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70results about How to "Increase denitrification rate" patented technology
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Coupling filler autotrophic denitrification biofilter and application
ActiveCN109052641ADifficult to dissolveIncrease speedWater treatment compoundsTreatment with anaerobic digestion processesBiofilmSewage
The invention discloses a coupling filler autotrophic denitrification biofilter and application and belongs to the technical field of sewage treatment. Pyrrhotite, sulfur and a carbon source are utilized to be mixed and coupled according to certain proportion; then the materials are put into a reactor, and the autotrophic denitrification biofilter can be formed after inoculating biofilm formation;sewage flows through the biofilter, and nitrogen and phosphorus in the water are removed. The biofilter disclosed by the invention has the advantages of simpleness, easiness, practicability and shortbiofilm formation time; when the biofilter is utilized to treat nitrogen and phosphorus containing sewage, hydraulic retention time is only 0.5 to 3 h, and yielding water can meet a requirement; furthermore, the biofilter has the advantages of excellent nitrogen and phosphorus removal effect, low cost and suitability for engineering application.
Owner:NANJING UNIV
Method and apparatus for swirling flow strengthened biodegradation treatment of sewage
InactiveCN108408894AHigh activityIncrease denitrification rateSludge treatmentTreatment with anaerobic digestion processesSludgeMedicine
The invention relates to the field of water treatment, and discloses a method and an apparatus for swirling flow strengthened biodegradation treatment of sewage. The method comprises: a, under an anoxic treatment condition, carrying out anoxic treatment on sewage and an active-sludge-containing material in an anoxic pool; b, carrying out aerobic treatment on the mixture obtained through the anoxictreatment in an aerobic pool to obtain a mixture A; and c, carrying out swirling flow breaking treatment on the part of the mixture A, returning the treated material to the anoxic pool, carrying outsolid-liquid separation on the remaining mixture A to separate the active sludge, sequentially carrying out swirling flow breaking treatment and hydrolysis acidification treatment on the at least partially separated active sewage, and returning the supernatant obtained through the hydrolysis acidification treatment to the anoxic pool. According to the present invention, with the method, the totalnitrogen removal effect in the biochemical process can be effectively improved, and the resource utilization of the sludge can be improved.
Owner:CHINA PETROLEUM & CHEM CORP
Sewage treatment device and sewage treatment method
InactiveCN104163543AEasy to handleProcess treatment effect is stable and reliableMultistage water/sewage treatmentSludgeBiological filter
The invention relates to a sewage treatment device and a sewage treatment method, and is used for treating mixed industrial sewage taking antibiotic pharmaceutical wastewater which is hardest to biologically degrade as a primary; the sewage undergoes nitrogen and phosphorus removal through mechanical interception, chemical oxidation, multiple biological degradation and chemical flocculation effects with a grid, a grit chamber, an adjusting primary sedimentation pool, a modified type inverted AA / O pool, an aerated biological filter pool, a flocculation sedimentation pool and a sludge concentration pool, and thus a quite good treatment effect is obtained, and CODcr, NH3-N, TP and other indicators of the effluent all reach first grade discharge standards; the method is stable and reliable in treatment effect and relatively low in operation cost. An improved anaerobic pool, anaerobic pool, aerobic pool and other biochemical reaction pools are each provided with an independent mud-water automatic separation device by self, so that sludge backflow is eliminated, the power consumption is relatively greatly reduced, the sewage treatment cost is reduced, and economy and technology dual advantages are provided. The coupling method provided by the invention is not easily affected by feedwater water quality fluctuation and other factors, allows the process to have strong resistance to shock loading, has the characteristics of good sludge sedimentation performance, no occurrence of a sludge expansion phenomenon and the like, and has a wide application prospect.
Owner:ZHANGZHOU INST OF TECH
Simultaneous phosphorus and nitrogen removal light material, preparation method and application thereof
PendingCN110078221ALarge specific surface areaQuality improvementWater treatment parameter controlGas treatmentPorosityElectron donor
The invention discloses a simultaneous phosphorus and nitrogen removal light material, a preparation method and the application thereof, and belongs to the technical field of environment function materials and sewage disposal. A fusion mixture is obtained by sufficiently fusing and dispersing sulfur and an iron-based component, wherein the iron-based component is a pyrite and calcium magnesium carbonate mixture; and foaming treatment is carried out on the fusion mixture to form the simultaneous phosphorus and nitrogen removal light material. The simultaneous phosphorus and nitrogen removal light material disclosed by the invention has the characteristics of high porosity, large specific surface area, light weight and high reaction activity. The obtained light material, as a microbial carrier and an electron donor of biochemical reactions, is applied to the reactors, such as fixed beds and fluidized beds, for sewage disposal, and has the advantages of good microorganism adhesion property, high denitrification speed and good phosphorous removal effect.
Owner:NANJING UNIV +1
Two-section type reinforced denitrification multistage soil percolation system
ActiveCN105502656AIncrease denitrification rateGood removal effectWater contaminantsTreatment with aerobic and anaerobic processesEngineeringOxygen
The invention discloses a two-section type reinforced denitrification multistage soil percolation system, comprising a front-section system and a rear-section system. The front-section system is an aerating aerobic open tank body and comprises a water inlet tank, an intake water distributor, a percolation layer, a hybrid module layer, a bottom cushion layer, a bottom drainpipe and an aeration system; the rear-section system is a non-aerating anoxic enclosed tank body and comprises an intake water distributor, a percolation layer, a hybrid module layer with novel solid-phase carbon source, a bottom cushion layer and a bottom drainpipe; the front-section system and the rear-section system are connected via a connecting pipe; and the vertical height of the two tank bodies is 20 to 50 cm. The two-section type reinforced denitrification multistage soil percolation system enables nitrification and denitrification to be independently carried out in different environments, so denitrification effect can be reinforced; since a degradable polymer is used as the novel solid-phase carbon source, the system has the substantial advantages of a high denitrification rate, no chroma influence on effluent and the like; and the system is low in infrastructure cost, stable in operation effect and convenient to maintain.
Owner:PEKING UNIV
Combined type biochar enhanced nitrogen removal filler and preparation method thereof
InactiveCN102923846AImprove denitrification effectAvoid pollutionTreatment with anaerobic digestion processesSustainable biological treatmentNitrogen removalHydrogen
Discloses a combined type biochar enhanced nitrogen removal filler and a preparation method thereof. The filler comprises modified rice hulls which are filled inside mesh suspended balls and filling rate is 60%. A modified method includes that the rice hulls are thrown into water in proportion of 1g / L : 100g / L, H2O2 is added to enable the water with the rice hulls to be in thickness of 15g / L to 20g / L, and HC1 or H2SO4 is used for adjusting potential of hydrogen (PH) value to 2-3. Besides, FESO4 is added to enable a solution to be in the thickness of 2g / L to 3g / L and then the solution is continuously stirred and reacts for 1.5-2 hours, and the rice hulls are fetched out to be cleaned and dried, and therefore the oxygenated rice hulls can be achieved. Next, in solid and liquid quality volume proportion of 1g / L : 100g / L, the rice hulls after being oxidized are throw into microelement mixed liquor to be soaked for 24 hours and then the solution is continuously stirred so as to enable the surfaces of the rice hulls to be absorbed with microelement. The mixed liquor comprises 1 mol / L FeSO4, 1 mol / L ZnSO4, 1 mol / L CuSO4Na2MoO4, and 1 mol / L MnSO4, and the rice hulls are fetched out to be dried so as to obtain the modified rice hulls.
Owner:江苏百纳环境工程有限公司
Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment
InactiveCN102417268AImprove nitrogen removal efficiencyImprove performanceTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentSequencing batch reactorAnaerobic aerobic
The invention belongs to the technical field of biological treatment of wastewater, and relates to a method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment. In the method for efficiently denitriding aerobic granular sludge, the reaction process is designed into multiple stages on the basis of a sequencing batch reactor, and an anaerobic-aerobic or low-oxygen alternate running mode is adopted at every stage; a water feeding mode for feeding water according to different proportions at multiple sections is designed according to the quality of fed water, and a water feeding point is set at the early anaerobic stage or the entire anaerobic stage of every stage in the reaction process. The method for efficiently denitriding aerobic granular sludge disclosed by the invention has the advantages of high denitriding efficiency, stable granular sludge performance and no need of adding any running cost, and is widely applied in the field of wastewater treatment.
Owner:FUDAN UNIV
Permeable reaction medium material for nitrate pollution of underground water
ActiveCN103803704AReduce dissolved oxygen contentCause secondary pollutionTreatment with anaerobic digestion processesContaminated groundwater/leachate treatmentGroundwater nitrateWater quality
The invention relates to a permeable reaction material for nitrate pollution of underground water. The permeable reaction medium material consists of quartz sand, denitrifying bacteria, chitosan, CaCl2, sodium alginate, coated nano iron and a Na2HPO4-NaH2PO4 buffering solution with the pH value of 7 at a mass ratio of (1-3):(0.1-0.5):(1-3):(1.5-3):(0.5-1):(0.5-1.5):50. The invention also discloses a method for preparing the permeable reaction material. By adopting the permeable reaction medium material, not only can the carbon source be released for the growth of microorganisms, but also the reducing environment of the underground water can be enhanced, the denitrifying rate is increased, the water quality is purified, and the secondary pollution problem of the nitrate reduction product can be effectively avoided.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
Energy-saving enhanced nitrogen removal process
InactiveCN101891347ASignificant comprehensive benefitsImprove total nitrogen removal rateMultistage water/sewage treatmentNitrogen removalReaction rate
The invention relates to an energy-saving enhanced nitrogen removal process, sewage sequentially passes through an anaerobic zone, a multi-stage aerobic-anoxic zone and a last-stage aerobic zone to complete the biological treatment process, and mud-water separation is completed in a secondary sedimentation tank. The multi-stage aerobic-anoxic zone comprises at least two stages, and each stage comprises an aerobic section and an anoxic section which are sequentially arranged. Outlet water after passing the anaerobic zone for anaerobic fermentation, one part directly enters into the first-stage aerobic section in the multi-stage aerobic-anoxic zone, and the other part respectively enters into the front ends of all stages of the anoxic sections in the multi-stage aerobic-anoxic zone by diversion through an open channel. The outlet water from the multi-stage aerobic-anoxic zone completely passes through the last-stage aerobic zone and enters into the secondary sedimentation tank for sedimentation, clear solution is discharged, one part of sediment is discharge, and the other part flows back into the anaerobic zone. The energy-saving enhanced nitrogen removal process has the characteristics of leading the denitrification reaction rate to be fast, shortening the reaction time, saving equipment required in the process and saving energy.
Owner:上海昊沧系统控制技术有限责任公司
Biological cathode electrochemical system for processing low C/N (carbon/nitrogen) ratio waste water, and method for processing waste water thereof
ActiveCN108178328ANo aeration requiredNo deoxygenation requiredWater treatment parameter controlBiochemical fuel cellsEscherichia coliNitration
The invention belongs to the technical fields of microbial fuel cells and water treatment, and provides a biological cathode electrochemical system for processing low C / N (carbon / nitrogen) ratio wastewater, and a method for processing waste water thereof in order to solve the problem that a cathode nitrate nitrogen removal rate is low and output voltage is low when the biological cathode of the traditional microbial fuel cell is at a low C / N ratio. The electrodes of a cathode chamber and an anode chamber are carbon brushes; escherichia coli is inoculated in the anode chamber; Acinetobacter sp.Y1 is inoculated in the cathode chamber; the cathode chamber and the anode chamber are respectively provided with a saturated calomel reference electrode; an anode conduction electrode and a cathodeconduction electrode are connected through an external resistor to form an integral circuit; the external resistor is connected with a voltage data collector in parallel. According to a reactor anodeconstructed by the invention, organic matters are consumed, decarburization is carried out for providing electrons, meanwhile, amine salt generates nitratlon reaction, and the cathode generates denitrification reaction. An experiment proves that the biological cathode BES (Bioelectrochemical system) can realize the effects of synchronous nitrification and denitrification as well as decarburizationand electricity generation.
Owner:TAIYUAN UNIV OF TECH
Method for realization of nitrite accumulation during nitrate reduction process
InactiveCN103601286AIncrease denitrification rateEfficiency advantageSustainable biological treatmentBiological water/sewage treatmentNitriteWater volume
A method for realization of nitrite accumulation during a nitrate reduction process, and belongs to the technical field of water treatment. The method is realized by the following steps: first, selecting a sludge type and concentration, setting the reactor sludge concentration to 1000 - 1500mg / L; selecting a carbon source and setting a carbon nitrogen ratio, when C / N reaches 2.5:1, instantly pouring raw water with the C / N being 2.5:1 into a reactor preloaded with sludge for sludge and water stirring and mixing, pouring water in again with helping of pH indication, after the last cycle is over and the water volume in the reactor reaches the upper limit of the reactor volume or an inflection point of a PH curve appears, when the PH value is greater than 9.5, stopping the reaction, precipitating for 10-15 min, separating the sludge and water, and draining away water after the precipitation is completed. The method is high in denitrification rate, simple to maintain, low in cost, and free of the need of professional operations.
Owner:NORTHEAST NORMAL UNIVERSITY
Water treatment filler capable of removing ammonia nitrogen and total nitrogen in wastewater synchronously
ActiveCN107720978AImprove ammonia nitrogen removal performanceImprove surface roughnessTreatment with aerobic and anaerobic processesSustainable biological treatmentChemistryCalcium carbonate
The invention discloses water treatment filler capable of removing ammonia nitrogen and total nitrogen in wastewater synchronously. The filler is of a cylindrical embedding-sleeving structure as a whole and is divided into an outer sleeving layer and an inner embedding layer. The outer sleeving layer is formed by foaming and blending outer sleeving layer materials, and the outer sleeving layer materials comprise low-density polyethylene (LDPE), basalt fiber and nano calcium carbonate powder. The inner embedding layer is blended by inner embedding layer materials, and the inner embedding layermaterials comprise polybuthylenesuccinate (PBS) and modified bamboo powder. By the adoption of the embedding-sleeving structure, the outer sleeving layer is provided with a pore structure which can allow microorganisms to gather together and a trichoid structure which extends outwards, under the aerobiotic and high-hydraulic-shearing condition, a surface turbulence environment is formed, and the inner embedding layer is in an alternating oxygen-enriched-microaerobic-anaerobic environment. The water treatment filler can synchronously remove ammonia nitrogen and total nitrogen, the running costof the filler is low, the volume load of unit nitrogen of wastewater treatment facilities can be increased in situ, and the selection contradiction of technological parameters of synchronously removing nitrogen and phosphorous in the running process of an actual technology can be effectively avoided.
Owner:ZHEJIANG UNIV
Device and method for purifying fish tank water
PendingCN107279031AImprove purification effectPromote nitrificationWater/sewage treatment by irradiationSpecific water treatment objectivesActivated carbonAntiseptic sterilization
The invention discloses a device and a method for purifying fish tank water. The device comprises a reactor shell, a physical filter chamber, a biochemical filter chamber and a sterilization and disinfection chamber. The reactor shell is provided with a water inlet and a water outlet, the physical filter chamber, the biochemical filter chamber and the sterilization and disinfection chamber are sequentially arranged in the reactor shell along a water flow direction, a filter cotton interception area is arranged in the physical filter chamber, a nitration area, an activated carbon area and a denitrification area are sequentially arranged in the biochemical filter chamber along the water flow direction, the nitration area is filled with fillers carrying nitrifying bacteria, the denitrification area is filled with fillers carrying denitrifying bacteria, and ultraviolet lamp tubes are arranged in the sterilization and disinfection chamber. The device and the method are used for purifying the fish tank water in a circulating manner and provide the most comfortable environment for fish school production.
Owner:ZHEJIANG GONGSHANG UNIVERSITY
Method for increasing denitrification rate in wastewater treatment through goethite
ActiveCN104692526ALarge specific surface areaImprove adsorption capacityTreatment with anaerobic digestion processesGoethiteWastewater disposal
The invention discloses a method for increasing denitrification rate in wastewater treatment through goethite. The method is characterized in that nanometer goethite is fed in a certain ratio according to carbon-nitrogen ratio into an anaerobic tank of a sewage treatment plant to be uniformly mixed; or granular goethite can fill as fillers a reaction column, a film is covered, sewage is poured into the reaction column from bottom to top after startup, and the hydraulic retention time is controlled to be 0.5 to 12h so that the sewage can be fully in contact with goethite; goethite promotes the microorganism to reduce nitrate in sewage into NO or N2O or N2 through organic matters in the sewage, so as to achieve the denitrification effect. With the adoption of the method, the denitrification rate can be increased, and the damage of accumulated nitrite to microorganism can be avoided; in addition, the quantity of fed external carbon sources can be decreased while the denitrification rate is increased, and thus the cost is effectively reduced.
Owner:HEFEI UNIV OF TECH
Compound deep purification ecological floating bed with external carbon source and purification treatment method thereof
ActiveCN103204610AReduce flow rateFavorable for attachment growthMultistage water/sewage treatmentPolystyreneEngineering
The invention relates to a compound deep purification ecological floating bed with an external carbon source and a purification treatment method thereof. The purification ecological floating bed structurally comprises a floating bed frame, an A bamboo raft, a geogrid, a polystyrene board, a plant, a nylon cable tie, a spherical framework, a gauze element, a starch / PHB (Poly-beta-hydroxybutyrate) blend, a fixing rod, a cuboid-shaped gabion and a B bamboo draft, wherein the A bamboo draft and the B bamboo draft are fixed onto the frame through iron wires; the plant 5 is fixed onto the polystyrene board; the polystyrene board is wrapped with the geogrid; the geogrid is fixed onto the frame through the nylon cable tie; a suspension rope is tied to the lower part of the geogrid; the starch / PHB blend is wrapped with the gauze element; the starch / PHB wrapped with the gauze element is placed into the framework; the framework is fixed onto the fixing rod; and the cuboid-shaped gabion is fixed onto the frame through iron wires. The compound deep purification ecological floating bed with the external carbon source has the advantages that the materials are easily available, cost is low, purification efficiency is high, effects are obvious, and management is convenient.
Owner:HOHAI UNIV
Treatment method of domestic sewage
ActiveCN108911134APromote reductionIncrease denitrification rateMembranesWater treatment parameter controlOxygenElectron transfer
The invention provides a treatment method of domestic sewage. The treatment method comprises the following steps: firstly, carrying out primary treatment on the domestic sewage through a grid and sediment to remove large-particle solid matters in the domestic sewage; conveying the domestic sewage subjected to the primary treatment into a membrane bioreactor and carrying out anaerobic-aerobic circulating treatment; in an aerobic treatment process, oxidizing nitrogen in the sewage into nitrite and nitrate through microorganisms; under an anaerobic condition, reducing the nitrate through denitrifying bacteria in the microorganisms, so as to realize molecular nitrogen or nitrous oxide. According to the treatment method, a hollow fiber membrane containing quinonyl is filled into the membrane bioreactor; in a microorganism denitrification process, the quinonyl can be used as an electron transfer vector to participate in a denitrification process and participate in and promote a reduction process of the nitrate (nitrite), and the denitrification speed is improved under an anaerobic condition, so that the efficient denitrification aim is realized.
Owner:XIAMEN UNIV OF TECH
Self-active denitrification carrier material and preparation method and application thereof
InactiveCN111977787AIncrease denitrification rateImprove stabilityTreatment with anaerobic digestion processesPhysical chemistrySulfuryl
The invention provides a self-active denitrification carrier material. The self-active denitrification carrier material comprises a granular matrix formed by melting and cooling a sulfur-based powdermaterial, an iron-based powder material and a carbonate powder material, wherein the granular matrix is filled with the iron-based powder material and the carbonate powder material in a dispersedly-coupled mode. The preparation method of the self-active denitrification carrier material comprises the steps: S10, the sulfur-based powder material, the iron-based powder material and the carbonate powder material are stirred and mixed to obtain a mixed powder material; S20, the mixed powder material is heated to melt the sulfur-based powder material, stirring is conducted to disperse the iron-basedpowder material and the carbonate powder material into a melt, and a molten mixture is obtained; and S30, the molten mixture is distributed and injected into cooling liquid to be cooled into a granular material, and then after filtering and drying, the self-active denitrification carrier material is prepared. According to the denitrification carrier material provided by the invention, the components are subjected to melting coupling and then granulated to form the uniform and stable carrier material, and the denitrification performance can be improved when the self-active denitrification carrier material is applied to the field of water treatment.
Owner:深圳市播绿者生态科技股份有限公司 +1
Synthetic method of nanofiber membrane-shaped efficient water body solid-phase denitrification carbon source
ActiveCN111826805AAvoid missingGood carrierWater contaminantsElectro-spinningHydroxybutyric acidElectrospun nanofibers
The invention discloses a synthetic method of a nanofiber membrane-shaped efficient water body solid-phase denitrification carbon source. The synthetic method comprises the following steps of S1, mixing degradable synthetic polymers according to a ratio of 1: (1-10) to form a solid-phase mixture; S2, mixing DMF (dimethylformamide) and trichloromethane according to a ratio of 1: (1-10) to form a liquid-phase mixture; S3, dissolving the solid-phase mixture into the liquid-phase mixture at the temperature of 40-60 DEG C to obtain a polymer solution with the content of PHB (polyhydroxybutyrate) / PHBV (polyhydroxyvalerate) / PLA (polylactic acid) being 4-12wt%; S4, performing electrostatic spinning on the polymer solution to obtain an electrospun nanofiber membrane; and S5, putting the electrospunnanofiber membrane into a vacuum drying oven at 60 DEG C for 2 to 24h, cleaning the electrospun nanofiber membrane with deionized water, and drying the cleaned electrospun nanofiber membrane in a drying oven at 80-120 DEG C to obtain the nanofiber membrane-shaped efficient solid-phase denitrification carbon source for the water body, so that denitrification nitrogen removal can be performed on low-concentration, large-water-volume and eutrophicated natural water body, and the removal rate of nitrate nitrogen can reach 99%.
Owner:TONGJI UNIV
Polyethylene glycol-containing composite carbon source for biological denitrification of sewage, and preparation method thereof
PendingCN113666494AMake sure it doesn't freezeLow priceWater treatment compoundsTreatment with anaerobic digestion processesSodium acetateMicroorganism
The invention discloses a polyethylene glycol-containing composite carbon source for biological denitrification of sewage. The composite carbon source comprises, by mass, 10-15% of polyethylene glycol, 10-15% of polyol, 10-20% of glucose, 20-25% of molasses, 5-10% of sodium acetate, 1-3% of calcium acetate, 0.2-0.5% of bactericide, 0.1-0.2% of defoaming agent, and the balance of water, and the sum of the components is 100%. The invention also relates to a preparation method of the polyethylene glycol-containing composite carbon source for biological denitrification of sewage.The composite carbon source can meet the nutrition required by microorganisms in different growth stages in microbiota, and high-efficiency denitrification of wastewater is realized, so that the problems of insufficient carbon source in low-temperature seasons and high nitrogen removal efficiency in the prior art are solved. The technical problems that the price of a carbon source is high, and long-term addition of a single carbon source affects bacterial microorganisms in a denitrification section and structural diversity of denitrifying bacterial communities. The composite carbon source is free of harmful substances, low in price and capable of overcoming the defects of existing carbon sources.
Owner:南京苏楻生物科技有限公司
Wastewater total nitrogen removal equipment
ActiveCN113023877AIncrease contact areaPrevent precipitationTreatment using aerobic processesWater treatment compoundsNitrogen removalWastewater
The invention discloses wastewater total nitrogen removal equipment, and belongs to the technical field of nitrogen removal. The wastewater total nitrogen removal equipment comprises a box body, a suspension ball filler, a primary denitrification area, a secondary denitrification area, an MBR treatment area, a first stirrer, a second stirrer, a gas supply assembly, a transmission mechanism, a first gear, a second gear, a first rotating shaft, a first bearing seat, a first bevel gear, a second bevel gear and a solar power supply group. The primary denitrification area, the secondary denitrification area and the MBR treatment area are sequentially communicated in the box body from left to right, a plurality of suspended ball fillers are arranged in each of the primary denitrification area and the secondary denitrification area, the first stirrer is arranged in the primary denitrification area, the second stirrer is arranged in the secondary denitrification area, and two air outlet ends of the gas supply assembly respectively extend into the first stirrer and the second stirrer. The wastewater total nitrogen removal equipment disclosed by the invention has the advantages of multi-stage nitrogen removal treatment, good nitrogen removal effect, container type integrated design, capability of being integrally moved and carried and convenience in installation.
Owner:逸辰环保科技(厦门)有限公司
Method and system device for removing nitrate in water based on S-Fe collaborative autotrophic denitrification
InactiveCN107399829AReduce outputEmission reductionWater treatment parameter controlWater contaminantsWater basedHigh concentration
The invention discloses a method and system device for removing nitrate in water based on S-Fe collaborative autotrophic denitrification. The method comprises the steps of treating wastewater containing sulfate in an anoxic or anaerobic reactor by virtue of sulfur particles, iron particles and denitrifying bacteria, and separating water by virtue of a membrane module. The invention further provides the system device for implementing the method. According to the system device, the autotrophic denitrification of S and the autotrophic denitrification of Fe are collaborated in the reactor, denitrification and separation processes are combined together, activated sludge, S and Fe are fluidized through stirring, and efficient autotrophic denitrification is adequately carried out. According to the method, the autotrophic denitrification of S and the autotrophic denitrification of Fe are collaboratively coupled, and the control of the generation amount of sulfate radicals and the maintenance of the pH value of a reaction system are simultaneously realized. The method is suitable for treating medium-concentration and high-concentration nitrate wastewater, has the advantages of high nitrate removal rate, simplicity in operation, small occupied area, low operation cost and the like and will play an important role in treatment practice of nitrate wastewater.
Owner:江苏东材新材料有限责任公司 +1
Treatment method of livestock and poultry wastewater
ActiveCN108911135ASpeed up the restore processIncrease speedWaste water treatment from animal husbandryTreatment with aerobic and anaerobic processesLivestockPollutant
The invention provides a treatment method of livestock and poultry wastewater. The treatment method comprises the following steps: carrying out primary treatment on the livestock and poultry wastewater through a wetland, wherein aquatic plants are planted in the wetland; conveying the wastewater subjected to the primary treatment into a membrane bioreactor and carrying out anaerobic-aerobic circulating treatment, wherein the membrane bioreactor is internally filled with a hollow fiber membrane containing quinonyl. According to the treatment method of the livestock and poultry wastewater, provided by the invention, firstly, the wetland is used for carrying out the primary treatment on the livestock and poultry wastewater, and organic pollutants, nitrogen, phosphorus and the like in the livestock and poultry wastewater are removed primarily; then the membrane bioreactor is used for carrying out the anaerobic-aerobic circulating treatment on the wastewater subjected to the primary treatment; the membrane bioreactor is internally filled with the hollow fiber membrane containing the quinonyl, the quinonyl in the fiber membrane can be used for accelerating a reduction process of the nitrogen and a denitrification speed under an anaerobic condition is improved, so that the efficient denitrification aim is realized, and the aim of finishing COD (Chemical Oxygen Demand) removal and denitrification at the same time is realized.
Owner:XIAMEN UNIV OF TECH
Denitrification nitrogen removal microflora and application thereof
InactiveCN109368785AImprove running stabilityImprove nitrogen removal efficiencyWater contaminantsTreatment with anaerobic digestion processesSolid carbonPseudomonas
The invention belongs to the technical field of environmental protection and discloses a denitrification nitrogen removal microflora and application thereof. The microflora comprises pseudomonas, burkholderia and cupriavidus. The microflora is separated from a solid carbon source denitrification bio-reactor in long-term operation. The microflora is stable in structural performance, high in nitrogen removal activity and capable of simultaneously degrading antibiotic pollutants in wastewater. The microflora is capable of utilizing multiple dissolved organic matters and insoluble biodegradable high polymers as denitrification carbon sources, and nitrate in the wastewater is effectively removed. The microflora can be attached to a carrier to form a bio-film, can be directly added into the denitrification bio-reactor, is used for removing nitrate and antibiotics in water, and has high adaptability on the wastewater quality, inlet water dissolved oxygen (DO) concentration and wastewater pH value.
Owner:宁波水思清环境科技有限公司
Short-range nitrification-denitrification municipal wastewater treatment system and method
InactiveCN109502755AReduce kinetic energyReduce infrastructure costsTreatment with aerobic and anaerobic processesWater storageSludge
The invention discloses short-range nitrification-denitrification municipal wastewater treatment system and method. The short-range nitrification-denitrification municipal wastewater treatment systemcomprises a water storage pond, a primary settling tank, a facultative tank, an aerobic tank and a secondary settling tank communicating sequentially, wherein a grid is arranged between the water storage pond and the primary settling tank; municipal wastewater from the water storage pond passes through the grid, so that suspended solids are preliminarily removed; a feeding port is formed between the primary settling tank and the facultative tank; a sewage reflow system is arranged between the aerobic tank and the facultative tank; a part of sewage in the aerobic tank reflows to the facultativetank through the sewage reflow system; a sludge reflow system is arranged between the secondary settling tank and the facultative tank; a part of sludge reflows to the facultative tank; excess sludgeis discharged through a sludge discharge system. According to the short-range nitrification-denitrification municipal wastewater treatment system and the method provided by the invention, through controlling the process conditions, a nitrification tank-aerobic tank is simplified to be a short-range nitrification tank, so that the required kinetic energy is greatly reduced; therefore, compared with a common municipal wastewater treatment process, according to the process, the capital construction cost is remarkably reduced, the treatment capacity is high, the effect is good, and the process ishigh-efficiency and stable.
Owner:NANJING HIGH TECH UNIV BIOLOGICAL TECH RES INST CO LTD
Method of enriching short-cut denitrifying bacteria by substrate feeding and intermittent operation
InactiveCN108892240AControl COD concentrationIncrease denitrification rateWater contaminantsBiological treatment apparatusActivated sludgeNitrite
A method of enriching short-cut denitrifying bacteria by substrate feeding and intermittent operation belongs to the technical field of water treatment. Activated sludge containing short-cut denitrifying bacteria is used as inoculating sludge; a bacterial fermenting tank is utilized to allow enrichment culture of short-cut denitrifying bacterial colonies within a short term by means of substrate (nitrites and organics) feeding and intermittent operation. The short-cut denitrifying bacterial colonies attained herein are of numerical dominance in total bacteria, high nitrite-denitrifying rate can be achieved, and the capacity to carry out denitrifying by using nitrates as electron receptors is imparted.
Owner:TSINGHUA UNIV
Solid carbon source suitable for high-concentration nitrate nitrogen sewage treatment and preparation method thereof
InactiveCN111362404APromote degradationReduce manufacturing costWater treatment compoundsWater contaminantsSolid carbonNitrate nitrogen
The invention discloses a solid carbon source suitable for a high-concentration nitrate nitrogen sewage treatment. The solid carbon source comprises PBS, biologically fermented bamboo powder, starch,water and a silane coupling agent according to a ratio of (25-65): (30-50): (6-30): (1-4): (1-6). The preparation method comprises the following steps: step one, uniformly mixing PBS, biologically fermented bamboo powder, starch, water and a silane coupling agent in a high-speed mixer according to the set ratio; step two, adding the uniformly mixed materials into a twin-screw extruder, adjusting the temperature to 110-130 DEG C, carrying out internal mixing, melting, blending and uniformly stirring; and step three, extruding the blend by a twin-screw extruder, cooling the extrudate by water, crushing the extrudate, granulating the powder, and drying. The production cost of the solid carbon source is reduced, meanwhile, the biomass utilization rate is improved, and the waste of resources ismaximally reduced.
Owner:宁波益可达新材料有限公司
A method for rapidly achieving and stably maintaining short-cut nitrification in a continuous flow process
ActiveCN101759290BReduce outputPromote growthSustainable biological treatmentBiological water/sewage treatmentAeration systemControl system
Owner:彭永臻
Method for treating polluted water body by synchronous nitrification and denitrification biological carrier coupling system
ActiveCN112744916AAperture small noUniformity NoneWater contaminantsTreatment with aerobic and anaerobic processesCelluloseBiofilm
The invention discloses a method for treating a polluted water body by a synchronous nitrification and denitrification biological carrier coupling system. A construction method of the synchronous nitrification and denitrification biological carrier coupling system comprises the following steps: 1) preparing a degradable cellulose carrier and biochar; 2) constructing a biological membrane device; 3) arranging the degradable cellulose carrier, the biochar and a conventional carrier in the biological membrane device, and adding functional bacteria to form the synchronous nitrification and denitrification biological carrier coupling system. The synchronous nitrification and denitrification biological carrier coupling system can quickly enrich functional microorganisms in a water body which is mainly polluted by ammonia nitrogen and nitrate nitrogen by utilizing the strong adsorption performance of a degradable cellulose carrier slow-release carbon source and biological carbon, so that an efficient denitrification effect is achieved.
Owner:ZHEJIANG OCEAN UNIV
Preparation method of denitrification carbon source for sewage treatment
ActiveCN112279370AGood dispersionReduce total usageTreatment with anaerobic digestion processesWater/sewage treatment by sorptionPolyvinyl alcoholGlycerol
The invention discloses a preparation method of a denitrification carbon source for sewage treatment. The preparation method comprises the following steps: dissolving polyamino acid or a sodium salt thereof and inorganic base in glycerol, immersing starch in the obtained solution, and conducting reacting according to a weight ratio of the starch to the polyamino acid or the sodium salt thereof tothe inorganic base to the glycerol of 1: (4-8): (0.5-10): (20-40) at a reaction temperature of 100-120 DEG C for 10-20 h; adding polyvinyl alcohol and an emulsifier after the reaction is finished, conducting mixing according to a mass ratio of (2-4): (1-2): (0.5-1), performing reacting at 60-80 DEG C for 1-2 h, carrying out cooling to room temperature, adding a coagulant aid, trace elements and vitamins, performing uniform stirring, and conducting drying to obtain the denitrification carbon source. The denitrification carbon source prepared by using the method disclosed by the invention is high in denitrification total nitrogen removal rate and small in dosage, and compared with a pure carbon source, denitrification total nitrogen removal efficiency and capacity present obvious technical advantages in short-term and long-term processes.
Owner:神美科技有限公司
A coupling packing autotrophic denitrification biological filter and its application
ActiveCN109052641BDifficult to dissolveIncrease speedWater treatment compoundsTreatment with anaerobic digestion processesBiological filterPyritic sulfur
The invention discloses a coupling filler autotrophic denitrification biofilter and application and belongs to the technical field of sewage treatment. Pyrrhotite, sulfur and a carbon source are utilized to be mixed and coupled according to certain proportion; then the materials are put into a reactor, and the autotrophic denitrification biofilter can be formed after inoculating biofilm formation;sewage flows through the biofilter, and nitrogen and phosphorus in the water are removed. The biofilter disclosed by the invention has the advantages of simpleness, easiness, practicability and shortbiofilm formation time; when the biofilter is utilized to treat nitrogen and phosphorus containing sewage, hydraulic retention time is only 0.5 to 3 h, and yielding water can meet a requirement; furthermore, the biofilter has the advantages of excellent nitrogen and phosphorus removal effect, low cost and suitability for engineering application.
Owner:NANJING UNIV
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