| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 210630000 | And anaerobic treatment | 15 |
| 20080217242 | Methods and Systems for Total Nitrogen Removal - A method and related apparatus for oxidation and reduction of a reduced aqueous nitrogen contaminant. | 09-11-2008 |
| 20080223784 | Method 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 |
| 20090032460 | WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT EQUIPMENT - In a micronanobubble reaction vessel | 02-05-2009 |
| 20090236283 | Method 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 |
| 20090242482 | METHOD 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 (NO | 10-01-2009 |
| 20090272690 | Method 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 |
| 20100288698 | METHOD 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 |
| 20110120945 | Apparatus and Process for Wastewater Treatment and Biological Nutrient Removal in Activated Sludge Systems - An apparatus ( | 05-26-2011 |
| 20110180476 | Novel Anammox Bacterium Isolate - Disclosed is an isolated bacterial strain | 07-28-2011 |
| 20110186510 | SYSTEMS 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 |
| 20120055871 | Electrolysis 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 |
| 20130213883 | TREATMENT 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 |
| 20140263048 | SELF-SUSTAINING WATER RECLAMATION BIOTREATMENT SYSTEM - A process approach allows economical self-sustained operation of single vessel biotreatment systems for municipal wastewater treatment. The daytime solar powered treatment process is changed during darkness periods to operate the biotreatment system without electric grid powering. | 09-18-2014 |
| 20160023932 | METHOD FOR DEAMMONIFICATION PROCESS CONTROL USING pH, SPECIFIC CONDUCTIVITY, OR AMMONIA - A method and a system as described herein, including a method and system of treating ammonium containing water in a deammonification MBBR process where partial nitritation and anaerobic ammonium oxidation may occur simultaneously in a biofilm, or in an integrated fixed film activated sludge process where partial nitritation takes place in a suspended growth fraction and anaerobic ammonium oxidation occurs in a biofilm. The method and system include controlling airflow to the reactor to achieve a target pH, a target alkalinity, a target specific conductivity, and/or a target ammonium concentration in the reactor or in the effluent. | 01-28-2016 |
| 20160159673 | WASTEWATER TREATMENT PLANT AND METHOD FOR TREATMENT OF WASTE SLUDGE - A wastewater plant and method for treatment of wastewater sludge or other wastewater fluids are described. The wastewater plant utilizes an electrical discharge system configured for receiving a wastewater fluid, and generating a transient voltage and arcing electric current pulse through the received wastewater fluid to create an electro-hydraulic shock wave within the wastewater fluid accompanied by a high electric field, intensive heat and light radiation. | 06-09-2016 |
