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4923 results about "Raw water" patented technology
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Raw water is water found in the environment that has not been treated and does not have any of its minerals, ions, particles, bacteria, or parasites removed. Raw water includes rainwater, ground water, water from infiltration wells, and water from bodies like lakes and rivers.
Composite reverse osmosis membrane having a separation layer with polyvinyl alcohol coating and method of reverse osmotic treatment of water using the same
InactiveUS6177011B1High Salt RejectionPermit practical desalinationGeneral water supply conservationWater/sewage treatment bu osmosis/dialysisZeta potentialWater use
A reverse osmosis composite membrane that has a high salt rejection, a high water permeability, and a high fouling tolerance, and permits practical desalination at a relatively low pressure is provided by coating the surface of a reverse osmosis membrane of aromatic polyamide with polyvinyl alcohol (PVA), for example, and controlling the surface zeta potential of the separation layer within±10 mV at pH 6. This reverse osmosis composite membrane is electrically neutral and controls the electrical adsorption of membrane-fouling substances having a charge group present in water. Therefore, a high separation property can be maintained without fouling the membrane even if water containing a surfactant or a transition metal component is supplied as raw water.
Owner:NITTO DENKO CORP
Composite semipermeable membrane, processfor producing the same, and method of purifying water with the same
InactiveUS6406626B1Semi-permeable membranesWater/sewage treatment bu osmosis/dialysisPurification methodsHigh rate
The present invention relates to a composite semipermeable membrane which is characterized in that it is a composite semipermeable membrane in which there is formed by polycondensation on top of a microporous support membrane a crosslinked polyamide ultra-thin membrane layer from polyfunctional amine, polyfunctional acid halide and polyfunctional acid anhydride halide, and the flow of water permeate at an operating pressure of 0.3 MPa, a temperature of 25° C. and a pH of 6.5 lies in the range from 0.8 to 4.0 m3 / m2.day and, furthermore, the percentage humic acid removal is at least 98%; a method for the production thereof; and a water purification method employing same. With the composite semipermeable membrane obtained by means of the present invention it is possible, in particular, to recover drinking water at a high rate by permitting passage of silica and preventing deposition thereof at the membrane surface while selectively separating / removing the pollutants and trace quantities of harmful materials and their precursors, etc, contained in the raw water in water treatment plants.
Owner:TORAY IND INC
Desalination method and desalination apparatus
InactiveUS6833056B1Number of stage increasingIncrease the number ofAuxillariesGeneral water supply conservationDesalinationDistilled water
A desalination apparatus capable of obtaining fresh water stably at low cost by utilizing low-temperature waste, wherein the desalination apparatus including a heat exchanger 92 cooperating with an evaporation can 60 so as to subject a low-temperature waste heat 11 and raw water 62 in the evaporation can 60 to heat exchange and generate water vapor 63 in the evaporation can 60; a condenser 98 cooperating with a raw water tank 72 so as to receive the water vapor 63 from the evaporation can 60, cool the water vapor 63 by subjecting the water vapor 63 and raw water 71 in the raw water tank 72 to heat exchange and obtain distilled water 76; a distilled water tank for storing the distilled water 76; vacuum means for evacuating the evaporation can 60 and depressurizing the inside thereof so as to promote generation of water vapor 63 in the evaporation can 60; and raw water supply means for supplying raw water to the evaporation can.
Owner:EBARA CORP
Zero-discharge technique for separating sludge and salt from desulfurization wastewater
ActiveUS20190077686A1Reduce disposal costsReduce project operating costsWaste water treatment from gaseous effluentsWater/sewage treatment by neutralisationSludgeUltrafiltration
A zero discharge process for separating sludge and salt from desulfurization wastewater includes a pretreatment process, a membrane treatment process and an evaporative crystallization process; in the pretreatment process, the desulfurization wastewater enters a raw water tank, an aeration fan introduces compressed air into the raw water tank, and the wastewater is lifted to first-stage reaction and clarification by a raw water pump; in the membrane treatment process, the incoming wastewater is first filtered by ultrafiltration, then enters a pH adjustment tank, and is pumped into a nanofiltration membrane separation system and a reverse osmosis membrane separation system; in the evaporative crystallization process, the incoming wastewater is first subjected to two-stage preheating, then enters a degasser, and finally enters an evaporative concentration system and a crystallization system.
Owner:JIANGSU JINGYUAN ENVIRONMENTAL PROTECTION
Water purification cartridge, water purifier and method for cleaning water purifier
InactiveUS20040245174A1Simple structureEasy to cleanMembranesUltrafiltrationHollow fibre membraneFiber
An object of the present invention is to provide a water purification cartridge in which the decreased function of the hollow fiber membranes is restored by cleaning and of which the operating cost of a purification treatment of raw water decreases. The present invention provides a water purification cartridge comprising a hollow fiber membrane element comprising a plurality of hollow fiber membranes bent in a U-shape and a potting material for binding both ends of the hollow fiber membranes so as to maintain the open states of the hollow fiber membranes and a cylindrical hollow fiber membrane case for covering the hollow fiber membranes, wherein the hollow fiber membrane element is detachably installed in the hollow fiber membrane case so that a fluid-tight state is maintained between the primary side and the secondary side of the hollow fiber membranes.
Owner:MITSUBISHI RAYON CO LTD
Method for processing oil-gas field fracturing waste liquor
ActiveCN101302065AMultistage water/sewage treatmentWater/sewage treatment by neutralisationLiquid wasteBrick
The invention provides a method for treating fracturing waste fluid in an oil-gas field, belonging to the oil-gas field waste fluid treatment technology, which overcomes the problems existed in other methods. The process steps of the method are as follows: the water quality achieves a recirculation standard or accords with the II grade discharge standard of the integrated sewage discharge standard GB8978-1996, through technical treatments of raw water (pH) adjustment, H2O2 / Fe<2+> catalytic oxidation, chemical precipitation, enhanced flocculation and sedimentation, fine filter and adsorption filtration, and system settling sludge, then the settled sludge is subject to filter pressing and dehydrating, press filtrate returns to the front end for after-treatment, and mud cake is desiccated and manufactured into bricks for application or is treated through using the incinerating treatment technology. The method is an effective method for treating the fracturing waste fluid in the oil-gas field.
Owner:PUYANG TIANDIREN ENVIRONMENTAL PROTECTION TECH CO LTD
Apparatus to establish and optimize sedimentation and methane fermentation in primary wastewater ponds
InactiveUS6923906B2Raise the pHIncreases the rate of die-away of pathogenic bacteriaLiquid degasificationMixing methodsSludgeIncrease ph
Owner:GREEN FRANKLIN BAILEY +2
Mineral filtering apparatus
InactiveUS6013180ATreatment involving filtrationLoose filtering material filtersIon exchangeEngineering
The present invention relates to a mineral filtering apparatus in which the raw water is passed through a plurality of filtering processes, such as automatically filtrating without pressure, multiply filtering, ions exchange, sterilization, deodorizing, and releasing mineral substance. The filtering apparatus generally comprises a cover, an inlet water box, a first filtering unit, a filtering box, a second filtering unit, a storing reservoir, a mineral substance barrel that is disposed within the reservoir, an outlet filtering core that is disposed within the reservoir, a spout, a bottom bracket, and a water pan. The storing reservoir is provided with a mineral stone barrel with which the water soluble mineral substance is released. When the raw water flows from top to bottom, it can be treated with filtrating, deodorizing, ions exchange, sterilizing, magnetizing processes such that the treated water is clean and suitable for direct drinking. The treated water contains plentiful mineral substances that are nutritious to human beings.
Owner:WANG WEI RENN
Iron powder and sand filtration process for treatment of water contaminated with heavy metals and organic compounds
InactiveUS6942807B1Improve efficiencyGood removal effectSolid sorbent liquid separationSedimentation separationIron powderFiltration
A water filtration device (3) and method which removes heavy metals and organic compounds from raw water is provided.
Owner:STEVENS INSTITUTE OF TECHNOLOGY
Mobile field electrical supply, water purification system, wash system, water collection, reclamation, and telecommunication apparatus
InactiveUS20050016906A1Highly mobileHighly self-containedLiquid separation auxillary apparatusGeneral water supply conservationCollection systemDistillation
A mobile emergency response apparatus providing water collection, handling, treatment, and storage capabilities, as well as serving as mobile telecommunication system. The apparatus comprises a raw water filtration system, a sodium ion exchange system, a storage system with a plurality of tanks, a reverse osmosis system, and heating and distributions systems. The apparatus also comprises a mobile electrical power system. Optionally, the apparatus includes a desalination system, a disinfection system, a rainwater collection system, a fluid containment and recovery system, and an auxiliary fluid distribution system. The disinfection system may include a chlorination, ultraviolet light, or ozone disinfection system, and may further include a distillation system that may be conventionally powered or solar powered. Water may be distributed through a plurality of auxiliary devices. The telecommunication system includes both satellite and terrestrial transmission and receiving capability, and location identification devices such as a global positioning system and a radiolocation system.
Owner:NU ELEMENT
Integrated water processing technology
InactiveUS20100282654A1Quality improvementOptimizes fluxTreatment using aerobic processesWater/sewage treatment by irradiationWater processingTreated water
The invention provides a Bioreactor-Membrane Integrated Technology (B-MIT), comprising an immobilized cellular system bioreactor that initially treats raw water, functionally integrated with a membrane system where the biologically treated water is filtered to generate high quality finished water.
Owner:BLUMETRIC ENVIRONMENTAL
Water purifying system and apparatus for simultaneously making ice and cold water using one evaporator
Disclosed herein are water purifying system and apparatus for simultaneously making ice and cold water using one evaporator, which can make cold water in various forms only by changing the system and make ice of a predetermined amount by using cold water of less than a predetermined temperature as raw water for ice-making, thereby saving energy. The water purifying system and apparatus can rapidly provide cold water by the simple operation of the water gutter of the ice-making unit and the circulation of water contained in the cold water tank to the water gutter by the circulation pump, and provide ice of the predetermined amount by making ice using the cold water without regard to the changes of the temperature of raw water and the surrounding temperature.
Owner:CHUNG HO NAIS
Treatment system and treatment method for biochemical effluent of industrial wastewater
InactiveCN107651794AEfficient removalHigh recovery rate of fresh waterGeneral water supply conservationTreatment involving filtrationHigh concentrationFiltration
The invention provides a treatment system and treatment method for biochemical effluent of industrial wastewater. The treatment system comprises a flocculation sedimentation unit, a filtration unit, an advanced oxidation unit, an ultrafiltration unit, a reverse osmosis unit, a nanofiltration unit, an electrodialysis unit and an evaporation unit which are sequentially connected; and the water production outlet of the ultrafiltration unit is connected with the water inlet tank of the reverse osmosis unit, and the concentrated-water outlet of the reverse osmosis unit is connected with the water inlet of the nanofiltration unit. According to the invention, the treatment system and the treatment method utilize the coupling and synergistic effects of a physical-chemical method and a membrane technology to overcome the limitation of using a single technology, and the advanced treatment and desalination reuse of the industrial wastewater are realized; and the treatment system and the treatmentmethod have the advantages of strong adaptability to raw water, a high recovery rate of fresh water, a high concentration multiple of concentrated water, low energy consumption of evaporation and crystallization and the like, greatly improve the reuse rate of the industrial wastewater, reduce the amount of wastewater discharging, can be applied to the deep treatment and desalination reuse of various effluent wastewater, and promote the promotion and application of the technology in related industries.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Pharmacologic-functioning water and usage of the same
InactiveUS20070148256A1Excellent radical scavenging functionReduced activityOrganic active ingredientsSenses disorderHydrogenSide effect
The present invention provides a new pharmacologic-functioning water demonstrating pharmacologic function without any side effects, and usage of the same. The pharmacologic-functioning water, which demonstrates pharmacologic function without any side effects and includes antioxidant-functioning water as an active principle containing hydrogen-dissolved water, which is made up of molecular hydrogen used as a substrate that is included in raw water, and a precious metal colloid, which is included in the hydrogen-dissolved water and catalyzes the breaking reaction of the molecular hydrogen into a product of atomic hydrogen, is used for preventing and / or treating diseases.
Owner:MIZ CO LTD
Coiled reverse osmosis membrane element
ActiveCN101708433AReduce pollution rateExtended service lifeSemi-permeable membranesConcentration polarizationWater velocity
The invention discloses a coiled reverse osmosis membrane element, which is formed by winding at least one group of water purification membranes on a central water yielding pipe, wherein the water purification membrane group consists of a purified water guide net, a reverse osmosis membrane and a water inlet guide net which are overlapped; a water inlet flow channel is formed by folding the inner surface of the reverse osmosis membrane, and a water yielding flow channel is formed between the adjacent outer surfaces; the water inlet guide net is positioned in the water inlet flow channel; the purified water guide net is positioned in the water yielding flow channel; the water yielding flow channel only has a purified water outlet facing the central water yielding pipe, and other three sides of the water yielding flow channel are closed and sealed; the partial zones, far away from the central water yielding pipe, on the two sides, adjacent to a folded side, of the water inlet flow channel which are closed and sealed; so a small section raw water inlet is formed on the two sides close to the central water yielding pipe respectively and a thick water outlet is formed on the side of the water inlet flow channel opposite to the folded side. Through improvement, the reverse osmosis membrane element of the invention increases the water velocity on the surface of the membrane, reduces the concentration polarization on the surface of the membrane, and reduces the pollution speed of the coiled membrane element so as to prolong the service life of the membrane element.
Owner:A O SMITH (CHINA) ENVIRONMENTAL PRODUCTS CO LTD +1
Device and method for nitrogen and phosphorus removal for low CN ratio urban sewage through nitrosation and anaerobic ammonia oxidation coupling denitrifying phosphorus removal intensification
ActiveCN103663862AUnified denitrificationUnified phosphorus removal processMultistage water/sewage treatmentMunicipal sewageAmmonia
The invention discloses a device and a method for nitrogen and phosphorus removal for low CN ratio urban sewage through nitrosation and anaerobic ammonia oxidation coupling denitrifying phosphorus removal intensification, and belongs to the field of biological sewage treatment. The device comprises an urban sewage raw water tank, a denitrifying phosphorus removal reactor, an adjusting water tank, a sedimentation tank, and an integrated partial nitrification and anaerobic ammonia oxidation reactor; when the urban sewage enters the denitrifying phosphorus removal reactor, phosphorus-accumulating bacteria utilizes organic carbon source in the urban sewage for anaerobic phosphorus release, sedimentation and water drainage are performed, the amount of output water is adjusted by the adjusting water tank, then the output water enters the integrated partial nitrification and anaerobic ammonia oxidation reactor, contained NH4<+>-N is converted into N2 to be effectively removed through partial nitrification and anaerobic ammonia oxidation, contained PO4 <3-> and a small amount of NO3<->-N produced in the anaerobic ammonia oxidation flow back with the output water to the denitrifying phosphorus removal reactor for denitrifying phosphorus removal, and then micro-aeration is carried out for a period of time. The method reduces oxygen consumption and energy consumption, improves the nitrogen and phosphorus removal rate, and avoids the problem of insufficient carbon source.
Owner:贵州筑信水务环境产业有限公司
Method and apparatus for treatment of concentrated reverse osmosis drainage through coupled forward osmosis and reverse osmosis
InactiveCN102745776AImprove utilizationNo pollution in the processSemi-permeable membranesGeneral water supply conservationHigh pressureReverse osmosis plant
The invention discloses a method and an apparatus for treatment of a concentrated reverse osmosis drainage through coupled forward osmosis and reverse osmosis. The method comprises the following steps that: a raw forward osmosis solution directly enters into a forward osmosis assembly, a concentrated reverse osmosis drainage is used as a driving solution for forward osmosis, water of the raw forward osmosis solution permeates a membrane, the concentrated reverse osmosis drain is diluted and then mixed with raw reverse osmosis water, then flows through a high-pressure pump and enters into a reverse osmosis assembly as inflowing reverse osmosis water, water penetrating to one side of the driving solution from the raw forward osmosis solution is recycled through reverse osmosis, and the concentrated reverse osmosis drainage is circulated as the driving solution for forward osmosis. The apparatus comprises a first feed pump, a second feed pump, the forward osmosis assembly, the high-pressure pump and the reverse osmosis assembly. According to the invention, the utilization rate of the concentrated reverse osmosis drain can be increased; pollution of the concentrated reverse osmosis drainage to the environment can be reduced; the method and the apparatus can also be used for liquid concentration and desalination, producing significant economic values; and the apparatus provided by the invention has the advantages of a small occupied land area, a compact structure, simple operation, low running cost and low energy consumption.
Owner:SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
Method for treating raw water containing hardly decomposable substance
InactiveUS20070119779A1Efficient decompositionReduce concentrationUltrafiltrationSolid sorbent liquid separationDesorptionSorbent
Provided a method for treating hardly-decomposable-substance-containing water, in which hardly decomposable substances such as dioxins, contained in contaminated water (treatment raw water) are concentrated and rendered harmless by providing the steps of (B) adding an adsorbent to water containing a hardly decomposable substance (treatment raw water) to cause the hardly decomposable substance to be adsorbed on the adsorbent (adsorption treatment step), (C) separating a permeated liquid through a filter membrane to concentrate the adsorbent adsorbing the hardly decomposable substance (membrane filtering treatment step), and (D) chemically decomposing the hardly decomposable substance adsorbed on the concentrated adsorbent with a peroxide without any operation of desorption from the adsorbent (chemical decomposition step), and the method can be applied to water containing a reducing substance such as bisulfate that neutralize free chlorine and can render the hardly decomposable substances harmless efficiently at a low cost without being limited by properties of the hardly decomposable substances contained.
Owner:IDEMITSU KOSAN CO LTD
Device and method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water
ActiveCN102101720AAchieve separationEasy to controlTreatment with aerobic and anaerobic processesCelluloseSludge
The invention discloses a device and a method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water. The device comprises a raw water tank, a water inlet pump, a reactor, a secondary sedimentation tank and a sludge reflux pump, wherein overcurrent holes are arranged in the water flow direction of the reactor in an up-and-down alternative form and connected with various grid chambers, an anoxic zone grid chamber is arranged at the front end of the reactor, and an aerobic zone grid chamber is arranged at the back end of the reactor; the anoxic zone grid chamber is provided with a stirrer and an agitator blade; the aerobic zone grid chamber is provided with the stirrer, the agitator blade, an aeration riser pipe and an intermediate perforated clapboard; and the aeration riser pipe is internally provided with an aeration head, and sponge filling material is filled below the intermediate perforated clapboard, wherein filling ratio is 30-50%. In the method, shortcut nitrification is achieved above the aerobic zone through low dissolved oxygen (DO is 0.5 <-1>mg / L) and free ammonia (FA) inhibition so that ammonia nitrogen is converted to nitrite nitrogen; and anoxicammoxidation biomembrane acts on the lower part of the aerobic zone, the nitrite nitrogen and ammonia nitrogen are converted to nitrogen, thereby achieving denitrification of autotroph. The method has the advantages of low oxygen consumption, less sludge output and no extra carbon source.
Owner:彭永臻
Power recovery system
ActiveUS20090110563A1Reduce energy consumptionGeneral water supply conservationSeawater treatmentReverse osmosisHigh pressure water
A power recovery system is used for reducing the total energy consumption in a process such as an industrial treating process or a fluid refining process including the delivery of a fluid under a high pressure. The power recovery system includes a high-pressure pump for pressuring raw water, a reverse osmosis membrane cartridge for treating high-pressure water discharged from the high-pressure pump with a reverse osmosis membrane to produce treated water, a positive-displacement piston pump for pressuring raw water under the pressure of concentrated water which is discharged from the reverse osmosis membrane cartridge without being treated by the reverse osmosis membrane, and a power recovery pump turbine for boosting the pressurized raw water discharged from the positive-displacement piston pump and adding the boosted water to the high-pressure water discharged from the high-pressure pump. The power recovery pump turbine is actuated by pressurized water generated in the power recovery system.
Owner:EBARA CORP
Technique and system for zero discharging treatment of electroplating effluent
ActiveCN105271622AReduce processing costsAvoid wastingSludge treatment by de-watering/drying/thickeningWaste water treatment from metallurgical processSludgeWastewater
The invention discloses a technique and a system for zero discharging treatment of electroplating effluent. The system comprises a material classifying pre-treatment system, a biochemical comprehensive treatment system, a membrane method system, a membrane concentrated liquor vaporization system and a sludge classifying treatment system which are connected with each other in turn, wherein the sludge classifying treatment system is connected with the material classifying pre-treatment system and the biochemical comprehensive treatment system; the raw wastewater enters into the material classifying pre-treatment system; water generated by the membrane method system is recycled; the condensed liquid from the membrane concentrated liquor vaporization system is re-injected into the material classifying pre-treatment system. According to the technique provided by the invention, the wastewater is firstly treated in classifying form, so that the heavy pollution ions, such as, chromium, cyanogen, nickel, and the like, and the oily matters in the wastewater are effectively removed, and then the biochemical comprehensive treatment system is used for further treating, and lastly, the RO+SuperRo two-level combination mode is utilized to achieve the gross recovery at 94%, and meanwhile, the liquid amount for evaporation treatment is less than 6% of the gross wastewater quantity, the cost of the evaporation treatment is saved, the sludge is recycled, the waste of resources is avoided and the sludge treating cost is saved.
Owner:CHENGDU MEIFUTE MEMBRANE TECHNOLOGY CO LTD
Apparatus for producing sterilized water
InactiveUS7416326B2Easy constructionRestrains fluctuation of pressure affecting feedingFlow mixersMixing methodsChlorine dioxideSterile water
Owner:FAMILY LIFE
Method for processing reverse osmosis concentrated water
ActiveCN101723485ALow investment costReduce dosageWater/sewage treatment bu osmosis/dialysisWater/sewage treatment by flocculation/precipitationReverse osmosisWastewater
The invention relates to a method for processing reverse osmosis concentrated water, which comprises the steps of: adding oxidant into reverse osmosis concentrated water to be processed to perform an oxidizing reaction to oxidize organic matters in the concentrated water into carbon dioxide and water, and directly. discharging wastewater after oxidation Compared with the prior art, the method is simple in processing, easy to implement, low in investment and cost of processing facilities, lower in raw water COD, small in dosage of the oxidant and low in processing cost; and in addition, the method is green and environmentally-friendly and does not cause secondary pollution.
Owner:CHINA PETROLEUM & CHEM CORP +1
Power plant wastewater zero-discharge treatment technique
ActiveCN104276708AImprove flushing effectRemove supersaturationMultistage water/sewage treatmentWater/sewage treatment by flocculation/precipitationProcess equipmentDegasser
The invention discloses a power plant wastewater zero-discharge treatment technique which comprises a pretreatment process, an evaporative concentration process and an evaporative crystallization process, wherein the pretreatment process equipment comprises a precipitation and concentration tank, a sludge dewatering machine, and a raw water precipitation tank, a primary softening reactor, a secondary softening reactor and a softening precipitation tank which are sequentially connected; the evaporative concentration process equipment comprises an automatic back flush filter, a plate-type preheater, a degasser and a falling film evaporator which are sequentially communicated; and the evaporative crystallization process equipment comprises a concentrated solution tank, a crystallizing heater and a crystallizer which are sequentially communicated. The desulfurization water treatment technique is reasonable in step design and performs the pretreatment, evaporative concentration and evaporative crystallization on the desulfurization wastewater, and the end products are only distilled water and crystalline salt, thereby reducing the discharge of the harmful substances, lowering the energy consumption and implementing the goal of zero discharge of desulfurization wastewater.
Owner:JIANGSU JINGYUAN ENVIRONMENTAL PROTECTION
Process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation
ActiveCN102557356AAvoid inhibitionImprove efficiencyTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentSequencing batch reactorChemistry
The invention provides a process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation, which belongs to the technical field of sewage biological treatment. The process comprises an untreated water tank, a sequencing batch reactor (SBR) for removing organic matters, a first regulating water tank, a half shortcut nitrification SBR, a second regulating water tank and an autotrophic denitrification upflow anaerobic sludge blanket (UASB) reactor sequentially connected in series. Sludge is separated according to sludge age, which avoids an influence of rapid propagation of heterotrophic bacteria to autotrophic denitrification flora; and a nitrification system adopts half shortcut nitrification, which stably maintains shortcut more easily, ensures the nitrosification rate of the nitrification system, and provides guarantee for denitrification stability of the system. The anaerobic ammonium oxidation technique is applied to deep denitrification treatment of domestic sewage, which reduces the oxygen consumption by 60% compared with the conventional denitrification method, is free of additional carbon sources and neutralizers, and realizes high-efficiency low-energy consumption municipal sewage treatment.
Owner:BEIJING UNIV OF TECH
Poly metal cluster water purifying material and its preparing method and use
ActiveCN1821108AEfficient removalQuick removalWater/sewage treatment by electrochemical methodsWater/sewage treatment using germicide/oligodynamic-processRare earthHigh activity
The present invention relates to polynary metal cluster as water purifying material and its preparation process and use. The water purifying material is prepared with porous material in 50-99 wt%, and two or more metals of Ag, Cu, Zn and RE in 1-50 wt%. The preparation process includes: selecting metal source; adding the metal source directly or after being compounded into water solution into the porous material to form combined body; and introducing reductant after roasting. Water to be purified is made to flow through the water purifying material or mixed with the water purifying material for purifying. The water purifying material has great specific surface area, high activity and high homogeneity, and may be used to eliminate water soluble heavy metal ion, micro organic pollutant, residual chlorine and sterilizing side product in high effect.
Owner:广州净易环保科技有限公司
Method and device for treating high-salt refractory organic wastewater
PendingCN106495386AHigh thermal efficiencyReduce energy consumptionWater contaminantsMultistage water/sewage treatmentHigh concentrationVapor liquid
The invention discloses a method and a device for treating high-salt refractory organic wastewater, and particularly relates to a method and a device for treating high-concentration refractory COD and high-salt industrial wastewater by coupling the catalytic wet oxidation and MVR evaporation and concentration crystallization technology. The device comprises a vapor-liquid heat exchanger, a liquid-liquid exchanger, a booster pump (or a circulating pump), a compression fan, an oxidant dosing device, a wet catalytic oxidation reactor (WAO), an evaporator, a vapor compressor and a vapor-water separator. Raw water is subjected to air catalytic wet oxidation in the WAO reactor after two-stage preheating through the vapor-liquid heat exchanger and the liquid-liquid exchanger; the oxidized wastewater is evaporated and concentrated by an evaporator to obtain crystalline salt and the distilled water. The method and the device provided by the invention combine advantages of a wet oxidation technology and an MVR technology, effectively degrade organic matters, improve biodegradability of wastewater, and realize effective utilization of heat energy generated by WAO oxidation reaction and secondary vapor of the evaporator.
Owner:HUNAN PINGAN ENVIRONMENT PROTECTION
Method of monitoring membrane separation processes
InactiveUS6838002B2Operation efficiency can be improvedSuitable for useChemiluminescene/bioluminescenceUltrafiltrationWastewaterWater processing
Methods and systems for monitoring and / or controlling membrane separation systems or processes are provided. The present invention utilizes measurable amounts of inert fluorescent tracers and tagged fluorescent agents added to a feed stream to evaluate and / or control one or more parameters specific to membrane separation such that performance thereof can be optimized. The methods and systems of the present invention can be utilized in a variety of different industrial applications including raw water processing and waste water processing.
Owner:ECOLAB USA INC
Filtration apparatus
A filtration apparatus is provided which is easy to maintain, manage and which enables preservation of filtration characteristics due to the fact that filtration is carried out by use of a gelatinous filter apparatus. In the filtration apparatus, filtration characteristics can be maintained by providing a bubble supplying mechanism for removing a sedimentary layer comprising removables that is formed on a surface of a filtration film and a filtration characteristics restoring mechanism for restoring the filter film clogged by the removables by causing a back-flow of filtered water accumulated in a cistern. Filtration apparatus maintenance and management are facilitated by improving recovery efficiency of the precipitated removables by tapering a lower part inside a raw water tank and providing a recovery tank for recovering removables via a valve.
Owner:SANYO AQUA TECH +1
Dropping, aeration and biological pretreatment- super filtering combined drinking water purification process
InactiveCN1807277ALow running costReduce turbidityTreatment using aerobic processesUltrafiltrationUltrafiltrationWater source
The disclosed water-drop aeration biopretreatment-ultrafiltration combined purification technique for drinking water comprises: first, building the multistage water-drop aeration biopretreatment device; then, pumping the raw water once to remove the most ammonia nitrogen by cascade water-drop oxygenation and biological contact oxidation pretreatment and convert the micro dissolved organic into microbe cell; filtering by the protective porous ceramic-aggregate pond; followingly, leading into the ultrafiltration membrane module to reduce the micro organic, ammonia nitrogen, particulate matter, most seston, colloid, and bacteria till meeting the drinking water quality standard. This invention belongs to green technique without coagulant or chlorine, reduces cost and land area, and has wide application for small-scale drinking water treatment.
Owner:SHANGHAI WATERWORKS SHIBEI +1
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