Class / Patent application number | Description | Number of patent applications / Date published |
210614000 | Controlling process in response to stream constituent or reactant concentration | 57 |
20080251451 | Method and Apparatus for the Aerobic Treatment of Waste - The invention provides a waste treatment apparatus for the microbial treatment of waste, and comprises at least one reactor vessel ( | 10-16-2008 |
20080314829 | Dynamic Control of Membrane Bioreactor System - A method of controlling the operating parameters of a membrane bioreactor system, the method including the steps of determining a control algorithm based on the relationship between the value of a parameter of the influent provided to the membrane bioreactor system and an optimal performance measurement parameter of the system and controlling one or more operating parameters of the membrane bioreactor system using the determined control algorithm. | 12-25-2008 |
20090230055 | Controlling wastewater treatment processes - Methods and apparatus for continuing, automated control of wastewater treatment processes. In certain preferred embodiments, method and apparatus for control of aeration in suspended growth biological treatment processes, especially in activated sludge processes. | 09-17-2009 |
20090230056 | Method of treating wastewater and wastewater treatment apparatus - A method of treating a wastewater, containing the steps of: filtering a wastewater supplied into an activated sludge tank and biologically-treated therein, in a membrane module installed outside the activated sludge tank; chemical-cleaning the membrane module with a membrane-cleaning agent while the membrane module is disconnected from the activated sludge tank with a valve; and water-flushing off the substances contained in the wastewater that react with the membrane-cleaning agent forming hazardous substances and/or operation-inhibiting substances, or the membrane-cleaning agent remaining in the membrane module with water while the membrane module and the activated sludge tank are disconnected from each other with the valve, wherein it is prevented the membrane-cleaning agent from contacting the substances contained in the wastewater that react with the membrane-cleaning agent forming hazardous substances and/or operation-inhibiting substances. | 09-17-2009 |
20090261037 | Biomass treatment of organic waste or water waste related application data - A method, system, apparatus and program for effecting the decomposition of organic waste material comprises: providing a treatment tank for decomposition of organic waste material, the treatment tank containing an active biomass comprising at least one bacteria that decomposes organic material; providing at least two inlets to the treatment tank, a first inlet comprising an inlet for organic material and a second inlet comprising an inlet for an aqueous stream; a processor that receives and stores information on: the status of chemical oxygen demand of the active biomass; and the oxygen provision capability of a first organic material that can be fed into the treatment tank through the first inlet; a mass flow control system controlled by the processor which feeds the at least one organic material through the first inlet at a rate based at least in part upon the status of chemical oxygen demand in the treatment tank as recognized by the processor. | 10-22-2009 |
20090272688 | Bioreactor and Method for the Biological Purification of Water - The invention relates to a bioreactor ( | 11-05-2009 |
20090301966 | Method and device for purifying wastewater - Wastewater can be purified in a device, which includes a cup-shaped vessel, having a wastewater inlet tube for the water at a certain level and an outlet tube at a lower level than the inlet tube, and a horizontal distribution disc, which vertically divides the vessel, has at least one opening and is provided with a substantially vertical distribution tube for receiving the water from the inlet tube. Water above the distribution disc is pumped through a filter head with a filter. Filtered water is let out through the outlet tube, whereas unfiltered water is transferred back to the distribution tube. Flocculation agent is added to the unfiltered water before reaching the distribution tube. | 12-10-2009 |
20090308809 | Wastewater treatment method - The present invention provides a method that allows solid-liquid separation of activated sludge and a treated liquid to be carried out stably and efficiently by suitably evaluating the risk of clogging prior to membrane clogging and adopting necessary and adequate countermeasures. The present invention provides a wastewater treatment method employing a membrane separation activated sludge process, by which the upper limit of BOD-sludge load is determined based on an index indicating the total organic content of the organic wastewater and a BOD value, and the BOD-sludge load in the activated sludge tank is adjusted so as not to exceed the upper limit. | 12-17-2009 |
20100065494 | Biological Water Treatment by Alternating Continuous and Sequential Aeration - A water treatment method using a biological reactor to break down the nitrogen-based pollution contained in said water, said reactor comprising a biomass aerated by aeration means, said treatment comprising simultaneous nitrification/denitrification phases, characterized in that said treatment implements two aeration modes: a continuous aeration mode; a sequential aeration mode in which the aeration interruption is triggered when the ammonia concentration reaches a low predetermined threshold while the aeration is activated when the ammonia concentration reaches a high predetermined threshold, the switching from one aeration mode to the other being activated according to the nitrate concentration in said water, said continuous aeration mode being activated when said nitrate concentration reaches a low predetermined threshold, and said sequential aeration mode being activated when said nitrate concentration reaches a high predetermined threshold. | 03-18-2010 |
20100126931 | METHOD AND DEVICE FOR PURIFYING LIQUID EFFLUENTS - The invention relates to a method and a device for purifying liquid effluents, in which water is separated from substances by performing, in a single vertical enclosure ( | 05-27-2010 |
20100155328 | SYSTEMS, METHODS AND COMPONENTS FOR WATER TREATMENT AND REMEDIATION - A modularizable system for residential water treatment having a low energy requirement to process water for reuse at the residence which results in a reduction in the amount of fossil fuels required to power large water processing stations and transfer water from water plants to individual residences is disclosed. The system increases availability of water at the residential level in areas where water is a limited or limiting resource (e.g., in arid climates). Furthermore, the amount of water a residence uses in a given cycle is more efficient. | 06-24-2010 |
20100176053 | MATERIALS FOR REMOVING CONTAMINANTS FROM FLUIDS USING SUPPORTS WITH BIOLOGICALLY-DERIVED FUNCTIONALIZED GROUPS AND METHODS OF FORMING AND USING THE SAME - A modified bioreactor support material having high surface area for removing a contaminant ( | 07-15-2010 |
20100187173 | METHODS OF PROVIDING AN AEROBIC MEDIUM IN A WASTEWATER TREATMENT BIOREACTOR COMPARTMENT AND RELATED SYSTEMS - The disclosure relates to methods and related systems for monitoring and controlling biological activity in municipal and industrial wastewater treatment systems. In particular, the disclosure relates to methods for controlling airflow in a bioreactor type, activated sludge wastewater treatment system by real-time monitoring of one or more parameters of the wastewater treatment system. | 07-29-2010 |
20100200500 | Bubble-Less Gas Delivery Into Liquid Systems - A system for saturating a liquid with a gas followed by bubble-less delivery and mixing of the gas-saturated liquid into a gas-unsaturated liquid wherein a biological process is occurring. The system comprises a gas-saturation unit which controllably communicates with a bioreactor unit containing a gas-unsaturated liquid wherein a biological process is occurring. The gas saturation unit comprises a sealable pressure-resistant vessel for receiving therein an unsaturated liquid and wherein the liquid is saturated with a gas under pressure. The rate of introduction of gas-saturated liquid into the bioreactor unit is controllable to make it equivalent to the rate of gas consumption by the biological process occurring in gas-unsaturated liquid contained within the bioreactor unit. The invention is particularly useful for bubble-less gas delivery to open and closed bioreactor configurations for wastewater treatment processes. | 08-12-2010 |
20100243565 | WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT APPARATUS - A nitrification carrier having made nitrifying bacteria dominant therein and a denitrification carrier having made anaerobic ammonium-oxidizing bacteria dominant therein are mixed in a treatment tank. Both of a nitrification reaction with the nitrification carrier and a denitrification reaction with denitrification carrier are allowed to proceed in the treatment tank to decompose ammonium nitrogen in wastewater to nitrogen gas. The ratio of the bacterial loads of the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria can be easily controlled by immobilizing the nitrifying bacteria and the anaerobic ammonium-oxidizing bacteria on different carriers from each other (nitrification carrier and denitrification carrier) and by controlling the volume ratio (ratio of the feeding amounts) of the nitrification carrier and the denitrification carrier. | 09-30-2010 |
20100252499 | DENITRIFICATION PROCESS AND SYSTEM - The disclosed process and system are used for the denitrification of wastewater. The system comprises: an influent concentration analyzer for measuring an influent dissolved oxygen concentration, an influent nitrate concentration, and an influent nitrite concentration; and a feed chemical controller for providing a feed chemical at a controlled rate. The feed chemical controller is responsive to one or more output signals provided by an automated control loop that accepts input signals from the influent concentration analyzer, which input signals relate to at least two of the influent nitrate concentration, the influent nitrite concentration, and the influent dissolved oxygen concentration | 10-07-2010 |
20100276363 | WASTEWATER TREATMENT PROCESS AND PLANT COMPRISING CONTROLLING THE DISSOLVED OXYGEN CONCENTRATION - The present invention relates to a process for treating wastewater that includes the steps of: —a contact step, wherein wastewater contacts bacteria retained on a support surface and the dissolved oxygen concentration of the wastewater is maintained at 2.0 mg/l or less; an aeration step, wherein gas is passed through wastewater that has passed through the contact step and the dissolved oxygen concentration of the wastewater is reduced as the wastewater passes through the aeration step; a sedimentation step, wherein wastewater that has passed through the aeration step is substantially separated into treated water and sludge; and a sludge recycling step, wherein sludge from the sedimentation step is passed to the contact step. The invention also relates to a processing unit on which the aforementioned process may be operated. | 11-04-2010 |
20100288697 | METHOD FOR FORMING FACULTATIVE-ORGANISM-ADAPTED MEMBRANE BIOREACTOR - A method for forming a facultative-organism-adapted membrane bioreactor by: providing a membrane bioreactor having a membrane module, aerating intensively the membrane module at a lower part thereof and maintaining the scouring against the membrane module so that an aerobic environment is formed at a middle and lower part of the membrane module, and controlling aeration intensity so that a facultative or anaerobic environment is formed around the membrane module excluding the middle and lower part thereof. The a facultative-organism-adapted membrane bioreactorformed by the method has low energy consumption, low sludge yield coefficient, and high efficiency of nitrogen and phosphorus removal. | 11-18-2010 |
20100326906 | INFILTRATION/INFLOW CONTROL FOR MEMBRANE BIOREACTOR - A method and system for wastewater treatment comprising a first treatment zone ( | 12-30-2010 |
20110005999 | RECYCLING AND TREATMENT PROCESS FOR PRODUCED AND USED FLOWBACK FRACTURING WATER - A portable water recycling and treatment system and process for used and produced flowback frac water pumps the water from a collection tank through a series of dedicated hydration, retention and filtering tanks and vessels that provide treatment for the removal of chemicals, sediments and other containments. The system, which is enclosed, can be readily assembled on-site by interconnecting the dedicated tanks, vessels and pumps. The tanks and vessels may be situated in a plurality of trailers/units that are transported separately to the site. | 01-13-2011 |
20110068056 | Method for the Biological Treatment of an Effluent and Associated Plant - The invention relates to a method for the biological treatment of an effluent to be treated and containing at least two forms of pollution, one of which is more easily biodegradable than the other, which comprises using a main biological treatment area in which the raw effluent is contacted with biological sludge adapted for consuming a first form of pollution that can be more easily degraded than a second form of pollution, wherein said method is characterised in that comprises collecting a fraction at least of the biological sludge which is isolated at a distance from the main biological treatment area in a so-called bioactivation area and under aeration and time conditions adapted for triggering in said fraction the development of new biological functions capable of consuming the second form of pollution, and further recycling at least a portion of said biological sludge fraction towards the main biological treatment area. | 03-24-2011 |
20110073545 | TREATMENT OF AQUEOUS LIQUID - Aqueous liquid having an oxygen demand flows into a treatment vessel where it is treated by suspended aerobic bacterial solids in the presence of dissolved oxygen. A pressurised flow of the treated liquid passes to a clarifying membrane separator effective to separate the flow into a discharge stream of clear liquid and a pressurised recycle stream concentrated in the aerobic bacterial solids. A first oxic gas is employed to scour the membranes and is conveyed away from the membrane separator in the pressurised recycle stream. The pressurised recycle stream is returned to under the surface of the liquid in the treatment vessel. A second oxic gas is introduced either into the pressurised recycle stream or into a further pressurised stream of aqueous liquid flowing into the same volume. The rate of introduction of the oxic gases is controlled with reference to the pH and dissolved oxygen concentration of the liquid in the vessel. | 03-31-2011 |
20120031837 | WASTEWATER TREATMENT - A system and method for treating wastewater by continuously flowing wastewater into a chemostat and continuously discharging clean water out of the chemostat. The system can include sensors and an electronic controller for on-line measuring ambient parameters in the chemostat and adjusting the chemostat's operating conditions accordingly. | 02-09-2012 |
20120061316 | BIOLOGICAL TREATMENT METHOD - The present invention provides a biological treatment method of biologically treating the subject water containing phenol, thiocyanate and the like, which improves the quality of treated water, while suppressing a reduction in treatment efficiency. As a means for achieving the aforementioned object, the present invention relates to a biological treatment method including introducing subject water containing a COD component, wherein the COD component is at least one of phenol and thiocyanate, into a biological treatment tank containing sludge containing bacteria capable of decomposing the COD component to thereby biologically treat the COD component with the bacteria, wherein, before the introduction of the subject water into the biological treatment tank, a step of counting the total number of bacteria contained in the sludge is carried out, so that the amount of the COD component loaded on a single bacterium per unit time can be controlled within a predetermined range. | 03-15-2012 |
20120085704 | SYSTEMS AND METHODS FOR AUTOMATED CONTROL OF MIXING AND AERATION IN TREATMENT PROCESSES - A system and method for automatically controlling aeration and mixing processes are disclosed. | 04-12-2012 |
20120160767 | ADDITIVE USED IN A MEMBRANE-SEPARATION ACTIVATED SLUDGE PROCESS - In order to provide a means that can process organic wastewater via a membrane-separation activated sludge process that is stable over a long period of time, by reducing the quantity of biological polymers that can cause permeability problems, an additive is provided that is added to the activated sludge when treating organic wastewater via a membrane-separation activated sludge process. Said additive contains microorganisms that decompose polysaccharides. | 06-28-2012 |
20120211417 | Method and System for Controlling Carbon Source Feed to Denitrification Filters - A process for optimizing the carbon feed in a denitrification filter. The process utilizes in-line or off-line measurements of process variables in combination with feed forward and feedback control and increases or decreases the amount of carbon added based on a calculated reset rate determined on a periodic basis. The calculated reset rate may be a percentage of a theoretical value of the necessary carbon feed rate needed to remove the desired amount of nitrate-nitrogen. When the effluent nitrate-nitrogen is at a desired level and no rate change is necessary, the carbon feed rate is set to an average of one or more of the last filter runs. The process may also include a step wherein the carbon addition is increased immediately after backwashing to reestablish the biomass needed to produce the desired effluent in a step to regain process efficiency once that boost reestablishes the biomass. | 08-23-2012 |
20120261334 | METHODS AND APPARATUS FOR STRUVITE RECOVERY USING UPSTREAM CO2 INJECTION - Formation of scale in a wastewater treatment system upstream of a struvite precipitation reactor is inhibited by injection of CO | 10-18-2012 |
20120261335 | Method for Treating Water Within a Sequential Biological Reactor Including an In-Line Measurement of the Nitrite Concentration Inside Said Reactor - The invention relates to a method for treating water laden with nitrogen in the form of ammonium by means of nitritation-denitritation, wherein said method includes at least: a first step (i) of supplying at least one sequential biological reactor ( | 10-18-2012 |
20120292251 | METHOD AND APPARATUS FOR MONITORING BIOLOGICAL ACTIVITY AND CONTROLLING AERATION IN AN ACTIVATED SLUDGE PLANT - A method and apparatus for operating an activated sludge plant having a plurality of tandem aeration zones, each receiving mixed liquor from an upstream zone or an upstream source and discharging a mixed liquor to a downstream zone or a downstream process includes a control which determines a parameter at a downstream one of the zones. The parameter is representative of a concentration of ammonia in the mixed liquor in the downstream one of the zones and may be used to control at least one upstream zone. A value of airflow to one of the zones may be determined and used to determine a demand for dissolved oxygen in the mixed liquor in that zone as a function of airflow to that zone. An elevated level of demand may be used to indicate a dump of commercial waste having a high BOD demand. A depressed level of demand may be used to indicate the presence of chemicals that inhibit bacterial respiration. | 11-22-2012 |
20120325739 | SYSTEM AND METHOD FOR CONVERTING ORGANIC WASTE INTO METHANE AND OTHER USEFUL PRODUCTS - An organic waste processing system and method for producing a slurry for the production of bio-gas, transportation fuels and chemical products, and a residual sad. The system includes (i) a hopper configured to receive sorted organic waste having contaminants from one or more sources, (ii) a separator system in communication with the hopper and configured to receive the sorted organic waste from the hopper and to remove at least a portion of the contaminants in the sorted organic waste, (iii) a complimentary liquid tank in communication with the separator system and containing complimentary liquids, (iv) a wash water liquid tank in communication with the separator system and containing wash water, (v) a product tank in communication with the separator system and configured to receive the sorted organic waste from the separator system, (vi) a make-up product tank in communication with the separator system and configured to receive the sorted organic waste from the separator system having low COD, (vii) a anaerobic digester system configured to receive the sorted organic waste from the product tank, and (viii) a programmable logic controller. | 12-27-2012 |
20130020256 | Method for improving wastewater treatment in structures containing concentrated populations of individuals - The instant invention describes a method of treating wastewater generated from structures containing concentrated numbers of individuals prior to the wastewater entering a municipality's sewer system. The method involves delivering bacterial formulation to an area that has access to the main pipes responsible for delivering the structure's wastewater to the municipality's sewer system whereby such bacteria establish a biofilm which treats the wastewater generated by the occupants of the structure as the wastewater is transported to the city's main sewer system. | 01-24-2013 |
20130020257 | Mainstream Wastewater Treatment - One or more embodiments of the present invention relate to a short cut or shortened method for the removal of nitrogen from wastewater by pairing an aerobic fixed-film biological reactor with an anoxic fixed-film biological reactor under unique operating conditions. | 01-24-2013 |
20130146534 | METHOD AND SYSTEM FOR RELEASING NITROGEN FROM FILTER MEDIA - A method and system for removing nitrogen from a downflow denitrification media filter which optimizes the bump timing increasing productivity. The method comprises measuring the influent and effluent nitrate concentrations and determining total nitrate-nitrogen accumulation. A bump of the filter is initiated based on a comparison of the total nitrate-nitrogen accumulation with a predetermined accumulated nitrate-nitrogen value. The method may utilize a processor, having a memory, which is capable of communicating with, receiving input from and sending output to, and controlling the filter and any in-line measurement tools. The method may include a bump timing factor to adjust the bump interval when the actual operating conditions are substantially different from the operating conditions that were present when the predetermined accumulated nitrate-nitrogen value was determined. A method for predicting the bump interval and determination of an estimated time until the next bump are also included. | 06-13-2013 |
20130146535 | METHOD FOR MONITORING AND/OR CONTROLLING THE PROCESS FLOW OF A WASTE WATER SYSTEM AND SYSTEM FOR PERFORMING THE METHOD - A method for monitoring and/or controlling the process flow of a waste water system having waste water in waste water lines, comprising the steps as follows: measuring volume flow of waste water at a location remote from a waste water cleaning plant; measuring at least one additional waste water relevant parameter at the location remote from the waste water cleaning plant; evaluating the measurement data and detecting system relevant events; and undertaking measures in the waste water cleaning plant and/or at the location remote from the waste water cleaning plant as a function of the system relevant event. Furthermore, the invention relates to a system for performing the method. | 06-13-2013 |
20130193067 | SYSTEMS AND METHODS FOR ANAEROBIC DIGESTION OF BIOMATERIALS - Systems and methods for performing anaerobic digestion of biomaterials using a clarifier, a batch reactor, and/or a digester are disclosed. The clarifier performs pretreatment processing of biomaterial to improve anaerobic digestion. The batch reactor and/or the digester are coupled to the clarifier and are configured to digest the processed biomaterial. A control system for an anaerobic digestion process includes a flow control system, a temperature control system, and a totalization system. The flow control system controls the flow of biomaterial and the delivery of chemical agents to the biomaterial based on conductivity, temperature, pressure, and/or composition of the biomaterial. The temperature control system includes a heat source and heat exchangers that control the temperature of the biomaterial. The totalization system senses the volume of biomaterial in at least one stage of an anaerobic digestion process and a controller controls the flow control system based upon the sensed volume of biomaterial. | 08-01-2013 |
20130199997 | Method of Treating Municipal Wastewater and Producing Biomass with Biopolymer Production Potential - A method of biologically treating wastewater and removing contaminants from the wastewater is disclosed. In the course of treating the wastewater, biomass is produced. In addition to removing contaminants from the wastewater, the process or method of the present invention entails enhancing the PHA accumulation potential of the biomass. Disclosed are a number of processes that are employed in a biological wastewater treatment system for enhancing PHA accumulation potential. For example, enhanced PHA accumulation potential is realized by exposing the biomass to feast and famine conditions and, after exposing the biomass to famine conditions, stimulating the biomass into a period of feast by exposing the biomass to feast conditions for a selected period of time by applying an average peak stimulating RBCOD feeding rate of greater than 5 mg-COD\L\MIN in combination with an average peak specific RBCOD feeding rate greater than 0.5 mg-COD\g-VSS\MIN. In another example, the PHA accumulation potential of the biomass is enhanced by subjecting the biomass to feast conditions that cause the biomass to reach a peak respiration rate that is at least 40% of the extant maximum respiration rate of the biomass. Other processes are discussed that can contribute to enhancing PHA accumulation potential of biomass. | 08-08-2013 |
20130206686 | LIMITED VOLUME WASTE WATER SBR TREATMENT SYSTEM AND PROCESS - This invention refers to a single household waste water treatment plant, based on the SBR principle that uses two tanks, one lung tank ( | 08-15-2013 |
20130319938 | Method for Treating Water Within a Sequencing Batch Reactor, Including an In-Line Measurement of the Nitrite Concentration - A method for treating water laden with nitrogen in the form of ammonium within a sequencing batch reactor, said method including: a first step of feeding said water into said sequencing batch reactor; an aerated nitritation step); an anoxic denitritation step; and a step of extracting treated water from said reactor. The method further includes an in-line measurement of the nitrite concentration of said water in said reactor, a step of measuring the pH of said water contained in said reactor, a step of determining information that is representative of the nitrous-acid (HNO | 12-05-2013 |
20140008296 | SEPTIC TANK MONITORING SYSTEM - A septic tank monitoring system is disclosed. The system can include a septic tank gauge having a float disposed within a housing, the housing having a first magnetic switch and a second magnetic switch, the float having a magnet adapted to activate the first magnetic switch when the float is at a first level and to active the second magnetic switch when the float is at a second level. The system can also include a controller adapted to receive a signal from each of the first magnetic switch and the second magnetic switch, and to activate an auto-dialer in response to a signal from the first magnetic switch, and to activate a water supply shut off valve in response to a signal from the second magnetic switch. | 01-09-2014 |
20140027376 | METHODS, APPARATUSES, SYSTEMS AND FACILITIES FOR TREATING WASTEWATER FROM EXPLORATION FOR AND PRODUCTION OF OIL AND GAS - Volatile organic compounds (VOCs), such as BTEX methanol and other non-phase separable hydrocarbons may be removed from wastewater obtained from oil or gas exploration or production operations by way of a bioreactor. The bioreactor may employ anaerobic microorganisms that metabolize various VOCs. In some embodiments, such a bioreactor may be configured to treat process flow rates of thousands of barrels of wastewater per hour. Such a bioreactor may comprise a large vessel at a larger water treatment site. | 01-30-2014 |
20140027377 | PROCESS TO TREAT INDUSTRIAL WASTEWATER - The present invention concerns a process for treatment of industrial waste water containing both easy biodegradable and heavy biodegradable matter wherein the process comprises the two steps of first treating the waste water in a bioreactor wherein a nitrate solution is added and secondly treating the waste water in a chemical oxidation step wherein an oxidizer, permanganate, is added. | 01-30-2014 |
20140131274 | METHOD AND SYSTEM FOR TREATING WASTE MATERIAL - A method of treating wastewater in a wastewater treatment system is disclosed. The wastewater treatment system receives an influent of the wastewater and having at least a first bioreactor and a second bioreactor each having therein bacteria for treating the waste material. The method comprises: monitoring a load parameter being indicative of a load on the second bioreactor; responsively to a monitored value of the load parameter, controlling at least one flow rate selected from the group consisting of (i) a flow rate from the influent to the second bioreactor through the first bioreactor, and (ii) a flow rate from the influent directly to the second bioreactor, so as to maintain a generally constant and predetermined load on the second bioreactor. | 05-15-2014 |
20140217018 | Biological Nitrogen Removal Aeration Control - A biological reactor which is intermittently aerated to create an environment that alternates from aerobic to anoxic. A programmable logic controller controls the amount and timing of air flow to the biological reactor linking aeration to incoming load. | 08-07-2014 |
20140311972 | NITRIFICATION METHOD AND SYSTEM - A method and nitrification system for nitrifying a centrate stream produced from dewatering sludge within a wastewater treatment facility in which the centrate stream into a nitrification reactor containing accumulated centrate with a bacterial population of AOB and NOB nitrifying bacteria to the ammonia content within the centrate stream into nitrates and an oxygen containing gas is introduced into the accumulated centrate to support bacterial activity of the AOB and NOB nitrifying bacteria. Additionally, a conditioning method is obtained in which the bacterial population is grown within the nitrification reactor in conditioning stages that involve the introduction of incoming centrate into the reactor with a successively decreasing degree of dilution. | 10-23-2014 |
20140319055 | Using Continuous Nitrate Measurement to Control Aeration in an Aerated-Anoxic Process - A method and system for treating wastewater is disclosed. In one embodiment the method includes introducing the wastewater into an aerated anoxic treatment unit, flowing an oxygen containing gas into the wastewater in the aerated anoxic treatment unit at a first flow rate, measuring a concentration of a nitrogen species in the wastewater in the aerated anoxic treatment unit, comparing the measured concentration of the nitrogen species to a target nitrogen species concentration, adjusting the flow of the oxygen containing gas into the wastewater in the aerated anoxic treatment unit to a second flow rate in response to a difference in the nitrogen species and the target nitrogen species concentrations, and maintaining the second flow rate for a time period sufficient for the wastewater to be treated in the aerated anoxic treatment unit and form an anoxically treated liquid having a reduced concentration of the nitrogen species. | 10-30-2014 |
20140332464 | OXYGEN CONTROL FOR WASTEWATER TREATMENT - A method and system for controlling dissolved oxygen levels in a secondary treatment system of a wastewater treatment facility that can employ a membrane bioreactor in which oxygen introduction into mixed liquor is controlled to prevent bulking and minimize generation of extra cellular polymeric substances. The control is exercised by insuring that dissolved oxygen levels within the mixed liquor do not fall below a minimum system level at which microorganism stress would occur. This is done by setting a minimum dissolved oxygen level control point equal to a sum of the minimum system level and an adjustment factor determined on the basis of oxygen uptake rate and time delays inherent in sensing oxygen levels and changes thereof within the mixed liquor. The minimum system dissolved oxygen level can be continually calculated on the basis of an inferred food to mass ratio that would vary with sensed mixed liquor suspended solids. | 11-13-2014 |
20140374345 | WASTEWATER TREATMENT APPARATUS, WASTEWATER TREATMENT METHOD, WASTEWATER TREATMENT SYSTEM, CONTROL DEVICE, AND CONTROL METHOD - A wastewater treatment apparatus includes an air diffusing unit, a denitrification confirming unit, a nitrification confirming unit, a gas supply-amount control unit. The air diffusing unit supplies gas to nitrogen-containing water. The denitrification confirming unit provided at a first predetermined position confirms a denitrification state whether a desired proportion of the nitrate has been denitrified. The nitrification confirming unit provided at a second predetermined position confirms a nitrification state whether a desired proportion of the ammonia has been nitrified. The gas supply-amount control unit controls a gas supply amount at least on an upstream side of the denitrification confirming unit, so that the desired proportion of the nitrate is denitrified at the first predetermined position, and controls the gas supply amount at least on an upstream side of the nitrification confirming unit, so that the desired proportion of the ammonia is nitrified at the second predetermined position. | 12-25-2014 |
20140374346 | WASTEWATER TREATMENT APPARATUS, WASTEWATER TREATMENT METHOD, WASTEWATER TREATMENT SYSTEM, CONTROL DEVICE, AND CONTROL METHOD - A wastewater treatment apparatus includes: an air diffusing unit that supplies gas to nitrogen-containing water, so that ammonia contained in the nitrogen-containing water is nitrified to nitrate according to a flow of the water, and each desired proportion of the nitrate is denitrified at each position along the flow direction; a denitrification confirming unit provided at a halfway position between an upstream-side denitrification zone for obtaining a requisite minimum denitrified nitrogen amount and a downstream-side nitrification zone for obtaining ultimately required nitrified water quality, which follows the upstream-side denitrification zone on a downstream side thereof; and a gas supply-amount control unit that controls a gas supply amount from the air diffusing unit at least on an upstream side of the denitrification confirming unit, so that a desired proportion of the nitrate is denitrified at the halfway position, based on the denitrification state confirmed by the denitrification confirming unit. | 12-25-2014 |
20150048026 | SYSTEMS AND METHODS FOR AUTOMATED CONTROL OF MIXING AERATION IN TREATMENT PROCESSES - A system and method for automatically controlling aeration and mixing processes are disclosed. | 02-19-2015 |
20150053613 | ACTIVATED SLUDGE TREATMENT METHOD, AND METHOD FOR UPGRADING EXISTING WASTE WATER TREATMENT EQUIPMENT USING SAID METHOD - The object is to provide an activated sludge treatment method whereby production of excess sludge is brought substantially to zero; and a method for upgrading existing waste water treatment equipment, employing this method. The method includes a step ( | 02-26-2015 |
20150353393 | ELECTROBIOCHEMICAL REACTOR AND RELATED METHOD TO ENHANCE MICROBIAL/ENZYME FUNCTION IN TRANSFORMING OR REMOVING CONTAMINANTS FROM A LIQUID - A method for supplying freely available electrons to microorganisms and/or enzymes includes applying a voltage and amperage to electrodes to create a free electron field between the electrodes, thus directly supplying electrons to the microorganisms and/or enzymes to enhance the effectiveness of the microorganisms and/or enzymes. Supplying the microorganisms and/or enzymes with electrons enhance their effectiveness in transforming and/or removing one or more target compounds from the liquid to be treated. | 12-10-2015 |
20150353394 | System and Method for Treating Wastewater - A system and method of treating wastewater within a wastewater network, such as a sewer system, to control odor (primarily from sulfides and H | 12-10-2015 |
20160090316 | METHODS AND APPARATUSES FOR ADJUSTABLE AIR CAPTURE AND RELEASE - Methods and apparatuses for adjusting an angular orientation of a media unit having an opening are disclosed. The media unit may be secured to a rotating frame. In addition, a rotating frame including multiple media units at different angular orientations is disclosed. | 03-31-2016 |
20160096759 | METHOD FOR SELECTIVELY TREATING SLUDGE TO REMOVE COMPONENTS THEREFROM - A system comprising method and apparatus for separating biologically-digestible materials from an influent sewage stream. The system may comprise a primary clarification tank to capture sixty percent or more of the total solids from an influent stream; a sludge classifying press (SCP) to isolate and concentrate biologically digestible materials from sludge formed in the primary clarification tank, releasing valuable organics, such as are found in corn kernels, by fracturing the protective casings; a grit capture mechanism in a chamber within the primary clarification tank and isolated from the bulk of the sludge containing biologically-degradable materials; a grit trap to remove grit from the sludge prior to classifying the sludge with the SCP; apparatus for adding thickener to the sludge after classification and prior to digestion; and automation of one or more elements of the process for separating and digesting the biologically digestible materials in an influent stream. | 04-07-2016 |
20160115058 | CONTROL APPARATUS AND METHOD FOR A SEWAGE PLANT - Control apparatus and method for a sewage plant in which wastewater is nitrified and denitrified in an aeration tank by intermittent ventilation via a controllable ventilation facility, where the ammonium content of the wastewater is measured and the nitrification phase is terminated by switching off the ventilation if the measured ammonium content has dropped below a threshold value, where in order to improve control of the nitrification, the output of the ventilation facility is controlled within the duration between the start and the end of the nitrification phase as a function of the currently measured ammonium content of the wastewater and the threshold value. | 04-28-2016 |
20170233271 | PROCESS FOR ENHANCING POLYHYDROXYALKANOATE ACCUMULATION IN ACTIVATED SLUDGE BIOMASS | 08-17-2017 |