08-12-2010
20110290722ACTIVATED SLUDGE PROCESS IN WASTEWATER TREATMENT - The present disclosure relates to methods of treating highly contaminated wastewater using waste activated sludge as an adsorbent.12-01-2011
20080251452"In-situ" ballast water treatment system and method - A method and system for ballast water treatment are provided. Living organisms are added into a vessel's ballast water tank (e.g., via an existing vent) to consume (i) oxygen dissolved in ballast water contained in the ballast water tank, and (ii) food sources for selected organisms contained in the ballast water.10-16-2008
20080264860MULTI-GAS BIOREACTOR AND RELATED METHODS - A bioreactor is for processing a fluid stream. The bioreactor may include a bioreaction chamber for receiving the fluid stream therethrough, a pair of spaced apart gas header assemblies within the bioreaction chamber for coupling to first and second gases, a first plurality of hollow fiber membranes (HFMs) extending between the pair of gas header assemblies for introducing the first gas into the fluid stream within the bioreaction chamber, and a second plurality of HFMs extending between the pair of gas header assemblies for introducing the second gas into the fluid stream within the bioreaction chamber.10-30-2008
20080277340METHOD FOR CONTROLLING FOULING OF A MEMBRANE FILTER - A membrane bioreactor system includes one or more biological reactors and one or more membrane tanks with each membrane tank having one or more membrane filters. To control membrane fouling, various process control variables are employed. First, the membrane filters are cleaned by an air scouring process where bubbles are moved upwardly adjacent the membrane filters and clean the same in the process. To control membrane fouling, a process is utilized that dynamically varies the air scouring flow rate (V) as a function of transmembrane pressure (TMP). In addition, the process entails allowing permeation to start and stop which results in a series of cycles where each cycle includes a permeation phase and a relaxation phase. The duration of the relaxation phase (TR) and the duration of the permeation phase (TP) is varied from cycle to cycle as a function of one or more process variables including the change in TMP over a selected period within a membrane phase, or the change in TMP over a selected time period spanning at least two membrane phases.11-13-2008
20130118977Process and Apparatus for Gas-Enriching a Liquid - Methods and apparatuses are described for enriching a first liquid with a gas and introducing the gas-enriched first liquid into a second liquid. In an embodiment, the apparatus comprises a vessel containing the gas at an elevated pressure, a liquid fluid inlet into the vessel such that the first liquid enters the vessel and becomes enriched with the gas, a variable internal valve defining an opening through which the gas-enriched first liquid flows after exiting the vessel, the internal valve opening adapted to generate bubbles of the gas within the gas-enriched first liquid as the gas-enriched first liquid flows therethrough, and a tube through which the gas-enriched first liquid flows into the second liquid, the tube comprising an inlet section comprising an inlet, a coiled section fluidically coupled to the inlet section, an outlet section fluidically coupled to the coiled section, and an outlet fluidically coupled to the outlet section, the tube adapted to maintain the bubbles of the oxygen-containing gas generated within the gas-enriched first liquid by the valve means.05-16-2013
20100200502SEPTIC SYSTEM REMEDIATION METHOD AND APPARATUS - A wastewater treatment apparatus for a wastewater treatment system that includes a septic tank with a lower sludge layer, an upper effluent layer, and a tank floor. The wastewater treatment apparatus includes a positive pressure pump that is configured to pump a fluid, and a tube that has an outlet that is spaced from the tank floor. The tube is in fluid communication with the positive pressure pump.08-12-2010
20100193433Vertical Land-Based Bioreactor - A bioreactor for treating a liquid comprises a container having a vertical wall portion with at least one inlet port and at least one outlet port. The bioreactor also comprises a media support platform securely disposed inside the container at a position below the inlet and outlet ports, and substantially permeable to liquid. The bioreactor comprises at least one cylindrical chamber inside the container at a position above the media support platform. The bioreactor also comprises a plurality of media units topically disposed on the media support platform. The bioreactor comprises a recirculation/aeration system secured at a bottom end of the cylindrical chamber. The recirculation/aeration system has a submersible pump device that can be programmed to pump liquid at variable speeds and has a liquid intake portion having perforations, an air intake tube, and an eductor device. The air intake tube protrudes through a top port of the container.08-05-2010
20100252500TREATMENT OF SPENT CAUSTIC WASTE - Systems and methods are provided for the treatment of caustic wastewater. Specifically, systems and methods are provided for combining refinery spent caustic and ethylene spent caustic solutions and treating the combined spent caustic mixture using a wet air oxidation process.10-07-2010
20100300965DIFFUSER APPARATUS, AND DIFFUSER APPARATUS RUNNING METHOD - The present invention provides a diffuser apparatus which has fine pores capable of achieving a high oxygen transfer efficiency and rarely becoming clogged so that the apparatus can be operated stably over a prolonged period. The diffuser apparatus according to the present invention includes: an aeration plate 12-02-2010
20110000851High Performance Nitrifying Sludge For High Ammonium Concentration and Low Temperature Wastewater Treatment - Compositions of bacteria which are effective for the nitrification of wastewater, particularly at low temperatures, are described. The compositions are comprised of 35 strains or populations of at least partially characterized isolated bacteria. These compositions may be used to treat wastewater contaminated with animal fecal waste and/or ammonia. In use, wastewater is contacted with the bacterial composition of the invention under aerobic conditions and for a period of time effective to oxidize ammonia therein.01-06-2011
20110042309SOLAR POWERED AERATION AND MICROBIAL INCUBATION SYSTEM - Disclosed is a system and method for treating a body of water, without the necessity of being connected to an electrical grid, that includes photovoltaic collectors and a battery bank that is charged by the photovoltaic collectors. The photovoltaic collectors and the battery bank operate a series of air pumps that are connected to an air pump manifold to create a uniform source of compressed air that is distributed to a plurality of floating diffuser manifolds. A plurality of air stones are suspended under the floating diffuser manifolds that create air bubbles that are absorbed by the body of water and circulate said body of water to disburse a microbial fluid. In addition, an incubator system is also connected to an air pump that incubates microbes to form a microbial fluid that can be automatically dispersed throughout the body of water.02-24-2011
20110068058APPARATUS AND PROCESS FOR TREATING WASTEWATER - An apparatus for treating wastewater is provided, which comprises a biological reaction tank and a membrane separation device. The membrane separation device is provided outside the biological reaction tank. A mixing device is provided inside the biological reaction tank and an aeration device is provided inside the membrane separation device or inside a container for loading the membrane separation device. The biological reaction tank is connected to the membrane separation device or the container for loading the membrane separation device through a pipeline. A process using the apparatus for treating wastewater is also provided.03-24-2011
20120118820Septic System with Pressure Gradient Transport - Septic system design, installation, maintenance and use are described and provided. In embodiments, design, installation, and maintenance of pressure gradients in a septic system serve to transport treatment tank gases, or other gases, downstream, towards or into a leach field, bio-filter, drain field, or other environment. Such transport may promote the displacement of gases or the remediation of gases.05-17-2012
20100264082SUSPENDED MEDIA GRANULAR ACTIVATED CARBON MEMBRANE BIOLOGICAL REACTOR SYSTEM AND PROCESS - A system and process for treating an industrial wastewater stream is provided using a membrane biological reactor in which granular activated carbon material is introduced into an aeration portion and maintained upstream of a membrane operating system. The size of the granules of activated carbon is selected so that they can be screened or otherwise readily separated from the mixed liquor stream before the mixed liquor enters the membrane operating system tank(s) containing the submerged membranes, thereby preventing abrasion of the membrane by the carbon granules. The aeration portion includes a waste discharge port whereby a portion of spent granular activated carbon can be removed when the effluent concentration of chemical oxygen demand compounds approaches limits typically set by governmental agencies, and replaced by addition of fresh or regenerated granular activated carbon having greater adsorbent capacity.10-21-2010
20090127191PROCESS FOR TREATING A SOLID-LIQUID MIXTURE - A process is disclosed for treating a mixture of a solid and a liquid, the mixture including a contaminant. The process comprises the step of subjecting the mixture to cavitation wherein at least a portion of the contaminant is chemically decomposed. The process subsequently comprises the step of introducing a pre-determined biological species into the treated mixture to give a desired biological outcome, such as a biodegradation treatment, remediation or decomposition of the contaminant. Such a dual process can reduce the concentration of a contaminant to extremely low levels as well as achieve outcomes that the introduction of a biological species alone is not able to achieve.05-21-2009
20120312745MIXING SYSTEMS AND METHODS OF MIXING - A system for mixing and mixing processes and structures are disclosed. In addition a nozzle used for mixing is disclosed.12-13-2012
20110163028Biofilm Reactor Containing Spiral Structure and Water Treatment Device Using the Same - The present invention provides a biofilm reactor comprising a spiral structure and a water treatment facility using the same. The biofilm reactor comprises an inlet pipe for supplying water, an air supply pipe for supplying air, and an outlet pipe for discharging the water and air that passed through the reactor, wherein the reactor is provided therein with a spiral structure for forming a spiral bubble flow passage from the air supply pipe to the outlet pipe such that the oxygen transfer rate is increased by inducing the flow of bubbles supplied from the air supply pipe and by increasing residence time of the bubbles. The biofilm reactor is advantageous in that microbes adhere to the spiral structure to form a biofilm on the spiral structure, thus realizing both microbe suspension growth and microbe adhesion growth conditions, and in that the concentration of dissolved oxygen in water can be effectively increased without using power to stir, and the concentration of microbes can be effectively increased and maintained.07-07-2011
20110100908Waste Water Treatment - In the treatment of domestic and municipal waste water environmental pollutants, such as ammonia, oxides of nitrogen, organic matter which gives rise to what is known as chemical oxygen demand (COD) [and biological oxygen demand (BOD)], and solid matter, should be removed from the waste water In a typical treatment process the waste water is treated to remove ammonia, firstly by nitrification—the biological oxidation of ammonia (NH05-05-2011
20120152836PROCESS TO PRODUCE BIOFUELS FROM BIOMASS - Biofuels can be produced by: (i) providing a biomass containing celluloses, hemicelluloses, lignin, nitrogen compounds and sulfur compounds; (ii) removing sulfur compounds and nitrogen compounds from the biomass by contacting the biomass with a digestive solvent to form a pretreated biomass containing carbohydrates and having less than 35% of the sulfur content and less than 35% of the nitrogen content of untreated biomass on a dry mass basis; (iii) contacting the pretreated biomass directly with hydrogen in the presence of a hydrogenolysis catalyst to form a plurality of oxygenated intermediates, and (vi) processing at least a portion of the oxygenated intermediates to form a liquid fuel.06-21-2012
20120152835FUEL CELL DEVICES FOR USE IN WATER TREATMENT AND RECLAMATION PROCESSES - In some aspects, the disclosure provides methods and materials for generating electrical energy from wastewater treatment materials. For example, the methods involve selecting a pair of materials from a wastewater treatment facility and forming a microbial fuel cell using the pair of materials as anode and cathode materials. There are provided various configurations suitable for adaptation to existing wastewater treatment facilities, as well as design parameters for new wastewater treatment facilities, devices, or schemes that take advantage of the methods of the disclosure.06-21-2012
20100096324SYSTEM AND METHOD FOR REDUCING POLLUTION IN A BODY OF WATER - A system and method reducing pollution in a body of water using biological processes is provided. The system includes a hydraulic dam generated by an induced downwelling of effluent water from a plurality of water circulating devices. A series of linearly arranged treatment sub-systems are disposed upstream of the hydraulic dam. The treatment sub-systems include a water sterilization sub-system for neutralizing harmful and undesirable micro-organisms using an ultrasonic energy generating unit. The ultrasonic energy generated, is of a frequency that disrupts cellular structures in targeted micro-organisms.04-22-2010
20120160768ORGANIC-WASTEWATER TREATMENT METHOD AND ORGANIC-WASTEWATER TREATMENT APPARATUS - By adding an iron salt, the sedimentation property, the concentration property, and the filtration property of sludge in an activated-sludge mixed liquor in a biological treatment tank are effectively improved and treated water of high quality is efficiently provided. When an iron salt such as ferrous chloride, ferric chloride, or polyferric sulfate is added to organic wastewater and the organic wastewater is biologically treated, the iron salt is added to the organic wastewater and mixing is conducted; and the water mixture is mixed with activated sludge and biologically treated. By mixing organic wastewater and an iron salt at a pH close to an optimum pH for ferric hydroxide in advance, the turbidity of the treated water due to the formation of iron oxide or ferrous carbonate is suppressed.06-28-2012
20120223012WASTE SLUDGE DIGESTION PROCESS BY SEQUENTIAL INTERMITTENT OZONE DOSING - This invention is developed by including the intermittent sequential ozonation process to the commonly employed aerobic biological sludge digestion process, which is used for reducing the amounts of by-product waste sludge produced in treatment plants; thereby stabilizing the sludge in a shorter period and at a lower cost, as compared to the state of the art of the technique. With the intermittent sequential ozonation process used for sludge digestion, ozone is applied to the waste sludge intermittently and not continuously. Following the ozone application, sludge is aerated in the aerobic digester by one doubling time and at the end of this period it is re-ozonated. The COD, released following disintegration of the floc structures by ozone application, is re-consumed by bacteria both completing sludge digestion and carbon removal. Over 80% reductions in sludge amount have been achieved by dosing different amounts of ozone with respect to the changing sludge concentrations. Although normal aerobic digestion takes 15-30 days to complete, in intermittent ozone dosing process digestion is completed in very short periods such as 4 days. Due to stabilized and sterilized condition of the sludge and its high concentration of phosphorus, digested sludge may be used as soil fertilizer.09-06-2012
20100012582METHOD AND APPARATUS FOR BIOLOGICAL WASTEWATER PURIFICATION - The known activated sludge processes have several disadvantages. With the conventional sludge processes only a limited high dry matter content TS01-21-2010
20130228512High Performance Nitrifying Sludge for High Ammonium Concentration and Low Temperature Wastewater Treatment - Compositions of bacteria which are effective for the nitrification of wastewater, particularly at low temperatures, are described. The compositions are comprised of 35 strains or populations of at least partially characterized isolated bacteria. These compositions may be used to treat wastewater contaminated with animal fecal waste and/or ammonia. In use, wastewater is contacted with the bacterial composition of the invention under aerobic conditions and for a period of time effective to oxidize ammonia therein.09-05-2013
20120325741Systems and Methods for Wastewater Treatment - Disclosed is a system and method for treating wastewater. The system includes a bioreactor which defines a basin for receiving wastewater to be treated; a membrane module in fluid communication with the bioreactor; and a dissolution tank. The tank includes a pressure vessel that contains a portion of the wastewater to be treated and provides a regulated, pressurized gas head space above the wastewater. The tank also includes at least one liquid spray nozzle that permits passage of the wastewater into the gas head space of the pressure vessel and an outlet for discharging the wastewater having a desired gas concentration from the pressure vessel. The system also includes a pumping mechanism for supplying the wastewater to the spray nozzle of the tank such that fluid droplets are formed in the gas head space and the gas contained within the pressurized head space is dissolved into the wastewater.12-27-2012
20130015127Method of Wastewater Treatment and Apparatus for its Realization in Sequencing Batch ReactorsAANM Topol; JanAACI PragueAACO CZAAGP Topol; Jan Prague CZ - The method of wastewater treatment and the method-applying apparatus in the sequencing batch reactors, where after separating the activated sludge from the treated water the treated water is drawn off via a decanting apparatus from the sub-surface layer of water in the reactor. The decanted water is conveyed by the decanting apparatus to a separate tank, which is separated in a watertight way from the inside of the reactor. The treated water is pumped off from the separate tank to the outlet by the air-lift pump, the inlet of which is located at the level corresponding to the delivery yield of the air-lift pump. The submerged inlet part of the decanting apparatus moves vertically alongside with the fluctuating water level in the reactor.01-17-2013
20080223782Pressurized Biological Waste Water Purification Process - There is provided a reaction system capable of, in the feeding of liquid stored after gas-liquid mixing into waste water to be treated of a reaction tank, conditioning the interior of the reaction tank to a pressurized state so as to simultaneously accomplish enhancement of utilization efficiency of gas phase and further reduction of the amount of excess sludge generated. There is further provided a biological purification process characterized in that microorganisms fulfill purification activity in a pressurized reaction tank having a pressure other than deep water pressure applied thereto. Preferably, together with water to be treated, reactant gas such as pure oxygen, ozone-containing oxygen (ozonized oxygen) or air is fed into the pressurized reaction tank. With respect to gas and liquid fed into the reaction tank, preferably, reactant gas is fed in the form of dissolved gas or microbubbles by means of a gas-liquid mixing unit (line atomizer). Preferably, the pressurized reaction tank is fitted with a support for microorganisms as means for increasing the habitant density of microorganisms engaging in reaction and retaining such microorganisms.09-18-2008
20130134092WASTEWATER TREATMENT APPARATUS TO ACHIEVE CLASS B BIOSOLIDS USING CHLORINE DIOXIDE - Disclosed herein are systems and processes for treating a Waste Stream comprising biosolids, the Waste Stream provided at varying flow rates and solids concentrations so as to achieve an SOUR of 1.5 mg O05-30-2013
20130153494METHODS AND APPARATUSES FOR WATER AND WASTEWATER TREATMENT - Described herein are methods and devices for biologically treating water and/or wastewater. The methods and devices for treating waste water may be enhanced using an air-lift device which moves water and/or solids using volumes of air. This device can provide occasional surges of water using large bubbles which are able to move great volume of liquid while minimizing dissolved oxygen transfer to the surrounding liquid. Use of the devices and processes herein provides a simple, eloquent approach to waste water treatment with less operation and maintenance costs than conventional devices and/or processes.06-20-2013
20120085705Wastewater chemical/biological treatment method for open water discharge - A wastewater treatment method employing chemicals for disinfection, and precipitation of suspended solids, heavy metals and phosphates before subsequent aerobic bacterial biological treatment using 04-12-2012
210621000 Recirculating to prior step 23
20080223783HIGH PERFORMANCE, ENERGY EFFICIENT SYSTEM AND 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 system continuously to the aerobic membrane bioreactor. Further, a process is provided for treating wastewater including the step of wasting a volume fraction of organic cell mass from an aerobic membrane bioreactor to an anaerobic digester system and maintaining a solids retention time (SRT) in the bioreactor that is (1) greater than a time needed to achieve growth of organisms suitable for converting carbonaceous biochemical oxygen demand (CBOD) into cell mass and (2) less than a time at which substantial decay of the organisms occurs. The system and process may further include optional pretreatment and/or phosphorus and/or nitrogen removal downstream of the membrane bioreactor system.09-18-2008
210622000 Of separated liquid 2
20100264083METHOD AND APPARATUS FOR TREATING WASTE ACTIVATED SLUDGE - In an activated sludge process for treating wastewater, waste activated sludge is directed to a digester and subjected to sequential aerobic, anoxic and anaerobic treatment. Internal recycling of sludge may be carried out. The oxidation reduction potential during the anoxic and anaerobic cycles is carefully managed so that there is a significant reduction in the quantity of sludge that must be disposed of.10-21-2010
20100300966SYSTEMS FOR TREATMENT OF WASTEWATER - Systems and methods to treat wastewater are described herein. A wastewater treatment system may include a primary treatment system, a secondary treatment system, a disinfection treatment system, a solids treatment system, one or more fluid treatment systems, or combinations thereof.12-02-2010
210623000 Of sludge or separated solid 20
20090206033Method for Treating Milbemycin Compounds and Avermectin Compounds with Active Sludge - The present invention provides a method for treating industrial wastewater containing milbemycin compounds or avermectin compounds such as a culture filtrate generated after microbial production of milbemycins and avermectins efficiently, safety and at low running costs. This method removes milbemycin compounds or avermectin compounds by treating industrial wastewater containing at least one compound selected from the group consisting of milbemycin compounds and avermectin compounds with active sludge.08-20-2009
210625000 Treating outside mainstream 1
20120175302APPARATUS AND METHODS FOR CONTROL OF WASTE TREATMENT PROCESSES - 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, for the formation or precipitation of certain biological nutrients, or to accomplish solids formation reduction in a post-treatment process. These bacteria may be grown from specialized mixes of activated sludge and waste influent by exposing these materials to controlled environments (e.g., in an off-line treatment area). They may then be returned to the main process to perform certain tasks such as converting particulate cBOD into soluble cBOD for utilization, to reduce high solids yield organisms by supplementing the population characteristics with low yield organism characteristics, to provide biological nutrients or oxygenation assistance, to improve nitrification/denitrification efficiency, or to disfavor filamentous biology such as 07-12-2012
210626000 To mainstream oxygenation (e.g., activated sludge, etc.) 18
20110198284METHOD FOR THE TREATMENT OF WASTEWATER CONTAINING AMMONIA - A method for treating wastewater containing ammonium in a de-ammonifying activated-sludge system includes converting a portion of the ammonium into nitrite using aerobically oxidizing bacteria and converting another portion of the ammonium and the nitrite into elementary nitrogen using anaerobically oxidizing bacteria so as to generate a surplus sludge. The surplus sludge is removed from the waste water and separated into a heavy phase including primarily anaerobic ammonium-oxidizing bacteria and a light phase. The heavy phase is collected and/or returned to the system.08-18-2011
20110198283MEMBRANE CLEANING WITH PULSED AIRLIFT PUMP - A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (08-18-2011
20110139714PROCESS FOR REDUCING BULKING SLUDGE IN ACTIVATED SLUDGE WASTEWATER TREATMENT - The present invention pertains to a process for reducing the bulking sludge in an activated sludge plant for wastewater treatment wherein an iron(ll) or iron(lll) salt and at least one fatty amine or fatty amine derivative are used, and to compositions comprising the iron(ll) or iron(lll) salt and one or more fatty amines and/or fatty amine derivatives.06-16-2011
20100213123Ballasted sequencing batch reactor system and method for treating wastewater - A ballasted sequencing batch reactor system for treating wastewater including one or more sequencing batch reactors. A weighting agent impregnation subsystem is configured to mix biological flocs and weighting agent to form weighted biological flocs. A weighting agent recovery subsystem is configured to recover weighting agent from the weighted biological flocs and reintroduce the recovered weighting agent to the weighting agent impregnation subsystem.08-26-2010
20100133179SYSTEM AND METHOD FOR TREATING WASTEWATER CONTAINING AMMONIA - Treatment system for wastewater containing ammonium is provided. The treatment system of the present invention includes an ammonia oxidation reactor and a membrane reactor disposed on the back of the ammonia oxidation reactor. The ammonia oxidation reactor includes biological carriers for carrying the ammonium oxidation bacteria and nitrite oxidation bacteria, a pH level controller for increasing the pH level to above 7.5, and a DO (dissolved oxygen) controller for reducing the DO content to less than 1.0 mg/L. The membrane reactor composed of a membrane and an aerator is used to separate the solids and liquids of the effluent of the ammonia oxidation reactor. In addition, a method for treating wastewater containing ammonium is also provided.06-03-2010
20090250395Wastewater Treatment System - Wastewater treatment systems are disclosed with improved aeration tanks. The improved aeration tank includes an inverted frusto-conical clarifier and a submersible aerator pump disposed between the bottom of the aeration tank and the interior of the clarifier. The aerator pump is connected to an air inlet line that can pass downward through the clarifier and a plurality of bubble outlet lines that extend outward from the pump both radially and tangentially towards the sidewall of the aeration tank. As a result, bubbles rise upward through the aeration space disposed outside of the clarifier and around the aeration space or around the clarifier for improved mixing. The system may also include additional tanks such as a pretreatment tank and pump tank which are designed with baffled sidewalls for anchoring purposes. The vertical slopes of the sidewalls of the pretreatment and pump tanks are of the same magnitude but opposite to the vertical slope of the sidewall of the aeration tank thereby enabling the sidewalls of the pretreatment and aeration tank to nest together and the sidewalls of the pump and aeration tank to nest together. Methods of retrofitting existing water treatment systems and methods of treating wastewater are also disclosed.10-08-2009
20110089108Aeration and filtration system and process for treating wastewater - An aeration and filtration system and process for treating wastewater is described, the system having an ejector able to mix gas and liquid, an oxidation tank able to contain a solution of wastewater and biological sludge, a filtration means, a pipe able to convey the wastewater and biological sludge solution from the oxidation tank to the filtration means. The pipe is connected to the ejector so as to introduce a turbulence inside the pipe; moreover the filtration means is equipped with a membrane which has micropores.04-21-2011
20090166288WASTE-ACTIVATED SLUDGE TREATMENT METHODS AND APPARATUS - A method for treating waste-activated sludge comprises adding (07-02-2009
20120228217METHOD AND APPARATUS FOR SLUGE TREATMENT AND USE THEREOF IN SEWAGE BIOTREATMENT - The present invention provides a method for sludge treatment, comprising the following steps: (09-13-2012
20120261337SYSTEM AND METHOD FOR WASTEWATER TREATMENT - The present invention is directed to a system and method which recycles waste so that the effluent coming out of the system actually equals a potable water standard with essentially no contaminated sludge. In one embodiment, the solids in wastewater are subjected to aeration and enzymes in a digester for a period of time. The cleanest portion of the water from the digester is then clarified. Sludge, as well as scum, from the clarifier is vacuumed back to the digester. Clear water from the clarifier is delivered to a Recycling stage for filtering to remove suspended solids down to 5-microns. When the recycling process housing reaches saturation, a back-flushing process with clean water sends all of the captured suspended solids back into the Digester. The effluent, other than during back-flushing, from the Recycler is then passed through: 10-18-2012
20080251453Aerating Wastewater for Re-Use - A method and apparatus for aerating a liquid, particularly for aerating water in a wastewater treatment process, by: introducing the liquid into a primary pressurizable aeration tank; pumping liquid from the primary pressurizable aeration tank into a secondary pressurizable aeration chamber via a feed path; aerating the liquid in the secondary pressurizable aeration chamber; and recirculating aerated liquid from the secondary pressurizable aeration chamber back to the primary pressurizable aeration tank via a return path. The return path has a cross-sectional area smaller than that of the feed path through which the liquid is pumped into the secondary pressurizable aeration chamber such as to pressurize the secondary pressurizable aeration chamber to a pressure greater than that in the primary pressurizable aeration tank, and thereby (a) to enhance the aeration of the liquid in the secondary pressurizable aeration chamber, and (b) to supply the energy for recirculating the aerated liquid back to the primary pressurizable aeration tank.10-16-2008
210627000 Utilizing specific oxidant, other than air alone (e.g., oxygen-enriched air, ozone, peroxide, etc.) 5
20090184050Systems and Methods for Watercraft Having Marine Environment Enhancement Capability - Systems and methods for watercraft and marine propulsions systems having marine environment enhancement capabilities are disclosed.07-23-2009
20090050562METHOD FOR ACTIVATED SLUDGE WASTEWATER TREATMENT WITH HIGH DISSOLVED OXYGEN LEVELS - An activated sludge wastewater treatment method is provided. The disclosed method includes: receiving a stream of wastewater into a mixed liquor in an uncovered activated sludge basin; introducing high purity oxygen to the mixed liquor in the activated sludge basin to produce euoxic conditions (i.e. a dissolved oxygen level in the range of between about 5 mg to 15 mg) in the activated sludge basin; passing a portion of the mixed liquor in the activated sludge basin through a clarifier to separate activated sludge and produce an effluent stream and an activated sludge stream; and recycling a portion of the activated sludge stream to the activated sludge basin to produce a mixed liquor having a solids loading of between about 3000 mg and about 10000 mg of suspended solids per liter of mixed liquor and a solids retention time of between about 7 days and 40 days.02-26-2009
20100147764SYSTEM AND PROCESS FOR WATER TREATMENT - A method for removing contaminant from feedwater by forming a dispersion comprising bubbles of a treatment gas in a continuous phase comprising feedwater, wherein the bubbles have a mean diameter of less than about 5 μm and wherein the treatment gas is selected from the group consisting of air, oxygen, and chlorine. A method for removing contaminants from a feedwater by subjecting a fluid mixture comprising feedwater and a treatment gas to a shear rate greater than 20,000 s06-17-2010
20090001017SYSTEM AND PROCESS FOR WATER TREATMENT - A method for removing contaminant from feedwater by forming a dispersion comprising bubbles of a treatment gas in a continuous phase comprising feedwater, wherein the bubbles have a mean diameter of less than about 5 μm and wherein the treatment gas is selected from air, oxygen, and chlorine. A method for removing contaminants from a feedwater by subjecting a fluid mixture comprising feedwater and a treatment gas to a shear rate greater than 20,000 s01-01-2009
20090114592METHOD FOR PURIFYING WASTE WATER WITH ADDED OXIDIZING AGENT - The invention concerns a method for purifying wastewater loaded with organic matter, said method including: a step of contacting wastewater with a biological culture containing a purifying biomass and a step of separating performed by filtration through organic or inorganic membranes. The invention is characterized in that at least part of the biological culture is subjected to an oxidative stress step enabling a liquor to be obtained by the action of at least one oxidizing agent used in small amount so as to preserve the biological activity of the purifying biomass while modifying the microbial floc to make it denser.05-07-2009
210628000 Utilizing mechanical aeration means 2
20110180475 Process for Treating Wastewater - The present invention relates to a process for treating wastewater. The process includes the steps of (a) mixing different constituents of said wastewater inside a container, (b) withdrawing said wastewater from container, (c) feeding said wastewater to a bioreactor, (d) contacting said wastewater with an isolated microorganism or an isolated microorganism consortium, (e) aerating a suspension of said wastewater with said isolated microorganism or said isolated microorganism consortium, (f) withdrawing said suspension of said wastewater with said isolated microorganism or said isolated microorganism consortium from said bioreactor, (g) filtering receiving flow from step (f) to separate a concentrate stream from a permeate stream, (h) returning said concentrate stream to said bioreactor and (i) removing permeate stream.07-28-2011
20090166289Apparatus and Method for Atomizing a Liquid - A trumpet-shaped slinger atomizes or aerosolizes liquid by lifting liquid from adjacent the surface of the liquid using helically oriented fins rotated by spinning the slinger on a shaft. The lifted liquid is centrifugally forced over an increasing surface area and ejected from an upper edge as droplets. When used in wastewater aeration, radial fan blades on top of the slinger break up foam and increase air circulation while the increased surface area of the droplets increases diffusion of dissolved gasses from the wastewater.07-02-2009
210629000 And internally circulating the liquid 9
20090152196ALTERING METABOLISM IN BIOLOGICAL PROCESSES - Compositions of peptides and surface-active agents are described, as are methods of making and using such compositions. The compositions are capable of affecting metabolic rates in biological systems, and to accelerate nutrient uptake without a concomitant increase in biofilm production.06-18-2009
20090314711PHOTOELECTROCATALYTIC OXIDIZER DEVICE HAVING COMPOSITE NANOPOROUS TiO2 COATED Ti PHOTOANODE AND METHOD OF REMOVING AMMONIA FROM WATER IN AQUARIA AND RECIRCULATION AQUACULTURE SYSTEMS - A photoelectrocatalytic oxidizing device having a photoanode being constructed from an anatase or rutile polymorph of Ti as the support electrode. Alternatively, the photoanode is a composite electrode comprising an anatase or rutile polymorph of Ti as the support electrode coated with a thin film of sintered nanoporous TiO12-24-2009
20100224556JET AERATION APPARATUS AND METHOD OF USING THE SAME - A jet aeration apparatus for aerating a membrane bioreactor has a jet aerator and an air supply pipe. The jet aerator is disposed in the membrane bioreactor and includes a water inlet, a pump disposed below a liquid surface of the membrane bioreactor, an air inlet pipe whose air inlet is disposed above the liquid surface of the membrane bioreactor, and a jet pipe having a jet nozzle. The air supply pipe includes a connector; and the connector of the air supply pipe is connected to the jet nozzle of the jet pipe of the jet aerator. A method of using the jet aeration apparatus is also provided. The jet aeration apparatus is easy to install, quiet in operation, and features a high degree of integration.09-09-2010
20080290026Method and Apparatus for Aeration of Liquid Medium - An apparatus and method for mixing gas and liquid comprising a dome, lower housing, aerator device and flotation device, wherein intermeshed rotating sets of discs operate on parallel shafts driven by variable speed drives, and strakes are radially mounted on the discs to carry liquid up into a mixing area and to carry air and liquid down into a mixing area resulting in a shear force that drives air into the oxygen depleted liquid. The dome and lower housing create an air tight space, wherein the barometric pressure is raised by a blower, in order to pop foam bubbles and allow for optimum mixing of air into the oxygen depleted liquid, and intake and discharge openings of the lower housing are positioned beneath the liquid line, thereby preventing the escape of foam, noise and odorous gases into the local environment.11-27-2008
20090211972METHOD AND APPARATUS FOR SIMULTANEOUS CLARIFICATION AND ENDOGENOUS POST DENITIFRICATION - A method for treatment of nitrified wastewater, the method including supplying wastewater to be treated to a tank having a layer of biomass supporting media near or at the top thereof, retaining biomass on and below the biomass supporting media for a sufficient time such that the biomass hydrolyses and supplies organic carbon to the wastewater in the tank; denitrifying and simultaneously clarifying the wastewater by providing an upward flow of the wastewater in the tank through the layer of biomass supporting media and discharging excess sludge from the bottom of the tank at a rate which is selected to maintain nitrate and ammonia concentrations below selected thresholds.08-27-2009
20100258501Sequencing Batch Aerated Lagoon - A sequencing batch lagoon process is carried out in a minimum of two earthen lagoons and provides the treatment of municipal or industrial wastewater. Each lagoon is operated on fill-draw basis in a sequencing manner. Raw wastewater continues entering into one of the lagoons while the other lagoon is at full liquid level. The lagoon at the full liquid level will begin to discharge when the other lagoon at filling mode is reaching the full liquid level. The lagoon at the drawdown mode continues until the liquid level is down to the lowest liquid level. The wastewater feeding is then alternated to the lagoon which is at the lowest liquid level. The lagoon at the full liquid level shall have no contamination from raw wastewater or the lagoon at the filling mode. The biological reactions occur under aerobic and anoxic conditions. The aerobic conditions occur in the liquid or above the bottom sludge while the anoxic conditions occur near or within the bottom sludge. Air is provided by surface mechanical aerators or diffused aeration system. The aeration system is shut down during the discharge mode and is turned back on during the filling mode. Sludge in the lagoon is not wasted during the operation of sequencing batch lagoon process. The capacity of each lagoon depends on the number of lagoons.10-14-2010
20120118821Process for treatment of wastewater with a modular biological fluidized bed reactor system - A biological wastewater treatment process and modular apparatus wherein activated sludge is recirculated in all of aeration, fluidized bed and return sludge phases in the apparatus.05-17-2012
20130015128BIOLOGICAL WASTE DIGESTER - An aerobic bacteria waste digester uses a rocking paddle to mix a waste fluid. A pair of spaced-apart inflatables engaged with the paddle and alternately inflated provide buoyancy forces to drive the rocking action. The paddle has two decks and a peripheral skirt. The paddle is of a trestle-type construction with light weight planks forming the decks. The position and motion of paddle surfaces and air bubbled through the fluid from below, is able to enhance bacteria colony growth and thus the rate of bio-mass digestion.01-17-2013
20100176054METHOD FOR REMEDIATING SOLIDS IN WASTE LIFTING STATIONS - A process removes or eliminates altogether accumulations of solid and semi-solid, water immiscible materials adhering to walls, and equipment, particularly near the high liquid mark, in tanks of waste liquid lift stations. Compressed gas is used to generate large bubble masses of six inches to several feet in diameter within the waste liquid. As these large bubble masses rise through the liquid in the tank, convection currents generated by the rising bubbles agitate and loosen pieces of accumulations adhering to the tank and lift station equipment, resulting in a slurry of waste liquid and immiscible materials which can then be pumped from the tank by lift station equipment for further processing. In some embodiments, continuous or frequent periodic generation of the large bubble masses prevents the accumulation of such materials altogether. In some embodiments, wastewater aeration is also provided, which, in combination with biological augmentation, further enhances the effectiveness of accumulated material removal.07-15-2010
210630000 And anaerobic treatment 12
20090242482METHOD OF BIOFILTRATION OF A LIQUID EFFLUENT - A method of biofiltration of a liquid effluent by simultaneous nitrification and denitrification uses the adding of an oxygen source at a predetermined rate and optionally the adding of a carbon source (such as whey) thus enabling the complete transformation of the nitrates (NO10-01-2009
20090272690Method for the Treatment of Ammonia-Containing Waste Water - A method for treating ammonium-containing waste water by means of a single sludge system in an SBR reactor, in which ammonium is converted to nitrite in a first reaction and ammonium and nitrite are converted into molecular nitrogen in a second reaction carried out in parallel, the oxygen concentration in the reactor being maintained at a low level. A robust process is achieved by providing that the pH-value of the system is controlled and kept at a target value by controlled intermittent aeration, the fluctuation range of the pH-value amounting to 0.05 at most, and preferably 0.02 at most, and the O2-concentration being kept between 0.2 mg/l and 0.4 mg/l, and preferably between 0.25 mg/l and 0.35 mg/l.11-05-2009
20090236283Method of Denitrifying Wastewater - Disclosed is a method of denitrifying a solution including introducing into the solution an amount of a carbon source within a duration and at a frequency so that indigenous heterotrophic bacteria deplete dissolved oxygen in the solution and obtain oxygen from nitrate in the solution. Related apparatuses and compounds also are disclosed.09-24-2009
20130213883TREATMENT OF MUNICIPAL WASTEWATER WITH ANAEROBIC DIGESTION - Low strength wastewater such as municipal sewage is treated using an anaerobic digester. In some examples, a wastewater stream is separated into a solids rich portion and a solids lean portion. The solids lean portion is treated, for example to remove nitrogen. The solids rich portion is treated in an anaerobic digester, preferably with influent or recuperative thickening. In another example, the wastewater stream is fed to an anaerobic digester and solid-liquid separation stages downstream of the di-gester return active bacteria and undigested organics to the digester. Both cases may use a process train comprising treatment in an anoxic tank followed by a nitritation tank with a portion of the effluent from the nitritation tank recirculated to the anoxic tank to provide nitritation and denitritation.08-22-2013
20090032460WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT EQUIPMENT - In a micronanobubble reaction vessel 02-05-2009
20110186510SYSTEMS AND METHODS FOR REDUCING SLUDGES PRODUCED BY WASTEWATER TREATMENT FACILITIES - The invention relates to methods and systems of improving sludge removal and maintaining effluent quality. The methods include directing an incoming wastewater stream to a treatment facility, the steam having a flow of at least 20,000 gallons per day; the incoming wastewater stream having at least 50 mg/L solids and 100 mg/L BOD; removing solids and BOD from the incoming wastewater stream in the treatment facility to provide a final effluent stream; the final effluent stream having less than 10% of the solids of the wastewater stream and less than 10% of the BOD of the wastewater stream; the removal of solids and BOD yielding less than about 0.25 pounds of secondary sludge per pound of BOD removed.08-04-2011
20120055871Electrolysis Method, and method and Plant for the Pretreatment of Raw Water - The invention relates to an electrolysis method that uses iron particles and an aqueous solution containing sodium hypochlorite. The method is characterised in that said method uses direct current, the iron particles form the anode (03-08-2012
20100288698METHOD FOR REMOVING PHOSPHORUS USING MEMBRANE BIOREACTOR - A method for removing phosphorus having steps of a) providing a membrane bioreactor having a membrane module having a lower part; b) aerating intensively the lower part of the membrane module while controlling dissolved oxygen concentration around the membrane module at more than 2 mg/L and dissolved oxygen concentration in the rest zone at less than 1 mg/L so as to form an aerobic zone, a facultative aerobic zone, and an anaerobic zone; and c) introducing sludge having a concentration of between 10,000 mg/L and 30,000 mg/L and having an organic loading of between 0.08 and 0.07 Kg (COD)/(Kg (MLSS)·d) into the membrane reactor so that phosphorus is absorbed in the aerobic zone, released in the facultative aerobic zone, and reduced by phosphine-reducing bacteria into phosphine. The method for removing phosphorus does not include discharging sludge. An apparatus employed for the process does not take up much additional space.11-18-2010
20110180476Novel Anammox Bacterium Isolate - Disclosed is an isolated bacterial strain 07-28-2011
20110120945Apparatus and Process for Wastewater Treatment and Biological Nutrient Removal in Activated Sludge Systems - An apparatus (05-26-2011
20080223784Method and Arrangement for Processing Nitrogen-Concentrated Effluents in a Sequential Fractionated Cycle Biological Reactor - The invention relates to a method for processing nitrogen-concentrated effluents by ammonia oxidation into nitrites followed by nitrite denitritation in a gaseous nitrogen in a sequential biological reactor (09-18-2008
20080217242Methods and Systems for Total Nitrogen Removal - A method and related apparatus for oxidation and reduction of a reduced aqueous nitrogen contaminant.09-11-2008

Patent applications in class Aerobic treatment

Patent applications in all subclasses Aerobic treatment