OTV SA Patent applications |
Patent application number | Title | Published |
20110284461 | Controlled Aeration of Integrated Fixed-Film Activated Sludge Bioreactor Systems for the Treatment of Wastewater - A method of biologically treating wastewater with an integrated fixed film activated sludge process. The integrated fixed film activated sludge process includes biomass suspended in mixed liquor and biomass disposed on carriers. Under certain conditions the dissolved oxygen concentration in a reactor that includes the mixed liquor, biomass suspended in the mixed liquor, and the biomass on the carriers, biological treatment is performed primarily by the biomass in the mixed liquor. This is achieved by controlling or maintaining the dissolved oxygen concentration in the reactor at a relatively low concentration. When the biomass suspended in the mixed liquor is unable to adequately biologically treat the mixed liquor, the dissolved oxygen concentration in the reactor is controlled or maintained at a relatively high concentration. This enables biomass on the carriers to contribute more to the biological treatment of the mixed liquor than when the dissolved oxygen concentration was maintained relatively low. | 11-24-2011 |
20110253624 | ANAEROBIC DIGESTER-MEMBRANE BIOREACTOR FOR TREATING A WASTE STREAM - A waste stream having anaerobically biodegradable components is fed to an anaerobic reactor where the components react with microorganisms to biodegrade the components and produce biomass and biogas. Mixing occurs in select portions of the anaerobic reactor, particularly the bottom and top portions of the reactor. Relatively heavy solids settle to the bottom and are mixed with the mixed liquor while relatively light or fine solids float to the top portion of the anaerobic reactor where they are mixed with the mixed liquor. This leaves an intermediate or middle portion of the anaerobic reactor where the concentration of solids is relatively lower compared to the concentration of solids in the upper or lower portion of the anaerobic reactor. Mixed liquor is pumped from the intermediate portion of the anaerobic reactor to a membrane separation unit where the mixed liquor is separated into a permeate stream and a retentate stream that is concentrated with solids. The retentate stream is recycled back to the anaerobic reactor and mixed with the mixed liquor therein. Further, mixed liquor and the relatively heavy solids are pumped from the bottom of the anaerobic reactor to a solids separator such as a hydrocyclone. Here the mixed liquor and solids are separated into a stream concentrated with heavier solids including a high percentage of inorganic precipitants and a lighter solids stream that contains a high percentage of biomass. This lighter solids liquid stream containing mixed liquor is recycled back to the anaerobic reactor for further treatment while the solid stream can be directed to a dewatering unit. | 10-20-2011 |
20110127220 | Method for Treating Water by Advanced Oxidation and Ballasted Flocculation, and Corresponding Treatment Plant - The invention relates to a method for treating water charged with colloidal impurities, either dissolved or suspended, in a treatment plant, wherein said method comprises: the step of contacting said water, in an advanced oxidation area, with hydrogen peroxide in the presence of at least one transition-metal salt; a flocculation step that comprises contacting said water, in a flocculation area, with at least one flocculation additive and with at least one ballast comprising at least one non-soluble granular material denser than water and used as a biomass carrier; the step of feeding the water and floc mixture thus obtained into a settling area; the step of separating the treated water at the upper portion of said settling area from a mixture of sludge and ballast resulting from the settling of said flocs; the step of extracting the sludge and ballast mixture at the lower portion of said settling area; and the step of recycling at least a portion of the sludge into said advanced oxidation area. | 06-02-2011 |
20100230366 | SEAWATER TREATMENT METHOD FOR THE PRODUCTION OF INJECTION WATER FOR UNDERSEA OIL DRILLING AND CORRESPONDING INSTALLATION - A method for decreasing the dissolved oxygen content in water used for extracting oil from rocks includes directing water and gas into a housing containing at least one hydrophobic membrane such that the water contacts only a first surface of the membrane and the gas contacts only a second surface of the membrane. The pressure of the gas is decreased thereby causing the oxygen in the water to pass through the first side of the membrane to the second side of the membrane and mix with the gas. A system for decreasing the dissolved oxygen content in water used for extracting oil from rocks includes a plurality of membrane modules. Each module contains at least one hydrophobic membrane. A water supply inlet and a gas supply inlet direct water over the first and second surface respectively of each of the hydrophobic membranes. A water outlet and a gas outlet direct water and gas respectively out of the plurality of membrane modules. | 09-16-2010 |
20100187179 | Method and Installation for Treating an Aqueous Phase Containing an Adsorbent Used Material - The invention relates to a method and installation for treatment of an aqueous phase containing a used adsorbent powdery material, such as activated carbon powder, from a water purification or potabilization installation, wherein said method includes: a first step of desorbing the main part of the organic matter adsorbed on the used adsorbent powdery material consisting of placing said aqueous phase containing the used adsorbent powdery material in contact with a desorbent compound resulting in a first aqueous phase containing at least partially regenerated adsorbent powdery material and desorbed organic matter; a first step of separating by sedimentation the main part of the desorbed organic matter from the rest of the first aqueous phase containing the at least partially regenerated adsorbent powdery material leading to the production of a second aqueous phase containing the at least partially regenerated adsorbent powdery material; a first step of neutralizing said second aqueous phase containing the at least partially regenerated adsorbent powdery material; a second step of separating the at least partially regenerated adsorbent powdery material from said second aqueous phase leading to the production of a third aqueous phase containing the at least partially regenerated adsorbent powdery material. | 07-29-2010 |
20100096335 | Water Treatment Process and Plant Using Ballasted Flocculation and Settling - A method for treating wastewater using a ballasted flocculation technique includes continuously measuring the concentration of suspended solids, organic matter or other impurities in the water to be treated prior to directing the water to be treated to a flocculation tank. Based on this measurement, the amount of ballast necessary to obtain treated water of a predetermined quality is then calculated. In the flocculation tank, ballast and a flocculating reagent are added to the water to form a water-floc mixture. The water-floc mixture is directed to a settling tank where a sludge-ballast mixture is settled. The sludge-ballast mixture is directed to a mixing tank and then to a separator to separate the ballast from the sludge. The separated ballast is directed to the flocculation tank. The separated sludge is directed to the mixing tank when the level of sludge-ballast mixture in the mixing tank is lower than a predetermined level. | 04-22-2010 |
20100065497 | MEMBRANE STATION WASTE TREATMENT PROCESS - A method of removing phosphonates from water includes directing the water into a first settling zone. The water is then directed to a membrane filtration zone and is filtered therein to produce a concentrate containing phosphonates. The concentrate containing phosphonates is then contacted with sludge such that at least some of the phosphonates in the concentrate are adsorbed onto the sludge. Flocculant is added to the sludge and the concentrate to form a floc-mixture which is directed to a second settling zone to form treated concentrate. | 03-18-2010 |
20090321354 | Membrane Reactor for the Treatment of Liquid Effluents, Comprising a Membrane for Diffusion of an Oxidizing Gas and a Selective Membrane Defining a Reaction Space Between Said Membranes - The subject of the invention is a membrane reactor for the treatment of liquid effluents containing organic pollutants, of the type comprising at least one porous membrane ( | 12-31-2009 |
20090308815 | Method of Treating Water by Ballasted Flocculation/Settling, Which Includes a Continuous Measurement of the Ballast, and Corresponding Installation - A method for treating water in a ballasted flocculation system comprises directing water into a ballasted flocculation zone and adding ballast and a flocculation reagent to the water to form a water-floc mixture. The water-floc mixture is directed into a settling zone to form treated water and sludge containing ballast. The ballast is then directed to a recirculation line where the ballast is recirculated to the ballasted flocculation zone. The method further includes determining the ballast concentration and comparing the ballast concentration with a predetermined threshold value. The rate at which ballast is recirculated to the ballasted flocculation zone is adjusted based on the determined ballast concentration and the predetermined threshold value. A ballasted flocculation system for treating water comprises a ballasted flocculation zone, a water inlet for directing water into the ballasted flocculation zone, and a flocculation reagent inlet for directing flocculation reagent into the ballasted flocculation zone. The system includes a settling zone for separating treated water from sludge containing ballast and a recirculation line for recirculating ballast from the settling zone to the ballasted flocculation zone. A first ballast inlet is operatively connected to the recirculation line for directing ballast into the ballasted flocculation zone. Finally, the system includes a sensor for measuring a parameter of ballast in the system. | 12-17-2009 |
20090301974 | Method for Wet Oxidation of Effluents Heated Essentially by Self-Combustibility, and Corresponding Installation - A method for treating effluent containing dissolved or suspended solids includes directing the effluent containing dissolved or suspended solids to a reactor and oxidizing at least a portion of the dissolved or suspended solids in the reactor with an oxidizing agent. Oxidation is carried out at a temperature ranging between approximately 20° C. and approximately 350° C. and at a pressure ranging between approximately 1 bar and approximately 160 bar. A gaseous phase and a liquid phase form within the reactor during oxidation. The method includes separating the gaseous phase from the liquid phase and heating the effluent in the reactor with the heat produced from the oxidation of the dissolved or suspended solids. | 12-10-2009 |
20090301963 | METHOD AND SYSTEM FOR TREATING WATER AND UTILIZING A MEMBRANE FILTERING SYSTEM - A method and system is provided for treating wastewater. In one process, wastewater is directed into a treatment tank and biologically treated. The biologically treated wastewater is directed as mixed liquor from the treatment tank to a bottom portion of a downstream filtration tank having at least one submerged membrane module that extends across substantially the entire cross sectional area of the filtration tank mixed liquor is directed from the bottom of the filtration tank upwardly into the membrane module such that substantially all of the mixed liquor received in the bottom of the filtration tank flows through the membrane module. As the mixed liquor flows vertically through the membrane module, the method includes inducing at least some of the mixed liquor through walls of one or more membrane filters that form a part of the membrane module, producing a permeate stream. The remaining mixed liquor passing through and from the membrane module is referred to as a non-permeate stream and the non-permeate stream, or at least a substantial portion thereof, is recirculated to the treatment tank. The filtration tank is sized relative to the membrane module and the process is carried out such that there is no substantial recycle of mixed liquor in the filtration tank itself. Although mixed liquor may be recirculated from the filtration tank back to the treatment tank and then back to the filtration tank and so forth and so on, once the mixed liquor in the filtration tank makes one pass through the membrane module the mixed liquor is recycled back to the treatment tank and generally not permitted to be recycled back through the membrane module without first returning to the treatment tank. | 12-10-2009 |
20090301948 | METHOD AND APPARATUS FOR TREATING WASTEWATER - A method and apparatus for treating wastewater. The apparatus comprises a reactor having a flow channel generally centrally located in a reactor and immersed in the water or wastewater in the reactor. An agitator is disposed within the flow channel and induces water or wastewater to enter the open upper end thereof and to move downwardly through the flow channel where the water or wastewater is discharged via a flow divider. A reagent is injected into the water or wastewater and the agitator within the flow channel serves to mix the reagent with the water or wastewater passing therethrough and in the process causes at least a slightly turbulent and downward axial flow through the flow channel. | 12-10-2009 |
20090255872 | AERATING DEVICE FOR A WATER FILTERING SYSTEM WITH IMMERSED MEMBRANES, INCLUDING A FLOOR PROVIDED WITH MEANS FOR INJECTING A GAS AND AT LEAST ONE PRESSURE BALANCING SYSTEM - An aerating device for a water treatment system includes an upper and lower chamber separated by a partition. The upper chamber includes a plurality of immersed membranes for removing contaminants from the water. The lower chamber includes a gas inlet and a water inlet for directing gas and water to be treated respectively into the lower chamber. The water inlet is disposed at a lower depth in the lower chamber than the gas inlet. A plurality of air dispersers extend through the partition from the lower chamber to the upper chamber for directing gas from the lower chamber to the upper chamber to aerate the immersed membranes. Finally, the device includes at least one passageway extending through the partition from the lower chamber to the upper chamber for directing water to be treated from the lower chamber to the upper chamber. | 10-15-2009 |
20090236290 | WATER TREATMENT DEVICE COMPRISING A REACTOR AND MEANS FOR INJECTING A REAGENT INTO THE REACTOR MOUNTED ON MOBILE SUPPORTING MEANS - The invention concerns a water treatment device comprising a reactor ( | 09-24-2009 |
20090218300 | Gravitational Separation Device for Water Treatment - A gravitational separation device for purifying water includes a basin for receiving and holding the water. The basin includes an internal wall. At least one supply channel is provided to the periphery of the basin for providing water to the basin. A plurality of openings is provided in a bottom or floor portion of the supply channel. Disposed under the openings is a plurality of deflector plates. A skirt spaced from the internal wall of the basin is inclined towards the interior of the basin at an angle of approximately 5° to 80°. A discharge channel is provided for discharging liquid from the basin, and there is also provided a device for discharging suspended particles. | 09-03-2009 |
20090218281 | Water Treating Method and Arrangement Integrating a Fixed-Bacteria Biological Treatment and Flocculation-Decantation - The inventive water treating method and arrangement successively combine at least one step consisting in biological treating at least one part of pollution contained in said waters by a fixed biomass, wherein a bio-cleaned flow logically obtainable at the and of said step, prior to the entry thereof to a next step, contains less than 2 g/l of SS, and at least one stage for carrying out a flocculation-decantation by ballasted flocs consisting in transferring biologically treated flow to a mixing area ( | 09-03-2009 |
20090184061 | REAGENT INJECTOR FOR EQUIPPING A WATER TREATMENT REACTOR, COMPRISING A NOZZLE ASSOCIATED WITH A DISPERSING MEMBER, AND CORRESPONDING WATER TREATMENT DEVICE - The invention concerns a reactant injector for equipping a water treatment reactor, comprising a nozzle associated with a dispersing member, and a corresponding water treatment device. The invention concerns an injector ( | 07-23-2009 |
20090066316 | Electrokinetic Method for Determining the Electrostatic Charge State of a Porous Membrane During Filtering and the Use Thereof - The invention relates to an electrokinetic method for determining the electrostatic charge state of a porous membrane during filtering by measuring trans-membrane variations of a flow potential. The use of the inventive method for controlling and characterising the filtering membrane cleaning efficiency is also disclosed. | 03-12-2009 |
20090050570 | Plant and Method for Water Treatment by Flocculation/Settling Using Ballasted Floc Degritting of the Sludge - A method for treating water includes directing untreated water into a mixing zone in a water treatment system and mixing the untreated water with a flocculating agent and a ballast to form a ballast-floc mixture. Thereafter, the ballast-floc mixture is directed to a settling zone where the mixture settles to form sludge. Treated water is discharged from the settling zone and the sludge is directed to a separator. The method further includes separating at least a portion of the ballast from the sludge and directing the separated ballast from the separator to the mixing zone. Finally, the sludge is directed from the separator to a sludge treatment reactor where at least some of the remaining ballast settles from the sludge and substantially ballast-free sludge is discharged from the sludge treatment reactor. | 02-26-2009 |
20080314247 | LIQUID - FOAM SYSTEM - A liquid foam system and process for treating an aqueous medium volume includes foam breaking equipment for treating foam floating on a liquid medium. The foam breaking equipment includes a foam conveyer, a rotatable driven screw for sucking foam present in the foam conveyor and for causing at least a partial defoaming of the foam and for expelling foam out of the foam conveyor, and an exhaust gas tube for removing gas within the foam conveyor released from the foam during defoaming. The foam breaking equipment may be used in conjunction with a first tank having a liquid medium and the process includes conveying foam downwardly into the foam conveyor and at least partially defoaming the conveyed foam. | 12-25-2008 |
20080296228 | Wastewater Treatment Method Comprising Decantation and Fine Screening Stages and Device for Carrying Out Said Method - A method for removing helminth egg and other suspended solids from a wastewater stream includes directing the wastewater to a ballasted flocculation system and adding a coagulation agent, flocculation agent and a ballast into the wastewater. Sludge is settled from the wastewater in a settling tank at a rate of at least 10 meters per hour. The method further includes removing helminth egg by filtering the effluent through a fine screen having a mesh diameter of approximately 5 micrometers to approximately 25 micrometers. After passing through the fine screen, the filtered effluent has less than one helminth egg per liter. | 12-04-2008 |
20080290029 | Method for Removing Organic Matter from Water and a Device for Carrying Out Said Method - A system and method is provided for removing organic matter from water. The method includes contacting the water with a powdered material with an anionic or cationic surface charge and having a particle size of between 0.1 mm and 2 mm. The powdered material is a modified product of natural origin. The system and method also provides for the regeneration of the powdered material in situ and reused. | 11-27-2008 |
20080217244 | Water Treatment Method Comprising a Rapid Settling Step Followed by a Filtration Step Directly on Micro- or Ultra-filtration Membranes, and Corresponding Device - A method for treating water includes directing the water to a ballasted flocculation system and mixing a coagulant, flocculant and a ballast with the water. Solids are separated from a clarified effluent at a speed greater than 15 m/h. The method further includes filtering the clarified effluent with one or more microfiltration membranes or ultrafiltration membranes to produce filtered water. Thereafter directing the filtered water to an RO unit or a nanofiltration membrane or membranes and subjecting the filtered water to filtration by the RO unit or the nanofiltration membrane or membranes. | 09-11-2008 |