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39 results about "Magnesium ammonium phosphate crystals" patented technology
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Livestock breeding wastewater nutrient pollution control and recycling process
InactiveCN101962244ARaise the pHTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentTrappingLivestock breeding
The invention discloses a livestock breeding wastewater nutrient pollution control and recycling process, which mainly comprises the following steps of: making livestock breeding wastewater (1) subjected to anaerobic treatment pass through a front adjusting tank (2), respectively injecting into a sequencing batch MAP (3) or continuous-flow MAP reactor (4), blowing off soluble CO2 through exposureto improve the pH of the wastewater, and trapping and recycling magnesium ammonium phosphate crystals generated by combining PO43- with NH4+ and Mg2+ in the wastewater by using a trap (10); making the wastewater pass through a middle adjusting tank (5) and enter an MBBR reactor (6) to remove COD and NH4+-N; and settling the effluent in a sedimentation tank (7) and discharging. In the process, theMAP technology and MBBR technology are combined, phosphorus is removed and recycled by a physicochemical method, and the COD and the NH4+-N are removed by a biomembrane method so as to realize the standard drainage of the wastewater and recycle nutrient elements such as N, P and Mg. The process is simple and convenient to operate and is stable to run.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
Gas stripping type internal circulation device, and method for recovering nitrogen, phosphor from MAP crystal
InactiveCN101092264ADosing method is simpleImprove the feeding methodPhosphatesSolution crystallizationSeed crystalMagnesium ammonium phosphate crystals
This invention relates to apparatus and method for recovering N and P by crystallization. The method solves the problems of complex N and P recovery process, high cost and low recovery rate. The bottom of the outer sleeve and the top of the cylinder are fixed. An overflow weir is formed between the outer sleeve and the cylinder. The water inlet of the water discharge pipe and the water outlet at the bottom of the outer sleeve are through connected. The lower end of the cylinder and the upper end of the conical cylinder bottom are fixed. The method comprises: sending wastewater containing NH4+-N and PO43--P into an air-lift internal circulation apparatus, adding a solution containing Mg2+, introducing air, adjusting the pH value to 8.5-10, reacting for 10-30 min, precipitating the obtained magnesium ammonium phosphate crystal, and sending to the reaction zone as the seed crystal by internal circulation. The method has such advantages as high recovery rate, simple process, low investment, good treatment effect, and easy application. The apparatus has such advantages as simple structure and easy operation.
Owner:HARBIN INST OF TECH
Device and method for bypass phosphorus recovery of town sewage treatment plant
InactiveCN102964032AAchieve recyclingSolve efficiency problemsMultistage water/sewage treatmentPhosphorus compoundsSludgeTreatment pond
The invention discloses a device and a method for bypass phosphorus recovery of a town sewage treatment plant, and belongs to the technical field of sewage treatment and resource recycling. The device comprises a general sewage treatment subsystem and a bypass phosphorus recovery subsystem, wherein the general sewage treatment subsystem comprises a sewage anaerobic biochemical treatment pond, a sewage aerobic biochemical treatment pond and a secondary settling pond; and the bypass phosphorus recovery subsystem comprises an anaerobic phosphorus releasing pond, a phosphorus stirring and crystallizing pond and a crystal recovering pond. The method comprises the following steps in sequence: initially concentrating the pretreated sewage by the general sewage treatment subsystem, so as to obtain sludge; feeding the sludge into the anaerobic phosphorus releasing pond by a sludge scrapping and absorbing machine to release the phosphorus for 60 minutes; transferring the supernate into the phosphorus stirring and crystallizing pond, and feeding magnesium chloride solution and saturated ammonia water into the phosphorus stirring and crystallizing pond to react with the supernate, so as to obtain a magnesium ammonium phosphate crystal; and recovering the magnesium ammonium phosphate crystal by the crystal recovery pond. By adopting the device and method, the problems of the sewage treatment plant that the biological phosphorus removal method is low in efficiency and the chemical phosphorus removal method is high in cost, can be effectively solved, and the recovered phosphorus is of high value in use, so that the recycling of the phosphorus resource is realized, and higher economic value and social value are provided.
Owner:北京市可持续发展促进会
Method and system for treating high ammonia-nitrogen wastewater
ActiveCN107244726AImprove processing efficiencyHigh removal rateWater treatment compoundsWater contaminantsPhosphateMagnesium salt
The invention discloses a method and system for treating high ammonia-nitrogen wastewater. By taking effluent water containing high ammonia nitrogen content after anaerobic fermentation as influent water and taking a phosphate and magnesium salt mixed solution as an auxiliary solution, a liquid-liquid hypergravity reactor is utilized to enhance the mass transfer effect during mixing of the two liquid phases; crystallized and settling magnesium ammonium phosphate crystals are collected at the bottom of the reactor by means of the reaction-settlement integrated hypergravity reactor while the two liquid phases react; the liquid phases after the reaction overflow at the top of the reactor to produce effluent water; and the magnesium ammonium phosphate crystals are discharged at the bottom of the reactor.
Owner:中工环境科技有限公司
Wastewater nitrogen and phosphorus removing method based on magnesite
ActiveCN104944561ASolve the costSolve the problem of impurity of precipitated productsWater/sewage treatment by neutralisationWater/sewage treatment by flocculation/precipitationMagnesiteCalcination
The invention discloses a wastewater nitrogen and phosphorus removing method based on magnesite, and belongs to the field of wastewater treatment. The wastewater nitrogen and phosphorus removing method comprises the following steps: (1) crushing magnesite, sieving the magnesite powder, and carrying out high-temperature calcination, so as to obtain a calcined product; (2) adjusting the initial pH value of wastewater, adding the calcined product obtained in the step (1) into the adjusted wastewater, adjusting the molar ratio of the calcined product to ammonia nitrogen or phosphate in the wastewater added with the calcined product, and stirring for a preset time; (3) adding sodium dihydrogen phosphate or ammonia chloride into the mixed product, so as to obtain magnesium ammonium phosphate crystals. The wastewater nitrogen and phosphorus removing method has the advantages that as the calcined product of magnesite is taken as a magnesium source, the adding method of ammoniomagnesium phosphate crystal medicament is replaced, the problem of relatively high medicament cost of the conventional ammoniomagnesium phosphate crystal method is solved, while the nitrogen and phosphorus removing efficiencies are improved; the recycled solid magnesium ammonium phosphate can be used for preparation of controlled-release fertilizers or cyclic utilization.
Owner:JINGDEZHEN CERAMIC INSTITUTE
Phosphorus recovery device for excess sludge
InactiveCN103193370AGuaranteed anaerobic effectGuaranteed puritySludge treatment by de-watering/drying/thickeningBiological sludge treatmentAnaerobic reactorMagnesium ammonium phosphate crystals
The invention belongs to the field of sludge and sewage treatment in environmental engineering, and particularly relates to a phosphorus recovery device for excess sludge. The device comprises a nitrogen-phosphorus recovering device and a sludge anaerobic reactor which is connected with the nitrogen-phosphorus recovering device, wherein the sludge anaerobic reactor is provided with a sludge standing reactor which is used for releasing phosphorus in the excess sludge by adopting the anaerobic reaction method; and a struvite nitrogen-phosphorus recovering device is used for receiving phosphorus elements in the excess sludge through a magnesium ammonium phosphate crystal (struvite). The recovery device is simple to operate, remarkable in phosphorus releasing effect, stable to run, and relatively low in cost.
Owner:SUN YAT SEN UNIV
Method for treating wastewater containing nitrogen and phosphorus and synthesizing magnesium ammonium phosphate
ActiveCN110127829AEasy to handleUniform particle sizeWater contaminantsWater/sewage treatment with mechanical oscillationsFluidized bedNitrogen
The invention provides a method for treating wastewater containing nitrogen and phosphorus and synthesizing magnesium ammonium phosphate. The method comprises the following steps: adding seed crystalsinto a fluidized bed, and controlling the wastewater flow rate to enable the seed crystals to be fluidized; adjusting the pH value in the fluidized bed to an alkaline condition; adding magnesium liquid, starting reflux water, increasing the water temperature, and continuously introducing wastewater to enable the wastewater and the magnesium liquid to continuously react in the fluidized bed; reducing the water temperature, inserting the ultrasonic vibrating rod into the fluidized bed, turning on an ultrasonic vibrating rod, carrying out ultrasonic reaction, increasing the flow rate of backflowwater, turning off the ultrasonic vibrating rod, and carry out the reaction continuously; and after the reaction is finished, discharging the treated wastewater and the generated magnesium ammonium phosphate crystal precipitate. The crystal generated by the method is more regular in shape, short in reaction time and high in nitrogen and phosphorus removal rate, and the generated magnesium ammonium phosphate crystal is uniform and regular in particle size.
Owner:NANCHANG HANGKONG UNIVERSITY
Method for recycling nitrogen and phosphorus from biogas slurry in pig farms
InactiveCN103523886APromote growthReduce processing costsWater/sewage treatmentFertilizer mixturesPig farmsSlurry
The invention relates to a method for recovering nitrogen and phosphorus from biogas slurry from pig farms. The method comprises the following steps of: adding a certain amount of magnesium ammonium phosphate crystal into papermaking white clay to modify the papermaking white clay; adding the modified papermaking white clay into biogas slurry in which neutralization and chemical precipitation reaction are carried out; and thus, removing the nitrogen and phosphorus from the biogas slurry in form of precipitate. The method can reduce treatment cost. The precipitate contains rich organic matters and nutrients needed by plants for growth such as nitrogen and phosphorus, and can be used to make organic compound fertilizers for promoting the growth of the plants. The method changes waste into valuable materials.
Owner:CHANGZHOU UNIV
Novel anaerobic sewage deep phosphorus and nitrogen removal rotation fluidized bed processing method
InactiveCN103204583ALow running costAchieve protectionTreatment with anaerobic digestion processesSludgeHydrolysis
The invention relates to a novel anaerobic sewage deep phosphorus and nitrogen removal rotation fluidized bed processing method, and belongs to the technical field of the environmentally-friendly sewage processing and recycling technologies. An apparatus for realizing the method comprises an anaerobic hydrolysis pool device, and a novel anaerobic sewage deep phosphorus and nitrogen removal rotation fluidized bed device. The method is characterized in that the method comprises the following steps: discharging a supernatant and a sludge dehydration liquid to the anaerobic hydrolysis pool device, reacting for about 3h, removing nitrogen and some metal salts, allowing the obtained reacted sewage to flow to the novel anaerobic sewage deep phosphorus and nitrogen removal rotation fluidized bed device as inlet water, and carrying out a series of chemical precipitation and crystallization reactions through the novel anaerobic sewage deep phosphorus and nitrogen removal rotation fluidized bed device. The method can deeply remove phosphorus and nitrogen in sewage and converts phosphorus and nitrogen dissolved in water to magnesium ammonium phosphate crystals insoluble in water in order to reach a sewage processing effect.
Owner:谭艾幸 +2
Method for recovering ammonia nitrogen in wastewater
InactiveCN104817154ASolve the problem of declining removal rateSolve the costWater contaminantsWater/sewage treatmentPhysical chemistryAmmonia
The present invention discloses a method for recovering ammonia nitrogen in wastewater, and belongs to the field of wastewater treatment. The steps comprise: dissolving the recovered magnesium ammonium phosphate solid in an acid solution to obtain a magnesium ammonium phosphate solution with a certain mass fraction; injecting the obtained magnesium ammonium phosphate solution into the separation pole chambers of an electrodialysis system to carry out anion and cation separation, and treating according to a certain operating parameters; after completing the treating, pouring the products of the anode chamber and the cation chamber to wastewater according to a certain ratio to obtain magnesium ammonium phosphate crystal precipitate so as to achieve the purpose of removal of ammonia from the wastewater; and recovering the magnesium ammonium phosphate crystal, dissolving in an acid solution to prepare the magnesium ammonium phosphate solution with a certain mass fraction, injecting into the pole chambers to carry out the separation treatment, and pouring the products of the anode chamber and the cation chamber to the wastewater to circularly remove the ammonia after completing the treating. With the method of the present invention, the problem of the high agent cost of the magnesium ammonium phosphate method can be effectively solved, and the difficult problem that the ammonia nitrogen removal rate is reduced along with the increase of the number of the magnesium ammonium phosphate circulation ammonia removal is solved.
Owner:KUNMING UNIV OF SCI & TECH
Phosphorus recovery crystallization reactor and phosphorus recovery method
ActiveCN101602535BHigh recycling efficiencyLow costPhosphorus halides/oxyhalidesWater/sewage treatmentRecovery methodHigh concentration
A phosphorus recovery crystallization reactor and a phosphorus recovery method, the reactor is a structure of inner and outer double cylinders, the inner cylinder is located at the center of the outer cylinder of the reactor, and the reactor includes: an aeration stripping zone, a crystallization reaction zone , a precipitation separation area, a high-concentration phosphorus sludge area, and a buffer zone; wherein, the crystallization reaction area and the precipitation separation area are connected through the upper part of the buffer zone, so that the sewage after the crystallization reaction in the crystallization reaction area enters the precipitation The separation area does not affect the high concentration phosphorus sludge area. The present invention fully benefits the effective components in the anaerobic treatment of high-concentration livestock and poultry wastewater, improves the pH value of the anaerobic effluent by means of aeration and blow-off, utilizes the higher concentration of phosphorus and ammonia nitrogen in the livestock and poultry wastewater, and passes the phosphorus through Magnesium ammonium phosphate is removed in the form of crystals, and the removal rate of total phosphorus can reach 50-60%, without adding any chemical agents. The recovered phosphorus is in the form of crystals, which is beneficial to the utilization of recovered phosphorus.
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
Method for recovering nitrogen and phosphorus from biogas slurry from pig farms
InactiveCN102898213APromote growthReduce processing costsFertilizer mixturesPig farmsSimple Organic Compounds
The invention relates to a method for recovering nitrogen and phosphorus from biogas slurry from pig farms. The method comprises the following steps of: adding a certain amount of magnesium ammonium phosphate crystal into papermaking white clay to modify the papermaking white clay; adding the modified papermaking white clay into biogas slurry in which neutralization and chemical precipitation reaction are carried out; and thus, removing the nitrogen and phosphorus from the biogas slurry in form of precipitate. The method can reduce treatment cost. The precipitate contains rich organic matters and nutrients needed by plants for growth such as nitrogen and phosphorus, and can be used to make organic compound fertilizers for promoting the growth of the plants. The method changes waste into valuable materials.
Owner:CHANGZHOU UNIV
Method for removing phosphorus from sewage on basis of magnesium alloy corrosion
The invention discloses a method for removing phosphorus from sewage on the basis of magnesium alloy corrosion. The method comprises the steps of immersing a magnesium alloy plate containing a certainmass of magnesium in wastewater rich in nitrogen and phosphorus, and recovering precipitated magnesium ammonium phosphate after a period of time. Since equilibrium potential (-2.37V) is relatively low, a magnesium metal is very easily corroded and dissolved out in an aqueous solution system; and magnesium ions required by crystallization of magnesium ammonium phosphate are provided by the slow corrosion of the magnesium alloy and react with ammonium and phosphate pre-existing in the wastewater to generate a magnesium ammonium phosphate crystal for resource recycling of phosphorus and nitrogen.
Owner:深圳市中涛环保工程技术有限公司
Method for preventing fermented bean curd from generating white crystal sediment
InactiveCN103229854AThe method is simple and applicableCheese manufactureFood scienceBiotechnologyAcetic acid
The invention relates to a method for preventing fermented bean curd from generating white crystal sediment, belonging to the technical field of food processing. Control on crystallization of magnesium ammonium phosphate in fermented bean curd fermentation liquor is realized through two methods as follows: one method is that crystallization of magnesium ammonium phosphate is prevented by adjusting the acidity (pH is less than or equal to 6.0) of a reaction medium through lactic acid or acetic acid; the other method is that crystallization of magnesium ammonium phosphate is prevented by adding a metal complexing agent, wherein adjustment through acetic acid is most ideal; pH is adjusted to 6.0 by using acetic acid; the acetic acid not only is an acid agent for adjusting pH but also is a complexing agent; and the method disclosed by the invention is simple and good in effect and is capable of ensuring that fermented bean curd products cannot generate magnesium ammonium phosphate crystal sediment in the period of more than ten months during the shelf life.
Owner:GUIZHOU UNIV
Resourceful treatment and utilization method of ardealite leachate
InactiveCN113336356AReduce pollutionEmission reductionWater contaminantsTreatment involving filtrationOXALIC ACID DIHYDRATEWater treatment
The invention discloses a resourceful treatment and utilization method of ardealite leachate, which comprises the steps of adding hydroxide into the ardealite leachate to adjust the pH value to 4-5, stirring and reacting to remove part of metal ions and impurities in the solution, and filtering to remove precipitates; adding oxalic acid into the obtained filtrate, adjusting the pH value of the solution to 6 with hydroxide, carrying out a stirring reaction to enable calcium ions to react with oxalic acid to generate calcium oxalate, and filtering to remove precipitates; introducing the obtained filtrate into a fluidized bed induced crystallization reactor, adjusting the pH value to 8-10 with a hydroxide solution, adding ammonia nitrogen wastewater and magnesium oxide for a reaction, and obtaining high-purity magnesium ammonium phosphate crystal obtained through filtering and drying; carrying out membrane treatment on the obtained filtrate to remove the fluorine element; carrying out stirring reaction on the obtained filtrate and a traditional Chinese medicine residue adsorption material to remove the arsenic element; and carrying out tail water treatment on the obtained filtrate to enable the filtrate to reach the emission standard.
Owner:WUHAN INSTITUTE OF TECHNOLOGY +1
Mongolian veterinary drug fodder additive for preventing and treating sheep urinary calculus and preparation method and application thereof
InactiveCN110338284ARelieve clinical symptomsReduce the number of crystalsAnimal feeding stuffPteridophyta/filicophyta medical ingredientsSide effectVeterinary Drugs
The invention discloses a Mongolian veterinary drug fodder additive for preventing and treating sheep urinary calculus and a preparation method and application thereof. The method includes the steps of drying Japanese climbing fern spores, radix phlomii, herba lysimachiae, fructus tribuli, fructus malvae vertillatae, fructus amomi rotundus, radix asparagi, fructus piperis longi, pomegranates, white sal ammoniac, mirabilite, oxytropis coerulea, herba dracoophalun mololariea, radix sophorae flavescentis, cortex cinnamomi, radix aucklandiae, semen myristicae, radix et rhizoma rhei and radix scutellariae, then pulverizing and sieving the components above, uniformly mixing the components, adding a prepared Mongolian veterinary drug into a premixed basic ration for healthy sheep, and meanwhile,allowing the sheep to freely forage and drink water. The Mongolian veterinary drug fodder additive can better prevent and treat sheep urinary calculus, and the urine of all male sheep is weakly alkaline according to the pH detection values after the sheep eat the veterinary drug fodder additive; moreover, it is found in urinary sediment microscopic examination of the male sheep that the quantity of magnesium ammonium phosphate crystals is gradually reduced, the size of the magnesium ammonium phosphate crystals is reduced, the effects of diuresis and calculus removal are achieved, and the clinical symptoms of the male sheep are relieved. Meanwhile, toxic and side effects and drug residues of various chemical drug fodder additives are reduced or avoided, and green, high-quality and healthy development of livestock products is ensured.
Owner:INNER MONGOLIA AUTONOMOUS REGION ACAD OF AGRI & ANIMAL HUSBANDRY SCI
Artificial wetland microbial fuel cell sewage treatment device
PendingCN113336313AHigh crystal purityGood removal effectTreatment by combined electrochemical biological processesAlkali orthophosphate fertiliserConstructed wetlandMagnesium ion
The invention discloses a light energy reinforced phosphorus recovery electrolytic bath-artificial wetland microbial fuel cell sewage treatment device. The light energy reinforced phosphorus recovery electrolytic bath-artificial wetland microbial fuel cell sewage treatment device comprises an inflow water distribution tank, a phosphorus recovery electrolytic tank, an artificial wetland-microbial fuel cell, an outflow water collection tank, a light energy acquisition system and an electric energy management system. The light energy reinforced phosphorus recovery electrolytic bath-artificial wetland microbial fuel cell sewage treatment device converts light energy / biomass energy into electric energy, the electric energy is stored and distributed to the phosphorus recovery electrolytic bath through the electric energy management system, magnesium ions are slowly released by an anode of the electrolytic bath, magnesium ammonium phosphate crystals are separated out by a cathode of the electrolytic bath, and phosphorus in sewage is recovered. Meanwhile, the pollutant removal effect is improved. According to the invention, the problems of poor pollutant removal effect and incapability of recycling phosphorus resources in the traditional artificial wetland are solved, and a novel sewage treatment technology with zero energy consumption, high efficiency and environmental friendliness is formed.
Owner:CHONGQING UNIV +1
Method for simultaneous removal of nitrogen and phosphorus
ActiveCN108178249ASave on medicine costsSynchronous removalWater contaminantsPhosphorus compoundsElectrolysisPhosphate
Owner:JINGDEZHEN CERAMIC UNIV
Treatment and recovery process for alkaline etching wastewater
InactiveCN110790427ALess investmentReduce manufacturing costWater treatment parameter controlWater contaminantsSewageAlkaline etching
Owner:JIANGSU FANGSHIYUANLVE SCI & TECH CONSULTING CO LTD
Process for assisting in strengthening phosphorus removal and phosphorus recovery of phosphorus-containing wastewater
InactiveCN111892227AFast crystallizationImprove crystallization efficiencyWater contaminantsTreatment involving filtrationAluminium industryRed mud
The invention discloses a process for assisting in strengthening phosphorus removal and phosphorus recovery of phosphorus-containing wastewater. The process comprises the following steps: adding a proper amount of a magnesium ion solution, precipitating phosphorus in the waste liquid in the form of magnesium ammonium phosphate crystals, adding red mud, enhancing the reaction by using a proper magnetic field, accelerating the crystallization rate of magnesium ammonium phosphate, and finally filtering and drying the obtained precipitate to obtain the final product. The process disclosed by the invention is short in reaction time, can optimize the problems of long time and incomplete treatment in the existing treatment of the phosphorus-containing waste liquid, and meanwhile, utilize the solid waste, namely the red mud, discharged from the aluminum production industry, so that the process has important economic benefits and social significance for reducing the treatment cost, solving theproblems that the waste liquid is difficult to treat and the like.
Owner:NANCHANG HANGKONG UNIVERSITY
Flue gas desulfurization method and system based on ammonia-magnesium combined reinforced phosphoric ore pulp method
InactiveCN111437712AImprove desulfurization effectPromote leaching reactionGas treatmentDispersed particle separationFlue gasPhosphoric acid
The invention discloses a flue gas desulfurization method and system based on an ammonia-magnesium combined reinforced phosphoric ore pulp method. The method comprises the following steps: S1, ammoniawater and magnesium oxide are added into phosphoric ore pulp to prepare mixed slurry; S2, flue gas containing SO2 and the sprayed mixed slurry are subjected to a contact reaction to remove SO2 in theflue gas; and S3, the flue gas is discharged after being washed by the slurry, oxygen is introduced into the reacted mixed slurry for reaction, then the mixed slurry is sent back to the step S2 to continue to wash the flue gas, and when the solubility of magnesium ammonium phosphate in the mixed slurry meets a preset requirement, the mixed slurry is sent to a crystallizer to produce magnesium ammonium phosphate crystals. According to the invention, the high desulfurization capacity of ammonia, magnesium and phosphoric ore pulp is utilized, and the advantages of sulfur dioxide absorption capacity of the ammonia, the magnesium and the phosphoric ore pulp and process optimization are combined, so as to promote the sulfuric acid leaching reaction of phosphate ore and enhance the desulfurization effect of the phosphoric ore pulp; and before burdening, organic acid is added when the mixture is ground to be fine, through the mechanochemical activation effect, the coordination complexation effect with calcium can be enhanced, crystal lattices are destroyed, and sulfur dioxide removal is accelerated.
Owner:KUNMING UNIV OF SCI & TECH
Device and method for recycling nitrogen and phosphorus from waste water of digestion tank
ActiveCN106517667ASolve the problem of single form and low processing efficiencySimultaneous nitrogen and phosphorus removalMultistage water/sewage treatmentPhosphorus compoundsResource utilizationDigestion
The invention relates to a device and a method for recycling nitrogen and phosphorus from waste water of a digestion tank, and belongs to the technical field of waste water disposal. An integrated device consists of an overflow pond, a pretreatment pond, a multifunctional inspection well and a crystalizing reaction pond. The method includes steps that sewage enters a digestion tank processing system through a discharge pipe, wherein the sewage firstly enters the pretreatment pond through a grid, and sludge is sunken, gas generated from reaction and fermentation is discharged or recycled from the gas outlet, and liquid supernatant of sewage reaches the lowest water line of the water outlet and enters the crystalizing reaction pond through the pipeline. Sewage entered the crystalizing reaction pond enters the crystalizing reaction pond firstly through interception of a light filter layer and the degrading function of attached microorganisms, magnesium chloride and alkaline solution are added as assistance, thus sewage overflow forms magnesium ammonium phosphate crystal greatly and then recycled; the treated sewage is flowed to a municipal sewage pipe network. If water amount is suddenly increased or the pretreatment pond has sudden fault, sewage directly enters the overflow pond and flows into the municipal sewage pipe network. The sewerage treatment ability of the digestion tank is strong, nitrogen and phosphorus nutrients can be recycled; besides, sewage treatment and resource utilization of sewage and sludge at the same time can be realized; thus the nitrogen and phosphorus load of sewage plant can be effectively reduced; the novel resource processing technology can meet the sustainable development requirement.
Owner:UNIV OF JINAN
Method for recycling ammonia and nitrogen in waste watery by aid of chemicrystallization
ActiveCN102674523BLow costIncrease release rateWater/sewage treatmentAmmoniacal nitrogenNitrogen removal
Owner:NANJING UNIV
A method and system for treating high ammonia nitrogen wastewater
ActiveCN107244726BImprove processing efficiencyHigh removal rateWater treatment compoundsWater contaminantsMagnesium saltPhosphate
The invention discloses a method and system for treating high ammonia-nitrogen wastewater. By taking effluent water containing high ammonia nitrogen content after anaerobic fermentation as influent water and taking a phosphate and magnesium salt mixed solution as an auxiliary solution, a liquid-liquid hypergravity reactor is utilized to enhance the mass transfer effect during mixing of the two liquid phases; crystallized and settling magnesium ammonium phosphate crystals are collected at the bottom of the reactor by means of the reaction-settlement integrated hypergravity reactor while the two liquid phases react; the liquid phases after the reaction overflow at the top of the reactor to produce effluent water; and the magnesium ammonium phosphate crystals are discharged at the bottom of the reactor.
Owner:中工环境科技有限公司
Urine sewage nitrogen and phosphorus recovery and purification treatment device and method
PendingCN114380460ARealize recycling valueAvoid polluting loads from enteringWater contaminantsDispersed particle separationDistillationSewage
The invention provides a urine sewage nitrogen and phosphorus recovery and purification treatment device and method, and belongs to the technical field of sewage treatment, the urine sewage nitrogen and phosphorus recovery and purification treatment device comprises a hydrolysis tank for collecting urine, the hydrolysis tank is communicated with a reduced pressure distillation tower, the reduced pressure distillation tower is communicated with a dissolving tank and a sedimentation tank, the dissolving tank is communicated with a vacuum pump, and the sedimentation tank is communicated with an MBR reactor. The hydrolysis pool is used for collecting, storing and hydrolyzing urine resources; the reduced pressure distillation tower is used for realizing separation of nitrogen resources in the hydrolyzed urine, and recycling of nitrogen and phosphorus resources is completed by connecting the sedimentation tank and the dissolving tank; and the MBR is used for removing residual nitrogen and organic matters after the urine resources are recycled. According to the invention, the nitrogen load of a downstream sewage treatment plant is reduced, the carbon-nitrogen ratio is increased, and the treatment cost is saved; rapid and efficient ammonia separation is realized, and efficient recovery of ammonia gas is realized by virtue of a sulfuric acid solution; the heat loss is reduced, and the energy consumption is reduced; the recovered ammonium sulfate crystal and magnesium ammonium phosphate crystal have the advantages of few impurities, single component and higher purity.
Owner:BEIJING JIAOTONG UNIV
Preparation method and application of filter chamber filter material replacing struvite mineral
ActiveCN104016459AAchieve removalAchieve recyclingWater/sewage treatment by flocculation/precipitationPorosityEconomic benefits
The invention relates to a preparation method and application of a filter chamber filter material replacing struvite mineral, and belongs to the technical field of wastewater treatment. The method comprises the following steps: with porous ceramisite with largish grain size as a carrier, and culturing a layer of magnesium ammonium phosphate crystals on the surface of the carrier by using heterogeneous and secondary nucleation effects under a certain condition so as to prepare the practical struvite filter material capable of being applied to engineering. The porous ceramisite is light in weight, good in chemical stability, enough in mechanical strength, large in porosity, large in specific area, strong in adsorption capability and relatively long in price, the porous ceramisite is cultured to prepare the struvite filter material, and has enormous market potential and economic benefit.
Owner:华昕设计集团有限公司
Resource recycling municipal sewage treatment device and process
PendingCN108423886AReduce usageSludge treatment by de-watering/drying/thickeningSludge treatment by pyrolysisGratingSodium phosphates
The invention discloses a resource recycling municipal sewage treatment device and process and belongs to the technical field of municipal sewage treatment. The resource recycling municipal sewage treatment device comprises a grating, a collecting tank, a lift pump, a primary settling tank, a secondary settling tank, a pyrolysis tank, a water ejector, a circulating pump, an ammonia tank and the like. The process specifically comprises enabling sewage to flow through the grating for suspended solid pretreatment and then into the collecting tank for being lifted into the primary settling tank bythe lift pump for flocculation and absorption reaction, and then overflowing the reacted sewage into the secondary settling tank; feeding disodium hydrogen phosphate and magnesium chloride to form magnesium ammonium phosphate crystal for settlement, then conveying magnesium ammonium phosphate slurry into the pyrolysis tank, feeding sodium hydroxide to regulate pH to 11, and controlling the temperature to be 85-95 DEG C; by means of the circulating pump, enabling the water ejector to produce negative pressure to absorb ammonia gas, and through a magnesium sodium phosphate pump, lifting magnesium sodium phosphate solution produced in the pyrolysis tank into the second settling pond for recycling. The resource recycling municipal sewage treatment device and process can recycle resources to produce biomass fuel raw materials and ammonia, and through circulation of agent, reduce the application amount of agent.
Owner:刘壮
A device and method for recovering nitrogen and phosphorus from septic tank wastewater
ActiveCN106517667BSimultaneous nitrogen and phosphorus removalEasy to recycleMultistage water/sewage treatmentPhosphorus compoundsResource utilizationFermentation
Owner:UNIV OF JINAN
A kind of preparation method and application of filter material for replacing struvite ore
ActiveCN104016459BAchieve removalAchieve recyclingWater/sewage treatment by flocculation/precipitationPorosityEconomic benefits
Owner:WUXI MUNICIPAL DESIGN INST
Pipeline scale removal device
InactiveCN111299268ACrystallization EfficientLow costHollow article cleaningSewage treatmentMechanical engineering
The invention discloses a pipeline scale removal device. The pipeline scale removal device is installed on a first pipeline. A first hand valve is arranged in a first inlet, and a second hand valve isarranged in a first outlet. The pipeline scale removal device comprises a second pipeline. The second pipeline comprises a second outlet, a second inlet, a third hand valve, a first water pump, a cleaning fluid buffering tank and a fourth hand valve. The second outlet communicates with the first pipeline and is located behind the first hand valve. The second inlet communicates with the first pipeline and is located in front of the second hand valve. An outlet of the third hand valve communicates with the outlet of the second pipeline. An outlet of the first water pump communicates with an inlet of the third hand valve. An outlet of the cleaning fluid buffering tank communicates with an inlet of the first water pump. The cleaning fluid buffering tank comprises an acid addition opening, a water addition opening and a filter. The acid addition opening is connected with an acid addition device, the water addition opening is connected with a water addition device, and an outlet of the filter communicates with an inlet of the cleaning fluid buffering tank. An inlet of the fourth hand valve communicates with the second inlet, and an outlet of the fourth hand valve communicates with an inlet of the filter. The technical effects that the pipelines do not need to be replaced, magnesium ammonium phosphate crystals in the sewage treatment pipelines are efficiently removed, and the cost islow are achieved.
Owner:河北首朗新能源科技有限公司
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