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34 results about "Ammonia assimilation" patented technology
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Ammonia assimilation. am·mo·ni·a as·sim·i·la·tion. the use of ammonia (or ammonium ions) in the net synthesis of nitrogen-containing molecules, for example, glutamine synthetase. Synonym(s): ammonia fixation.
Use Of An Ammonia Storage Device In Production Of Energy
InactiveUS20070207351A1Reactant parameters controlMagnesium halidesAlkaline earth metalAmmonia storage
An electric power generating unit comprising (i) an ammonia storage device in the form of a container comprising an ammonia absorbing and releasing salt of the general formula: Ma(NH3)nXz, wherein M is one or more cations selected from alkali metals, alkaline earth metals, and transition metals such as Li, K, Mg, Ca, V, Cr, Mn, Fe, Co, Ni, Cu or Zn, X is one or more anions selected from fluoride, chloride, bromide, iodide, nitrate, thiocyanate, sulphate, molybdate, phosphate, and chlorate ions, a is the number of cations per salt molecule, Z is the number of anions per salt molecule, and n is the coordination number of 2 to 12. (ii) means for heating said container and ammonia absorbing and releasing salt for releasing ammonia gas and (iiia) a fuel cell for converting ammonia directly into electric power; or (iiib1) a reactor for dissociating ammonia into hydrogen and nitrogen and (iiib2) a fuel cell for converting hydrogen into electric power is useful for large stationary energy producing facilities, but also for use for is useful for large stationary energy producing facilities, but also for use for small rechargeable and / or replaceable power supply units for micro-fabricated or miniaturized ammonia decomposition reactors for use in mobile units and portable devices may be used for large energy producing facilities, and by use of small rechargeable and / or replaceable ammonia storage decomposition reactors, it is also possible to provide energy for mobile units and portable devices.
Owner:AMMINEX
Efficient energy-saving coupling stripping deamination equipment and method
ActiveCN102030386AReduce ammonia nitrogen contentWater/sewage treatment by degassingEvaporationEngineering
The invention discloses efficient energy-saving coupling stripping deamination equipment and method. The equipment mainly comprises an I-effect evaporator, an II-effect evaporator, an inlet / outlet heat exchanger, a stripping deamination tower, an ammonia absorption tower and a circulation pump. The method comprises the following steps: heating the ammonia-nitrogen wastewater through the inlet / outlet heat exchanger and then feeding the heated ammonia-nitrogen wastewater into the stripping deamination tower; performing stripping deamination by utilizing circulating steam and fresh steam; feeding the ammonia steam contained in the top of the stripping deamination tower into the ammonia absorption tower by a steam circulator; absorbing the ammonia in the circulating steam by utilizing sulfuric acid to obtain ammonium sulfate solution; returning the purified steam to the stripping deamination tower for cyclic use; and feeding the ammonium sulfate solution to a double-effect evaporation section, and heating the ammonium sulfate solution by utilizing the fresh steam serving as a heat source for evaporation, obtaining solid ammonium sulfate, wherein the steam obtained by evaporating the ammonium sulfate solution in the II-effect evaporator is returned to a steam circulation efficient stripping deamination section by a steam conveyer and used as deamination steam. Through the invention, the wastewater with high ammonia nitrogen content can be treated, the ammonia nitrogen content in the discharged wastewater after treatment is low, and the steam consumption is low.
Owner:BEIJING UNIV OF CHEM TECH
Phenol-amine wastewater treatment and recycling method and device
ActiveCN102107988AReduce concentrationEasy to handleMultistage water/sewage treatmentTreatment effectUltrafiltration
The invention discloses a phenol-amine wastewater treatment and recycling method and device. The device comprises a water collection tank, a primary settling tank, an adjusting tank, a stripping and ammonia absorption system, an A / A / O-the MBR reaction tank, a biochar hydrolysis, nitrification and fluidization system and an immersed ultrafiltration system which are connected in series according tothe flow of the wastewater treatment. The device of the invention adopts the method combining the main physicochemical technology and the auxiliary biochemical technology, thus effectively reducing the operating cost, wherein the physicochemical technology is mainly used to reduce the concentration of ammonia nitrogen, remove suspended matter (SS) and insoluble, slightly soluble and refractory CODcr and increase the B / C ratio; and the biochemical technology is mainly used to remove CODcr and BOD5 and reduce the chroma. The device of the invention has very good treatment effect on the wastewater with high ammonia nitrogen and high phenolic compounds; and the treated wastewater meets the discharge standards and can be directly discharged or further treated for reuse, thus saving the energy.
Owner:SHANGHAI KANGSHENG ENVIRONMENTAL PROTECTION ENERGY TECH
Ammonia-process desulfurization method and device for chamber-division ammonification
ActiveCN107213769ASolve processing problemsImprove ammonia utilizationGas treatmentDispersed particle separationPhysical chemistryAmmonia
The invention discloses an ammonia-process desulfurization method for chamber-division ammonification. The method is characterized in that an oxidation section comprises an oxidation chamber and an ammonification chamber which are in mutual fluid communication, and an ammonia absorbing agent is added into the ammonification chamber. Preferably, an absorption-oxidation cycle of the method comprises a liquid cycle between the oxidation chamber and a secondary spraying absorption section and a liquid cycle between the ammonification chamber and a primary spraying absorption section, and the mutual series flow of the two cycles is realized at least through fluid communication between the oxidation chamber and the ammonification chamber. The invention further discloses a device for implementing the method.
Owner:JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
Method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and device
ActiveCN102530990AAchieve emissionsSolve environmental problems of emissionsHydrogen separation using solid contactAmmonia preparation/separationLiquid wasteWastewater
The invention relates to a method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and a production device thereof, and the method comprises treatment in the following three units in order: 1) treatment in a high pressure purge gas membrane separation hydrogen recovery unit; 2) treatment in a low pressure purge gas membrane separation hydrogen recovery unit; 3) treatment in an ammonia water rectification unit. The unit 1) and the unit 2) recover hydrogen and generate ammonia water, and the unit 3) recovers liquid ammonia form the ammonia water, and recycles the rectification kettle liquid as water for ammonia absorption. The invention provides a hydrogen ammonia recovery integrated solution scheme for synthetic ammonia industry; compared with hydrogen ammonia ammonia recovery by traditional simple constant pressure recovery methods, membrane separation methods or ammonia water rectification methods, the method of the invention overcomes the problem of incomplete recovery coverage area and the problem of harmful waste liquid waste gas discharge; during hydrogen ammonia recovery, the discharge of ammonia containing waste water is reduced to zero; and the target of maximization of economic benefits and environmental protection benefits is realized.
Owner:TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
Process and device for producing strong ammonia water through negative pressure operation
ActiveCN106673012AIncrease concentrationReduce material requirementsAmmonia preparation/separationGas phaseChemical products
The invention discloses a process and a device for producing strong ammonia water through negative pressure operation, and belongs to a coking chemical product recovery technology. Ammonia steam from an ammonia steaming tower dephlegmator is cooled by a condenser to be partially condensed, condensed liquid is discharged to the bottom of an ammonia recovering tower through the gravity action, and the non-condensed ammonia steam and noncondensable gas are pumped by a dry vacuum pump to generate negative pressure; the gas phase pumped through the dry vacuum pump is heated and pressurized to enter the ammonia recovering tower, ammonia removal is conducted by circulating ammonia water cooled externally, and the recovery rate of the ammonia is 90 to 95 percent; the noncondensable gas at the top of the ammonia recovering tower and containing a small amount of ammonia is directly discharged into a gas pipeline in front of an ammonia absorbing device or an ammonia process oxidation desulfurization device, and a strong ammonia water product with the mass concentration being 15 to 25 percent is obtained at the bottom of the tower; the process can meet negative pressure ammonia steaming operation with various vacuum degrees, and has the advantages of small equipment investment, low energy consumption, simple flow, low operation cost, no environmental pollution and the like.
Owner:ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
Method for accelerating synthesis of L-arginine through enhancing ammonia assimilation
ActiveCN106191152ACarbon-nitrogen lyasesMicroorganism based processesEscherichia coliGlutamine synthase
The invention provides a method for accelerating the synthesis of corynebacterium crenatum L-arginine through enhancing ammonia assimilation. Specifically, the yield of the corynebacterium crenatum SDNN403 L-arginine can be effectively improved through excessive co-expression of a glutamine synthase coding gene glnA and a glutamate dehydrogenase coding gene gdh of a key enzyme corynebacterium crenatum source of an ammonia assimilation way, and an aspartase coding gene aspA of an escherichia coli source in the corynebacterium crenatum SDNN403.
Owner:JIANGNAN UNIV
Method for recovering hydrogen and ammonia in synthetic ammonia exhausted gas
ActiveCN103663367AGuaranteed uptimeGuaranteed recyclingHydrogen separation using solid contactAmmonia preparation/separationHydrogenDistillation
The method discloses a method for recovering hydrogen and ammonia in synthetic ammonia exhausted gas. The method comprises a pretreatment process, a membrane separation process and an ammonia recovering process; and an ammonia resistant membrane which can tolerate an ammonia gas phase with concentration lower than 6% (v / v) for a long time is adopted to treat the synthetic ammonia exhausted gas, hydrogen and most ammonia in the synthetic ammonia exhausted gas are recovered, and then ammonia contained in retention gas after membrane separation is recovered with methods of water washing and ammonia distillation and changed into a liquid ammonia product. According to the method for recovering hydrogen and ammonia in the synthetic ammonia exhausted gas, safe and stable operation of the membrane separation process is guaranteed essentially, and more than 85% of hydrogen and more than 75% of ammonia can be recovered; equipment investment and occupied land involved in the ammonia recovering process are reduced by 60%; and meanwhile, energy consumption of an ammonia absorption tower and an ammonia still is reduced by 70%-80%, and the operation cost is reduced by 70%-80%.
Owner:DALIAN EUROFILM IND
Coupling control method for removing SO2 and NOx by wet ammonia absorption method applied to comprehensive energy
PendingCN110935303AGood effectOffset interferenceGas treatmentDispersed particle separationControl engineeringProcess engineering
The invention provides a coupling control method for removing SO2 and NOx by wet ammonia absorption method applied to comprehensive energy. The method includes: the practical ammonia supplement quantity, during a pH value control process, is regulated by the decoupling coefficient in a decoupling module and then is added to a desulfuration control step; when the ammonia quantity target set value is changed, pre-adjustment on the circulating quantity of absorption solution is conducted so as to counteract a part of interference, and the parameters during the process are more stable, thus maintaining the system reliability. In the invention, a sectional decoupling scheme is designed, wherein corresponding decoupling coefficients are set according to different input quantity of ammonia in a spray diffusion column, wherein the coefficients are switched in the operation process, thus achieving the sectional decoupling control. The ammonia addition quantity in the practical production is divided into three ranges, wherein the decoupling coefficients corresponding to the three ranges are obtained through tests, and corresponding decoupling coefficient is selected according to the range ofthe present ammonia quantity for regulation, thereby improving control precision.
Owner:CECEP INDAL ENERGY CONSERVATION
Ammonia absorber
InactiveCN102092742AStrong ability to resist load fluctuationsAmmonia preparation/separationStructural engineeringEnvironmental engineering
An ammonia absorber comprises a shell-and-tube ammonia absorber shell and channel boxes on both ends, wherein one channel box on one end is provided with a circulating water inlet and a circulating water outlet; the shell is provided with a stronger ammonia water outlet at the bottom, tube sheets on both ends and a tube bundle. The ammonia absorber is characterized in that ammonia inlets are arranged on both sides of the shell; ammonia uniform distribution plates are arranged at the ammonia inlets which are on both sides of the shell; evenly distributed gas inlet micropores are arranged on the uniform distribution plates; the upper part of the shell is provided with a longitudinal water distributor with a water inlet, the lower part of the longitudinal water distributor is connected with evenly distributed water distribution holes on the upper part of the shell through water distribution pipes, a spraying plate is arranged below the water distribution holes in the shell; and evenly distributed micropores are arranged on the spraying plate. The invention has the advantage that the spraying plate which is arranged longitudinally and ensures that the height of the spraying liquid column is constant, is adopted, thus spraying is uniform and stable and the capability of resisting the fluctuation of load is high, and ammonia passes through profiled channels to ensure that the absorption efficiency is up to 100%.
Owner:卢秉威
High temperature-resistant bacterium for promoting ammonia assimilation function in sludge composting process
The invention relates to high temperature-resistant bacterium for promoting ammonia assimilation function in the sludge composting process. The high temperature-resistant bacterium is bacilluse mojavensis P2, and is preserved in China General Microbiological Culture Collection Center; the collection number is CGMCC NO. 14980. The high temperature-resistant bacterium has the advantages that the ammonium ions in sludge can be assimilated, the generation amount and volatilization amount of ammonia gas in the sludge are reduced, and the pollution to the environment in the sludge composting processis reduced; the high temperature of 65 DEG C can be resisted.
Owner:INST OF MICROBIOLOGY HEILONGJIANG ACADEMY OF SCI +1
Ammonia-containing waste gas absorption system
PendingCN107715659AIncrease concentrationDirect contact guaranteeGas treatmentDispersed particle separationSoft waterProcess engineering
The invention discloses an ammonia-containing waste gas absorption system which consists of a first absorption tower, a heat exchanger, a first centrifugal pump, a second centrifugal pump, a Venturi mixer, a second absorption tower and a third absorption tower. The first absorption tower, the heat exchanger and the first centrifugal pump form a circulation and cooling system which is capable of greatly increasing the concentration of absorbed ammonia water; water and gas inlets are formed in multiple side lines of the second absorption tower, so that the absorption efficiency and the operationelasticity are improved; particularly due to arrangement of a floating valve tower plate of the second absorption tower, direct contact of a tail gas discharged from the second absorption tower and soft water is ensured, and the fact that the content of ammonia in the tail gas discharged from the tower can be reduced and stabilized can be controlled; a cation exchange resin is adopted as packingof the third absorption tower, a buffer capability is provided for ammonia absorption, and the operation elasticity of the device is improved.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY
Method and device for producing ammonium hydroxide by ammonia synthesis purge gas system
ActiveCN109734104AReduce consumptionEasy to operateChemical industryAmmonia preparation/separationReboilerAmmonium hydroxide
The invention discloses a method and device for producing ammonium hydroxide by an ammonia synthesis purge gas system. The device comprises an ammonia absorption tower, an ammonia stripping tower, anammonium hydroxide tank, an ammonium hydroxide heat exchanger, an ammonium hydroxide water cooler and an ammonium hydroxide reboiler. The ammonia absorption tower is connected with a front-end ammoniasynthesis system and used for absorbing ammonia synthesized by the front-end ammonia synthesis system. The ammonia stripping tower is communicated with the ammonia absorption tower through a first pipeline and a second pipeline, and a circulating pipeline is arranged on the side wall of the ammonia stripping tower. The ammonium hydroxide tank is communicated with the ammonia absorption tower through a third pipeline and used for producing ammonium hydroxide in different concentrations. The ammonium hydroxide heat exchanger is used for heat exchange of substances in the first pipeline and thesecond pipeline. The ammonium hydroxide water cooler is arranged on the first pipeline. The ammonium hydroxide reboiler is arranged on the circulating pipeline. The method and the device have advantages that consumption of medium pressure steam in the purge gas system is reduced, energy saving and consumption reduction are realized, system operation is stabilized, and an ammonium hydroxide productis added.
Owner:CHONGQING JIANFENG CHEM
Continuous glycine synthesis method
ActiveCN111187173ASolve production environmental problemsAvoid the problem of low reaction yieldOrganic compound preparationAmino-carboxyl compound preparationHexamethylenetetramineChloroacetic acids
The invention relates to a continuous glycine synthesis method. The method comprises the following steps: preparing ammonia water; then mixing a chloroacetic acid solution with the ammonia water for asalifying reaction to obtain a solution A; dividing a mixed solution containing urotropin and ammonia water into a plurality of parts, separately adding the plurality of parts of the mixed solution into the solution A, carrying out an ammoniation reaction, and then performing cooling, crystallizing, and separating to obtain a mixed crystal of glycine and ammonium chloride and a mixed crystal mother liquor; taking the mixed crystal mother liquor as a solvent for preparing the ammonia water used in the step (1) or the chloroacetic acid solution used in the step (2); and continuing the reactionto realize continuous synthesis of glycine. According to the invention, a conventional one-step method is divided into three parts, i.e., ammonia dissolution, a salifying reaction and the ammoniationreaction, so a required amount of the ammonia water can be uniformly mixed with feed liquid, the problem of generation of many byproducts caused by local overheating due to ammonia absorption or a toohigh pH value of local feed liquid is avoided, the defects of conventional processes are effectively avoided, glycine yield is increased, and urotropine consumption is reduced.
Owner:TIANJIN TIANDI CHUANGZHI TECH DEV +1
On-line continuous detection device for ammonia in gas using chemical spectrophotometry
ActiveCN111982610BRealization of online continuous detectionResolve detectionWithdrawing sample devicesPreparing sample for investigationVapor–liquid separatorAir pump
Owner:BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG +1
Device and method for in-situ removal of ammonia nitrogen in anaerobic digestion system
ActiveCN108246051BReduce inhibitionEasy to handleGas treatmentDispersed particle separationAmmoniacal nitrogenPeristaltic pump
The invention provides an in-situ device for removing ammonia nitrogen in an anaerobic digestion system, which includes an ammonia removal anaerobic digestion tank and an ammonia absorption-circulation system, and the ammonia absorption-circulation system includes a separation membrane module, an acid An absorption liquid storage bottle and a peristaltic pump, the separation membrane assembly includes a separation membrane and a membrane protection layer arranged outside the separation membrane, the separation membrane assembly is arranged inside the anaerobic digestion tank for ammonia removal; The ammonia anaerobic digestion tank is used to hold the anaerobic digestion feed liquid. The device provided by the invention can realize the in-situ removal of ammonia nitrogen in the anaerobic digestion system, remove ammonia nitrogen while performing anaerobic digestion, reduce the inhibitory effect of ammonia nitrogen, and recover ammonia nitrogen.
Owner:TSINGHUA UNIV
Ammonia water synthesis process
ActiveCN112678845AEasy to operateLow investment costAmmonia preparation/separationSaline waterPlate heat exchanger
The invention relates to an ammonia water synthesis process which comprises the following steps: S1, introducing tail gas containing ammonia gas into the lower end of a gas ammonia absorption tower, starting a delivery pump, introducing desalted water in a desalted water storage tank into the gas ammonia absorption tower by the delivery pump, and absorbing the ammonia gas,wherein the gas ammonia absorption tower is a bubble cap tower with five tower plates, desalted water falls plate by plate after entering the gas ammonia absorption tower and finally enters the lower end of the gas ammonia absorption tower, and the water inlet amount of the desalted water is controlled by liquid level interlocking; S2, cooling the desalted water in the gas ammonia absorption tower by using a circulating pump and an external plate heat exchanger, directly spraying the desalted water back to the upper space of the gas ammonia absorption tower, absorbing ammonia gas, and controlling the flow of the low-temperature desalted water by using temperature at the upper end of the gas ammonia absorption tower in an interlocking manner; and S3, starting an ammonia water pump, and discharging ammonia water at the lower end of the gaseous ammonia absorption tower into an industrial ammonia water storage tank by the ammonia water pump for storage. The ammonia gas in the tail gas can be recycled, waste of the ammonia gas is reduced, operation is easy, and the investment cost is low.
Owner:宁波四明化工有限公司
An automatic ammonia addition system and method applied to an ammonia desulfurization device
Owner:JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
Method for reducing nitrogen loss in municipal sludge composting process
InactiveCN109970471ADoes not inhibit activityReduce escapeBio-organic fraction processingAlkali orthophosphate fertiliserPhosphateSludge compost
The invention relates to the field of urban sludge treatment and provides a method for reducing nitrogen loss in a municipal sludge composting process. The method comprises the following steps that dewatered sludge is uniformly mixed with a phosphate buffer solution, and then a conditioning agent is added for adjusting the water content and mixed uniformly to obtain a mixed material; the uniformlymixed material is subjected to composting treatment, and forced ventilation is carried out for oxygen supply during composting treatment. According to the method, by adding the phosphate buffer solution into the municipal sludge, the nitrogen loss in the composting process is reduced while the degradation rate of organic matter in sludge compost is increased. When an appropriate quantity of the phosphate buffer solution is added into the municipal sludge, the conversion of loose extracellular polymers to the soluble organic matter can be accelerated so that bioavailable carbon in a compost body can be increased. Ammonia assimilation bacteria in the compost body can convert more ammonium nitrogen into organic nitrogen in the presence of more available carbon sources, so that nitrogen is fixed into the compost body, and the nitrogen loss during composting is reduced.
Owner:SHANGHAI JIAO TONG UNIV
Method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and device
ActiveCN102530990BAchieve emissionsSolve environmental problems of emissionsHydrogen separation using solid contactAmmonia preparation/separationLiquid wasteWastewater
The invention relates to a method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and a production device thereof, and the method comprises treatment in the following three units in order: 1) treatment in a high pressure purge gas membrane separation hydrogen recovery unit; 2) treatment in a low pressure purge gas membrane separation hydrogen recovery unit; 3) treatment in an ammonia water rectification unit. The unit 1) and the unit 2) recover hydrogen and generate ammonia water, and the unit 3) recovers liquid ammonia form the ammonia water, and recycles the rectification kettle liquid as water for ammonia absorption. The invention provides a hydrogen ammonia recovery integrated solution scheme for synthetic ammonia industry; compared with hydrogen ammonia ammonia recovery by traditional simple constant pressure recovery methods, membrane separation methods or ammonia water rectification methods, the method of the invention overcomes the problem of incomplete recovery coverage area and the problem of harmful waste liquid waste gas discharge; during hydrogen ammonia recovery, the discharge of ammonia containing waste water is reduced to zero; and the target of maximization of economic benefits and environmental protection benefits is realized.
Owner:TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
A thermostable bacterium that promotes ammonia assimilation during sludge composting
Owner:INST OF MICROBIOLOGY HEILONGJIANG ACADEMY OF SCI +1
A device and method for removing ammonia nitrogen from anaerobic digestion fermentation broth
ActiveCN106219651BGuaranteed repeatabilityEasy to buildDispersed particle separationWater/sewage treatment by degassingAir pumpEnvironmental engineering
Owner:SHANGHAI JIAOTONG UNIV
Device for recovering ammonium and concentrated protein stock solution from ammonia-containing protein stock solution and method thereof
InactiveCN111748012ALow costImprove the purification effectPeptide preparation methodsAmmonium salt fertilisersConcentration proteinPhysical chemistry
The invention discloses a device for recovering ammonium and a concentrated protein stock solution from an ammonia-containing protein stock solution and a method thereof. The device for recovering theammonium from the ammonia-containing protein stock solution and concentrated protein stock solution comprises an adjusting mechanism, a removing mechanism, an ammonia absorption mechanism and an MVRforced circulation concentration mechanism, wherein the adjusting mechanism, the removing mechanism and the MVR forced circulation concentration mechanism are connected in sequence; the ammonia absorption mechanism is connected with the removal mechanism; the adjusting mechanism is used for adjusting the pH value of the ammonia-containing protein stock solution; the removal mechanism is used for converting NH4<+> in the ammonia-containing protein stock solution into NH3 so as to realize removal and obtain a protein stock solution; wherein the ammonia absorption mechanism is used for adsorbingNH3 from the removal mechanism and converting the NH3 into ammonia sulfate, and the MVR forced circulation concentration mechanism is used for concentrating a protein stock solution from the removal mechanism to obtain a high-concentration protein stock solution and distilled water. The device for recovering the ammonium from the ammonia-containing protein stock solution and the concentrated the protein stock solution has the advantages of low cost, good ammonium recovery effect and good protein stock solution purification effect.
Owner:GUANGDONG WENYANG ENVIRONMENTAL TECH CO LTD
Method for treating high ammonia nitrogen wastewater with formaldehyde as ammonia absorber
ActiveCN110697957AReduce the concentration of ammonia nitrogenHigh recycling valueOrganic chemistryWater contaminantsHexamethylenetetraminePolypropylene
This method discloses a method for treating high ammonia nitrogen wastewater with formaldehyde as an ammonia absorber. The method comprises the following steps: a, preparing materials, namely preparing 20L of ammonia nitrogen wastewater after ultrafiltration pretreatment; b, adjusting the pH value, namely adjusting the pH value of the ammonia nitrogen wastewater in heating by using wastewater treatment equipment; c, performing deamination, namely absorbing a dehydrated deamination film by using a formaldehyde solution; and d, performing material discharge, namely classifying and delivering deamination wastewater and urotropine after deamination treatment, wherein the ammonia nitrogen concentration in the ammonia nitrogen wastewater in step a is 300-10000mg / L; the heating temperature in step b is 3-45 DEG C; the pH value of the ammonia nitrogen wastewater is adjusted to 10-12; the deamination film in the step c is a hydrophobic micro-pore film which is made of polypropylene, polyethylene, polyvinylidene fluoride or polytetrafluoroethylene; and the content of formaldehyde in the formaldehyde solution of a certain concentration is 3-8%.
Owner:HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
A method for treating high ammonia nitrogen wastewater with formaldehyde as ammonia absorbent
ActiveCN110697957BReduce the concentration of ammonia nitrogenHigh recycling valueOrganic chemistryWater contaminantsHexamethylenetetraminePolypropylene
The method discloses a method for treating high-ammonia-nitrogen wastewater by using formaldehyde as an ammonia absorbent. Adjust the pH value of the ammonia nitrogen wastewater in the process; c. Deamination: absorb the dehydrated deamination membrane through the formaldehyde solution; d. Discharge: classify the deamination wastewater and urotropine generated after the deamination treatment Export; the ammonia nitrogen concentration in the ammonia nitrogen wastewater in the step a is 300-10000mg / L; the heating temperature in the step b is 35-45°C, and the pH value of the ammonia nitrogen wastewater is adjusted to 10-12; the The deamination membrane in the step c is a hydrophobic microporous membrane, and its material is polypropylene, polyethylene, polyvinylidene fluoride or polytetrafluoroethylene; the formaldehyde solution of a certain concentration is that the formaldehyde content in the formaldehyde solution is 3- 8%.
Owner:HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
Amine/ammonia evaporation and absorption integrated device and application method thereof
ActiveCN112642173AReduce energy consumptionGuaranteed uptimeEvaporator accessoriesDispersed particle separationPhysical chemistryAmmonia gas
The invention relates to an amine / ammonia evaporation and absorption integrated device and an application method thereof. The device comprises an amine / ammonia distillation tower and an amine / ammonia absorption tower which are connected in series, and the amine / ammonia distillation tower is provided with a feeding port used for introducing an amine / ammonia-containing solution, a gas phase outlet, a first material outlet used for discharging materials obtained after amine / ammonia distillation and a circulating gas inlet; the amine / ammonia absorption tower is provided with a gas-phase inlet for introducing gas-phase amine / ammonia gas, an amine / ammonia absorption solution inlet for introducing an amine / ammonia absorption solution, a second material outlet for discharging an absorption material and a circulating gas outlet, the gas-phase outlet is communicated with the gas-phase inlet, and the circulating gas inlet is communicated with the circulating gas outlet; and a plurality of layers of tower plates are arranged in the amine / ammonia distillation tower and the amine / ammonia absorption tower, a pressure plate is arranged above each layer of tower plate, and a downcomer is arranged on each layer of tower plate. The device is applied to amine / ammonia cyclic utilization and amine / ammonia-containing wastewater treatment in the production process, and the purposes of low energy consumption of amine / ammonia distillation, high operation efficiency, safety, simplicity and convenience in operation, low operation cost and the like are achieved.
Owner:厦门市汇创源科技有限公司
Ammonia transporter gene and use thereof
InactiveCN101024835AControl amino acid contentFungiMicrobiological testing/measurementYeastBiotechnology
The present invention relates to ammonia transporter genes and use thereof. The invention relates in particular to a brewer's yeast which shows enhanced ammonia assimilation, alcoholic beverages produced using such yeast, and a method of producing such alcoholic beverages. More specifically, the invention relates to the MEP3 gene which codes for the ammonia transporter Mep3 in brewer's yeast, particularly to a yeast which can control the ammonia assimilation ability by controlling the level of expression of the nonScMEP3 gene or ScMEP3 gene characteristic to beer yeast and to a method of producing alcoholic beverages using such yeast.
Owner:SUNTORY HLDG LTD
Ammonia transporter gene and use thereof
InactiveCN101024834AControl amino acid contentFungiCell receptors/surface-antigens/surface-determinantsYeastBiotechnology
The present invention relates to ammonia transporter genes and use thereof. The invention relates in particular to a brewer's yeast which shows enhanced ammonia assimilation, alcoholic beverages produced using such yeast, and a method of producing such alcoholic beverages. More specifically, the invention relates to the MEP1 gene which codes for the ammonia transporter Mep1 in brewer's yeast, particularly to a yeast which can control the ammonia assimilation ability by controlling the level of expression of the nonScMEP1 gene or ScMEP1 gene characteristic to beer yeast and to a method of producing alcoholic beverages using such yeast.
Owner:SUNTORY HLDG LTD
Ammonia transporter gene and use thereof
The present invention relates to ammonia transporter genes and use thereof. The invention relates in particular to a brewer's yeast which shows enhanced ammonia assimilation, alcoholic beverages produced using such yeast, and a method of producing such alcoholic beverages. More specifically, the invention relates to the MEP1 gene which codes for the ammonia transporter Mep1 in brewer's yeast, particularly to a yeast which can control the ammonia assimilation ability by controlling the level of expression of the nonScMEP1 gene or ScMEP1 gene characteristic to beer yeast and to a method of producing alcoholic beverages using such yeast.
Owner:SUNTORY HLDG LTD
Ammonia transporter gene and use thereof
The present invention relates to ammonia transporter genes and use thereof. The invention relates in particular to a brewer's yeast which shows enhanced ammonia assimilation, alcoholic beverages produced using such yeast, and a method of producing such alcoholic beverages. More specifically, the invention relates to the MEP3 gene which codes for the ammonia transporter Mep3 in brewer's yeast, particularly to a yeast which can control the ammonia assimilation ability by controlling the level of expression of the nonScMEP3 gene or ScMEP3 gene characteristic to beer yeast and to a method of producing alcoholic beverages using such yeast.
Owner:SUNTORY HLDG LTD
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