| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 210609000 | Including dewatering sludge | 33 |
| 20080230472 | Wastewater Purification System - An object of the present invention is to provide a control method, for a wastewater purification system, where the status of a wastewater purification system employing a batch activated sludge process is accurately understood by analyzing the data waveforms of DO, ORP and pH. In the control method for a wastewater purification system, an aeration device is controlled by a programmable sequencer, a controller acquires respective data waveforms from a first sensor, a second sensor and a third sensor and the control status data of the programmable sequencer, the controller analyzes the data waveform of dissolved oxygen concentration from the first sensor, the data waveform of oxidation-reduction potential from the second sensor, and the data waveform of hydrogen ion concentration from the third sensor, and the controller performs an alarm process when a deviation from a previously fixed normal state is discovered as a result of the analysis. | 09-25-2008 |
| 20080264856 | Bioreactor System for Biological Degradation of Oily Sludge - A 10,000 gallon sequencing batch reactor tank for the on-site bio-degradation of oily sludge. Bacteria already present in and adapted to oily sludge degrade the hydrocarbons found in oily sludge within two weeks from 20,000 ppm to less than 100 ppm. A degradation cycle requires 5 days. After five days a recirculation pump and aeration system are turned off and solids are allowed to settle to the bottom of the tank. An ultrafiltration unit connected to the tank requires approximately 16 hours to process the contents of the reactor tank. | 10-30-2008 |
| 20080314828 | APPARATUS AND METHOD FOR THE TREATMENT OF WASTE - A facility for treating solid and liquid waste includes a receiving station, a screening station, a preprocessing station, a press station and a processing station. The screening station is connected to an inlet capable of receiving liquid and solid waste and includes a screen for capturing at least some of the solid waste. The preprocessing station is in fluid communication with the screening station, and includes a degrit chamber for settling out an additional amount of the solids. The press station included at least one alkali mixing tank and a screw press for separating out an additional portion of the solids. The processing station includes at least one aerobic microorganism generating unit for converting nitrites into nitrogen gas and consuming carbon-based waste material. | 12-25-2008 |
| 20090008326 | METHOD AND APPARATUS FOR COLLECTING BACTERIAL CELLS, METHOD FOR ACCLIMATIZING BACTERIAL CELLS, AND WASTEWATER TREATMENT EQUIPMENT - A method for collecting bacterial cells includes feeding water to be treated containing ammonium and nitrite to an anaerobic ammonium oxidation vessel to denitrify ammonium and nitrite by anaerobic ammonium oxidizing bacteria for forming denitrified treated water, feeding the denitrified treated water to a precipitation vessel or membrane separation unit to collect anaerobic ammonium oxidizing bacteria in the denitrified treated water in a separated sludge obtained by solid-liquid separation in the precipitation vessel or membrane separation in the membrane separation unit, and optionally returning the denitrified treated water from the precipitation vessel or membrane separation unit to the anaerobic ammonium oxidation vessel. | 01-08-2009 |
| 20090050561 | SYSTEM AND METHOD FOR PROCESSING WASTEWATER - A system and method for processing wastewater into usable water is provided. The method comprises: receiving a supply of wastewater; passing the wastewater into a refractory vessel having a heat generator associated therewith; increasing the temperature of the wastewater to a predetermined temperature using the heat generator for a predetermined amount of time to produce heated exhaust gases containing at least one product gas and water vapor; separating the at least one product gas and water vapor; and condensing the water vapor to produce usable water. The system comprises a refractory vessel defining a heat processing zone, a heat generator that is used to increase the temperature of the wastewater to produce a heated exhaust gas containing at least one product gas and water vapor, a scrubber to separate the product gases and the water vapor, and a condenser to condense the water vapor into usable water. | 02-26-2009 |
| 20090078647 | SYSTEM AND METHOD FOR BIOREMEDIATING OIL FIELD CUTTINGS - Apparatus and methods for bioremediating hydrocarbon contaminated solids. The method can include introducing a slurry comprising one or more drilling fluids and one or more hydrocarbon contaminated solids to a settling system. The settling system can include one or more housings having a receiving compartment at a first end thereof and a collecting compartment at a second end thereof. A barrier can be disposed in the receiving compartment, and at least one wall can be disposed transversely in the housing between the receiving and collecting compartments. The wall can have at least one aperture formed therethrough and at least one flow-restricting baffle disposed thereon, wherein the one or more baffles extend perpendicularly from the wall. The separated hydrocarbon contaminated solids can be contacted with one or more microorganism populations disposed between the receiving compartment and the collecting department. | 03-26-2009 |
| 20090173688 | SYSTEMS AND METHODS FOR UTILIZATION OF WASTE HEAT FOR SLUDGE TREATMENT AND ENERGY GENERATION - Disclosed methods employ systems and methods to treat sludge utilizing waste heat. The disclosed systems and methods can be used to provide a regional sludge treatment service. | 07-09-2009 |
| 20100193429 | Method and apparatus to reduce wastewater treatment plant footprints and costs - A method and apparatus for reducing the footprint of chemical/mechanical/biological wastewater treatment facilities employing sulfur dioxide disinfection and chemical dewatering of solids in conjunction with an environmental biological systems for treating the separated treated wastewater. | 08-05-2010 |
| 20100282671 | METHOD OF TREATING WASTEWATER - Provided is a method of treating wastewater, containing: the flow-in step of flowing an organic wastewater into an activated sludge tank holding an activated sludge containing microorganisms therein; and the separation step of biologically treating the organic wastewater in the activated sludge tank and then subjecting thus treated liquor to solid-liquid separation with the use of a separation membrane device located in the activated sludge tank, wherein the sugar concentration in the aqueous phase of the activated sludge is maintained within a certain range in the separation step. The method of the present invention allows adequately evaluating the risk of decreasing the effective membrane area caused by the adhesion of biopolymers to the membrane surface, thus achieving efficient wastewater treatment while preventing the increase in the membrane filtration resistance. | 11-11-2010 |
| 20100282672 | PROCESS FOR EXOTHERMAL TREATMENT AND RECOVERY OF SOLID, SEMI-SOLID, PASTY AND/OR DAMP WASTE - The present invention refers to a process for exothermal treatment and recovery of masses comprising: urban solid waste (USW—), including differentiated and non-differentiated damp waste and non-differentiated waste of vegetable origin; sludge generated by industrial and non-industrial water treatment; solid, semi-solid, pasty residue and/or sludge residue coming from industrial, agricultural and food-processing operations; soils and inert materials contaminated by organic matrices; solid, semi-solid, pasty residue and/or sludge residue of hydrocarbon compounds, including asphalt and organic-chemical compounds; contaminating animal excrements, such as those of poultry and/or swine. In particular, said process envisages the use of an exothermal reaction produced by mixing the mass to be treated with a mixture of calcium oxides (CaO) and/or calcium hydroxides Ca(OH)2, in the presence of an inert catalyst moistened with water, in the absence of oxygen using the charcoal-pile technique. | 11-11-2010 |
| 20120085703 | Distributed facultative bacteria water treatment system with membrane biological reactor package plant augmentation - The invention is directed to wastewater treatment and wastewater reuse. A distributed biological treatment system for modification of the sewer biofilm through the mechanism of competitive exclusion by strategic dosing with facultative bacteria is illustrated, in conjunction with a novel membrane biological reactor (MBR)/biological breeding reactor (BBR) package plant, a plurality of which are likewise designed for strategic placement throughout the sewer/collection system infrastructure. The inclusion of the MBR/BBR plants at specific locations within the distribution system provide upstream water reclamation, thereby facilitating more efficient operation of the downstream wastewater treatment plant and providing for water reuse at intermediate points within the distribution network, as well as a means for concentrating the facultative bacteria which has been dosed to various points in the system, which can then be re-inoculated to the system. | 04-12-2012 |
| 20120097607 | SEWAGE TREATMENT PLANT - Waste water conditioning has nearly 150 years of history. During this time, a method has developed that is considered to be state of the art. While this method meets the requirements at hand, it is complicated and expensive. The novel method breaks down the rigidly entrenched method and simplifies it. In a plurality of stages, the only energy that is used is gravity, which is readily available and free of cost. Thus, an “alternative sewage treatment plant” has been developed, which has a simpler method and is less expensive in terms of investment costs and operating costs, at the same capacity, and requires only a fraction of the previous required surface area. The most important characteristic of the invention is that the novel method separates solids from waste water immediately after entering the sewage treatment plant. Mechanically purified water is much faster, easier and less expensive to purify. The paths pursued for conditioning of the sludge are also new. The sludge is regarded as an energy source or recyclable material, which should be utilized accordingly. According to the invention, the prerequisite for utilizing the sludge is also created by economically drying it to 95 to 98% dry substance. | 04-26-2012 |
| 20130001160 | METHOD FOR THE BIOLOGICAL PURIFICATION OF AMMONIUM-CONTAINING WASTEWATER - A method for the biological purification of ammonium-containing wastewater. The wastewater is purified in an aeration tank in which a low oxygen concentration of less than 1.0 mg/l is set so as to first convert, using aerobically oxidizing bacteria, ammonium contained in the wastewater to nitrite and then to convert, using anaerobically oxidizing bacteria, ammonium and nitrite to elemental nitrogen. At least a part of surplus sludge formed in the aeration tank is separated into a heavy sludge phase and a light sludge phase. The light sludge phase is fed as surplus sludge to a sludge digestion. Sludge water that is separated off from the sludge in a sludge dewatering is fed to a deammonifying tank. Nitrogen compounds in the sludge water are converted, by deammonification in the deammonifying tank, to elemental nitrogen. Surplus sludge formed in the deammonifying tank is fed to the aeration tank. | 01-03-2013 |
| 20130015125 | METHOD AND DEVICE FOR BIOLOGICAL WASTEWATER PURIFICATIONAANM Ingerle; KurtAACI GotzensAACO ATAAGP Ingerle; Kurt Gotzens AT - The present invention relates to the biological purification of wastewater by means of activated sludge, wherein the wastewater is first introduced into an activated-sludge tank (B tank) that can be ventilated and then is introduced into one of two sedimentation and recirculation tanks (SU tanks) in alternation, the sedimentation and recirculation tanks being continuously connected hydraulically to the B tank. In the sedimentation and recirculation tanks, the activated sludge and the treated water are separated by sedimentation (V phase), and thereafter activated sludge is fed back into the B tank (S phase). Then the contents of the SU tank are mixed (U phase). Finally, the treated water is drawn off (A phase). The cycles in the SU tanks are phase-shifted and the A phases border on each other so that there is flow through the SU tanks only in the A phases, an approximately constant water level is present, and thus a wastewater treatment plant discharge corresponding to the wastewater treatment plant supply develops (continuous flow principle). In order for the thickened sludge fed back from the SU tank into the B tank not to flow back into the SU tank (S phase), two ventilation fields are provided in the B tank, wherein in the S phases, only the ventilation field adjacent to the SU tank in which the S phase is miming is operated. | 01-17-2013 |
| 20130134090 | DIGESTION OF BIOSOLIDS IN WASTEWATER - A method enhancing biological digestion of wastewater sludge is provided. The method uses chlorine dioxide to accelerate and improve the efficiency of aerobic or anaerobic digestion. | 05-30-2013 |
| 20130248443 | SELENIUM RECOVERY FROM BIOREACTOR SLUDGE - Wastewater, for example flue gas desulphurization blowdown water, containing soluble selenium is treated in a bioreactor. Microorganisms in the reactor reduce the selenium to elemental selenium, which is insoluble. The elemental selenium is discharged from the reactor in waste sludge also comprising biomass and other suspended solids. Non-microbial suspended solids are removed by way of acid dissolution followed by de-watering. The remaining sludge is burned at a temperature below the selenium oxidation temperature to remove biomass while leaving selenium particles behind. | 09-26-2013 |
| 20130277302 | WATER TREATMENT SYSTEM - A treatment system for removing a plurality of pollutants from wastewater includes a removal device for removing a plurality of gross solids from the wastewater, an aeration device for reducing a biochemical oxygen demand (BOD) and a chemical oxygen demand (COD) of the wastewater and a bioreactor containing a bacterial biofilm, said bioreactor including a plurality of cells configured for operation on a predetermined drain fill cycle. | 10-24-2013 |
| 20130306553 | METHOD FOR TREATING PROCESS WATER FROM A PLANT FOR THE HYDROTHERMAL CARBONISATION OF RENEWABLE RAW MATERIALS AND ORGANIC RESIDUES - The invention relates to a method for the treatment of process water which is obtained in a plant for the hydrothermal carbonization of renewable raw materials and organic residual materials by an evaporation of process water, a condensation of the washed process steam, and a biological treatment of the process steam condensate as partial quantity or possibly as total quantity of the amount of waste water discharged from an HTC plant. | 11-21-2013 |
| 20130319937 | Modular, Scalable High Solids Methane Digester for Small-Sized to Medium-Sized Farms - A modular methane digester facility includes prefabricated portable concrete panels and a flexible membrane roof sealing an interior space of the methane digester. A separator-conveyor dewatering device, integratable into the front end of the methane digester facility, separates a semi-solid liquid manure into a liquid portion and a solid portion. A method of dual-stage methane digestion includes stacking a solid stage in a methane digester and supplying a liquid stage to the top of the solid stage. The liquid stage percolates by gravity through the solid stage, the solid stage acts as a filter for the liquid stage, and the liquid stage acts as a methanogenic buffer for the solid stage. A method of pre-heating a mass of solids in a methane digester to a mesophilic temperature includes supplying oxygen to the mass of solids in the form of ambient air supplied to the methane digester by a reverse-air pump. | 12-05-2013 |
| 20140034574 | TREATMENT OF WASTE PRODUCTS WITH ANAEROBIC DIGESTION - A waste stream is treated by anaerobic digestion. A process is described involves a step of separating solids from digestate, and returning separated solids to a digester. Optionally, there may be a step of solids separation in which larger solids are removed from the digester. A process and apparatus are described for treating waste sludge from a wastewater treatment plant in an anaerobic digester. Feed sludge is thickened or solids are separated from digestate and returned to the digester. Additional co-digestion waste may be added to the digester. The process and apparatus may be used in a retrofit of an existing wastewater treatment plant. | 02-06-2014 |
| 20140061126 | METHOD AND SYSTEM FOR FILTRATION AND FILTRATION CAKE LAYER FORMATION - The present invention relates to filtration of liquids, such as water, containing substances that desirably should be removed from the liquids. The invention relates in particular to a filtration cake, being produced in situ of a cleaning system from substances that desirably should be filtered away. Particular preferred embodiments of the present invention relate to treatment of waste water, where an activated sludge is provided, which sludge contains activated sludge flocs. These flocs are accumulated on a fluid penetrable support structure to form a layer of flocs, which subsequently is compressed to form a filter of desired properties. The invention also relates to adapting waste water—or other liquids containing biodegradable substances—to optimised biodegradation and filtration by deflocculating flocs in an activated sludge during or before a biodegradation step and subsequently promoting re-flocculation prior to filtering or other means of biomass separation. | 03-06-2014 |
| 20140116938 | Chemical Treatment Method and Apparatus to Increase Wastewater Bioreactor Processing Capacity While Producing Class A Biosolids - A chemical/mechanical sludge dewatering treatment method and apparatus injecting SO | 05-01-2014 |
| 20140151295 | PLANTS FOR ADVANCED TREATMENT OF WASTEWATER AND METHOD FOR TREATING WASTEWATER USING THEREOF - The invention relates to an advanced wastewater treatment apparatus that may include a forward osmosis module, a draw-solution separation device, and an ammonia removal device. The forward osmosis module may be installed after a first settling tank, and may include an inflow-water side where water treated by the first settling tank flows, a separation membrane for allowing the treated water to pass therethrough, and a draw-solution side where the draw solution flows. The draw-solution separation device may separate the draw solution and the water of the draw solution, return the separated draw solution to the draw-solution side of the forward osmosis module, and discharge the separated water to the outside. The ammonia removal device may eliminate the ammonia from the treated water of the forward osmosis module. | 06-05-2014 |
| 20140231345 | METHOD AND FACILITY FOR TREATING WASTEWATER CONTAINING HYDROCARBONS, IN PARTICULAR AROMATIC COMPOUNDS - The invention relates to a method for treating wastewater containing hydrocarbons, in particular hydrocarbons from the group of compounds referred to as BTEX, comprising benzene, toluene, ethylbenzene and xylene aromatic compounds, said wastewater being in particular from the production or conditioning of natural gas, wherein, according to the method, the wastewater is subjected to stripping by the natural gas such that the hydrocarbon pollution is not only removed from the water by means of being transferred to the gas, but also eliminated during the subsequent combustion of the gas. The wastewater to be treated has a soluble BTEX content that is no higher than 1,200 ppm, preferably no higher than 900 ppm, and the weight ratio of the stripping gas to the treated water is less than 10%, the water being discharged from the stripper having a soluble BTEX content that is no higher than 30 ppm. | 08-21-2014 |
| 20140251901 | Energy Efficient System and Process for Treating Sludge - Apparatus and process is provided for hydrolyzing sludge from water treatment and for conditioning the hydrolyzed sludge for optimal anaerobic digestion. Methods provided include dewatering to produce dewatered sludge, hydrolyzing the dewatered sludge in a steam fed process, preheating the dewatered sludge before hydrolysis with sludge-to-sludge heat transfer, and cooling and diluting the sludge using sludge-to-water heat transfer and water injection, and anaerobically digesting the hydrolyzed sludge. Apparatus provided includes a generally vertically oriented counterflow sludge-to-sludge heat exchanger, a hydrolysis reactor and associated source of steam, sludge-to-water heat exchangers, and a dilution unit. Temperature and pressure sensors are configured to command various variable flow pumps and valves for controlling the process. | 09-11-2014 |
| 20140251902 | METHOD AND DEVICE FOR THERMAL BIOLOGICAL BREAKDOWN AND DEWATERING OF BIOMASS - A method is described for thermal biological breakdown and dewatering of biomass, which is characterised in that it comprises the following steps:
| 09-11-2014 |
| 20150048025 | TREATMENT OF IRON CONTAMINATED LIQUIDS WITH AN ACTIVATED IRON SOLIDS (AIS) PROCESS - Method for treating iron-contaminated water using a treatment approach identified herein as the Activated Iron Solids (AIS) Process. The AIS process is capable of oxidizing and removing iron as iron oxides from iron-contaminated waters producing a clean effluent. The AIS process is performed in a single or multiple tank system in which high concentrations of AIS are suspended through mechanical mixing to maintain a catalytic surface chemistry environment that increases iron removal thousands times faster than would naturally occur and hundreds times faster than existing arts (e.g., aerobic pond passive treatment). The AIS process can utilize inexpensive alkaline material (such as, pulverized limestone) where initial mine drainage alkalinity (mg/L as CaCO | 02-19-2015 |
| 20160096757 | METHOD AND APPARATUS FOR SEPARATING BIOLOGICALLY DIGESTIBLE MATERIALS FROM AN INFLUENT STREAM - 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 |
| 20160096762 | TREATMENT OF WASTE PRODUCTS WITH ANAEROBIC DIGESTION - A waste stream is treated by anaerobic digestion. A process is described involves a step of separating solids from digestate, and returning separated solids to a digester. Optionally, there may be a step of solids separation in which larger solids are removed from the digester. A process and apparatus are described for treating waste sludge from a wastewater treatment plant in an anaerobic digester. Feed sludge is thickened or solids are separated from digestate and returned to the digester. Additional co-digestion waste may be added to the digester. The process and apparatus may be used in a retrofit of an existing wastewater treatment plant. | 04-07-2016 |
| 20160185640 | PROCESS AND DEVICE FOR CONTINUOUS THERMAL HYDROLYSIS - Method for the continuous thermal hydrolysis of sludges containing organic matter, said method comprising the steps of:
| 06-30-2016 |
| 20170233278 | PROCESS FOR PRODUCING FREEZE-DRIED SLUDGE | 08-17-2017 |
| 20180022626 | OPTIMISATION OF A PULP TREATMENT METHOD | 01-25-2018 |
| 20190144321 | IMPROVING SLUDGE DEWATERABILITY AND ENERGY BALANCE OF WASTEWATER TREATMENT | 05-16-2019 |
